> This is part 1 of 9 of the full documentation (pages 1–100 of 834). > The content is paginated: fetch every part to see all of it. > Next part: https://docs.lorric.com/qr/llms-full.txt/1 > Page index: https://docs.lorric.com/qr/llms.txt # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation This site has an agentic ask interface you may use to query the documentation dynamically by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.lorric.com/qr/index.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. --- # LORRIC Integration and Application Center Please Choose your LORRIC product to view manuals, setup guides, and application resources for your device.

	Cover image
FU-LT	FU-LT-gitbook-cover-img-2.png	FU-LT Ultrasonic Flowmeter
FU-ES	FU-ES-gitbook-cover-img.png	FU-ES Ultrasonic Flowmeter
FU-TX 310	FU-TX310-gitbook-cover-img.png	FU-TX 310 Ultrasonic Flowmeter
FP-AS310	FP-AS310-gitbook-cover-img.png	FP-AS310 Paddle Wheel Flowmeters
FP-AS510	FP-AS510-gitbook-cover-img.png	FP-AS510 Paddle Wheel Flowmeters

*** 🌐 **Switch language:** Use the language menu in the **top-right corner** Simplified Chinese Manual 简体中文手册 # Flow Meter # FU-LT Ultrasonic Flowmeter

Contents

* [#identify-hardware-firmware-version](#identify-hardware-firmware-version "mention") * [#select-product-manual-version](#select-product-manual-version "mention") * [FU-LT Ultrasonic Flowmeter](/qr/lorric-integration-and-application-center-en/flow-meter/fu-lt-ultrasonic-flowmeter#drawing)

***

How to Identify Hardware/Firmware Version (click to expand)

## Identify Hardware/Firmware Version Use the methods below to identify your product Hardware/Firmware Version

H12 System Info	Startup Screen	Device Label
Access parameter H12 – System Info to verify the device model and main unit version. P1002 : Device firmware version (identical to the version shown on the startup screen) D1002 and S1102 : Hardware version 015 : Device model (DN8 pipe size)	The startup screen is displayed for approximately three seconds after the flowmeter is powered on. LORRIC : Trademark FU-LT 020 : Device model (DN8 pipe size) P1002 : Device firmware version	A label is affixed to the flowmeter housing. FU-LT 015 : Device model (DN8 pipe size) SN: 15-026 : Device serial number Note: The label may become unreadable over time. Record the serial number upon receipt.

H12 System Info

Startup Screen

Device Label

Access parameter H12 – System Info to verify the device model and main unit version.

P1002 : Device firmware version (identical to the version shown on the startup screen)
D1002 and S1102 : Hardware version
015 : Device model (DN8 pipe size)

The startup screen is displayed for approximately three seconds after the flowmeter is powered on.

LORRIC : Trademark
FU-LT 020 : Device model (DN8 pipe size)
P1002 : Device firmware version

A label is affixed to the flowmeter housing.

FU-LT 015 : Device model (DN8 pipe size)
SN: 15-026 : Device serial number

Note: The label may become unreadable over time. Record the serial number upon receipt.

## Select Product Manual Version After identifying the Hardware & Firmware Version, Refer to the information below to select the right product manual

Customer group	Hardware Ver.	Firmware Ver.	Manual link	Note
The latest version is available to all users		P1001	FU-LT V1

*** ## Drawing {% hint style="warning" %} Dimensions and shapes shown are for reference only. Final products may vary due to manufacturing tolerances and design revisions. Please refer to the actual product to confirm. {% endhint %}

Type	2D dxf	2D PDF	3D Step
dn08	FU-LT008.dxf	FU-LT008.pdf	FU-LT008.step
dn10	FU-LT010.dxf	FU-LT010.pdf	FU-LT010.step
dn15	FU-LT015.dxf	FU-LT015.pdf	FU-LT015.step
dn20	FU-LT020.dxf	FU-LT020.pdf	FU-LT020.step
dn25	FU-LT025.dxf	FU-LT025.pdf	FU-LT025.step

# FU-ES Ultrasonic Flowmeter

Contents

* [#identify-hardware-firmware-version](#identify-hardware-firmware-version "mention") * [#select-product-manual-version](#select-product-manual-version "mention") * [#drawing](#drawing "mention")

***

How to Identify Hardware/Firmware Version (click to expand)

## Identify Hardware/Firmware Version Use the methods below to identify your product Hardware/Firmware Version

H12 System Info	Startup Screen	Device Label
Access parameter H12 – System Info to verify the device model and main unit version. P1003: Device firmware version (identical to the version shown on the startup screen) D1205 and S1102: Hardware version 025: Device model (DN25 pipe size)	The startup screen is displayed for approximately three seconds after the flowmeter is powered on. LORRIC: Trademark FU-ES 025: Device model (DN25 pipe size) P1205: Device firmware version	A label is affixed to the flowmeter housing. FU-ES 025: Device model (DN25 pipe size) 22UD00433 Device serial number • Hardware 1.0/2.0 refers to the product's hardware version. Note: The label may become unreadable over time. It's recommended to record the serial number upon receipt.

H12 System Info

Startup Screen

Device Label

Access parameter H12 – System Info to verify the device model and main unit version.

P1003: Device firmware version (identical to the version shown on the startup screen)
D1205 and S1102: Hardware version
025: Device model (DN25 pipe size)

The startup screen is displayed for approximately three seconds after the flowmeter is powered on.

LORRIC: Trademark
FU-ES 025: Device model (DN25 pipe size)
P1205: Device firmware version

A label is affixed to the flowmeter housing.

FU-ES 025: Device model (DN25 pipe size)
22UD00433 Device serial number

• Hardware 1.0/2.0 refers to the product's hardware version.

Note: The label may become unreadable over time. It's recommended to record the serial number upon receipt.

## Select Product Manual Version After identifying the Hardware & Firmware Version, Refer to the information below to select the right product manual

Customer group	Hardware Ver.	Firmware Ver.	Manual link	Note
The latest version is available to all users	1.0/2.0~	P1205	FU-ES English V1

Type	2D dxf	2D PDF	3D Step
DN15	dn15_body_lite.dxf	dn15_body_lite.pdf	dn15_body_lite.step
DN20	dn20_body_lite.dxf	dn20_body_lite.pdf	dn20_body_lite.step
DN25	dn25_body_lite.dxf	dn25_body_lite.pdf	dn25_body_lite.step
DN32	dn32_body_lite.dxf	dn32_body_lite.pdf	dn32_body_lite.step
DN40	FU-ES_DN40.dxf	FU-ES_DN40.pdf	dn40-STP.step
DN50	FU-ES_DN50.dxf	FU-ES_DN50.pdf	dn50-STP.step
DN65	FU-ES_DN65.dxf	FU-ES_DN65.pdf	dn65-STP.step
DN75	FU-ES_DN75.dxf	FU-ES_DN75.pdf	dn75.step

# FU-TX 310 Ultrasonic Flowmeter ### Current customer groups and manual links for each version


Customer group	HW Ver.	Firmware Ver.	Manual link	Noted
Latest version	v4.0.0	1.2.9	Link	Under verification, that customer to need "temperature" "damping" function choose to use it.
Stable version	v4.0.0	1.2.8	Link	Applicable to verified customers
	~v3.0.0	2.x.x	Link

# FP-AS310 Paddle Wheel Flowmeters

Contents

* [#identify-hardware-firmware-version](#identify-hardware-firmware-version "mention") * [#select-product-manual-version](#select-product-manual-version "mention") * [#product-drawings-plastic-tee](#product-drawings-plastic-tee "mention") * [#product-drawings-metal-tee](#product-drawings-metal-tee "mention")

***

How to Identify Hardware/Firmware Version (click to expand)

## Identify Hardware/Firmware Version Use the methods below to identify your product Hardware/Firmware Version {% stepper %} {% step %} #### Identify Hardware Version You can find the hardware version on the sticker on the left side of the device.

{% endstep %} {% step %} #### Identify Firmware Version Firmware version could be found on the bottom right of the boot screen indicated by a red sign like shown below.

{% endstep %} {% endstepper %}

## Select Product Manual Version After identifying the Hardware & Firmware Version, Refer to the information below to select the right product manual

	Firmware Ver.	Manual link	Note
Latest Product Release	P1006	A versionFP-AS310(A) V5 Manual	NPN output + Analog current output (4-20mA)
Latest Product Release	P1006	R versionFP-AS310(R) V5 Manual	RS485 Modbus RTU + Modbus RTU Protocol
	P1002	V1 Manual

*** ## Drawing Due to the extensive variety of optional components, a single diagram may correspond to multiple part numbers. The diagram will not explicitly display differences in part number positions; instead, these will be denoted by an asterisk (\*) to indicate variable components. {% hint style="warning" %} Dimensions and shapes shown are for reference only. Final products may vary due to manufacturing tolerances and design revisions. Please refer to the actual product to confirm. {% endhint %} ### Product Drawings (Plastic Tee)

Type	2D dxf	2D PDF	3D step/stp
2-1/2" Plastic spigot Tee + FP-AS310/510 Main Unit	FP-AS510_DN65_spigot.dxf	FP-AS510_DN65_spigot.pdf	dn65-as510_asm_1_asm.stp
2-1/2" Plastic flange Tee + FP-AS310/510 Main Unit	FP-AS510_2_5IN_PIPE_1_1.dxf	FP-AS510_2_5IN_PIPE_1_1-Model.pdf	2_5IN_PIPE_1_1.step
2" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_2IN_2_1.dxf	FP-AS510_2IN_2_1-Model.pdf	2IN_2_1.step
1-1/2" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_1_5IN_2_1.dxf	FP-AS510_1_5IN_2_1-Model.pdf	1_5IN_2_1.step
1-1/4" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_1-25IN_2_1.dxf	FP-AS510_1-25IN_2_1-Model.pdf	1-25IN_2_1.step
1" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_1IN_3_1.dxf	FP-AS510_1IN_3_1-Model.pdf	1IN_3_1.step
3/4" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_0-75IN_5_1.dxf	FP-AS510_0-75IN_5_1-Model.pdf	0-75IN_5_1.step
1/2" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_0-5IN_2_1.dxf	FP-AS510_0-5IN_2_1-Model.pdf	FP-AS510_0-5IN.step

### Product Drawings (Metal Tee)

Type	2D dxf	2D PDF	3D step/stp
2" Metal Internal Thread Tee + FP-AS310/510 主Main Unit	DN50_SUS_TEE.dxf	DN50_SUS_TEE-Model.pdf	DN50_SUS_TEE.step
1-1/2" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN40_SUS_TEE.dxf	DN40_SUS_TEE-Model.pdf	DN40_SUS_TEE.step
1-1/4" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN32_SUS_TEE.dxf	DN32_SUS_TEE-Model.pdf	DN32_SUS_TEE.step
1" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN25-TEE_FEMALE.dxf	DN25-TEE_FEMALE-Model.pdf	DN25_TEE_FEMALE.step
3/4" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN20-TEE_FEMALE.dxf	DN20-TEE_FEMALE-Model.pdf	DN20-TEE_FEMALE v1.step
1/2" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN15-TEE_FEMALE.dxf	DN15-TEE_FEMALE-Model.pdf	DN15-TEE_FEMALE.step
1" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN25-TEE_MALE.dxf	DN25-TEE_MALE-Model.pdf	DN25_TEE_MALE.step
3/4" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN20-TEE_MALE.dxf	DN20-TEE_MALE-Model.pdf	DN20-TEE_MALE.step
1/2" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN15-TEE_MALE.dxf	DN15-TEE_MALE-Model.pdf	DN15-TEE_MALE.step

# FP-AS510 Paddle Wheel Flowmeters

Contents

* [#identify-hardware-firmware-version](#identify-hardware-firmware-version "mention") * [#select-product-manual-version](#select-product-manual-version "mention") * [#product-drawings-plastic-tee](#product-drawings-plastic-tee "mention") * [#product-drawings-metal-tee](#product-drawings-metal-tee "mention")

***

How to Identify Hardware/Firmware Version (click to expand)

{% endstep %} {% step %} #### Identify Firmware Version Firmware version could be found on the bottom right of the boot screen indicated by a red sign like shown below.

{% endstep %} {% endstepper %}

## Select Product Manual Version After identifying the Hardware & Firmware Version, Refer to the information below to select the right product manual {% hint style="warning" icon="sparkle" %} ## Latest Version Hardware Version: 2-1-BGA\ Firmware Version: P2301\ Note: Full RS485 functional customer verification testing
{% endhint %} #### Other Stable Versions | Hardware Ver. | Firmware Ver. | Note | | | :-----------: | :-----------: | :--------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------------: | | 2-1-BGA | 2.2.9 | Customer verification passed | V2 Manual | | V1.3.0\~ | 2.x.x | | V2 Manual | | V1.0.0\~ | 1.X.X | | V1 Manual | *** ## Drawing Due to the extensive variety of optional components, a single diagram may correspond to multiple part numbers. The diagram will not explicitly display differences in part number positions; instead, these will be denoted by an asterisk (\*) to indicate variable components. {% hint style="warning" %} Dimensions and shapes shown are for reference only. Final products may vary due to manufacturing tolerances and design revisions. Please refer to the actual product to confirm. {% endhint %} ### Product Drawings (Plastic Tee)

Type	2D dxf	2D PDF	3D step/stp
2-1/2" Plastic spigot Tee + FP-AS310/510 Main Unit	FP-AS510_DN65_spigot.dxf	FP-AS510_DN65_spigot.pdf	dn65-as510_asm_1_asm.stp
2-1/2" Plastic flange Tee + FP-AS310/510 Main Unit	FP-AS510_2_5IN_PIPE_1_1.dxf	FP-AS510_2_5IN_PIPE_1_1-Model.pdf	2_5IN_PIPE_1_1.step
2" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_2IN_2_1.dxf	FP-AS510_2IN_2_1-Model.pdf	2IN_2_1.step
1-1/2" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_1_5IN_2_1.dxf	FP-AS510_1_5IN_2_1-Model.pdf	1_5IN_2_1.step
1-1/4" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_1-25IN_2_1.dxf	FP-AS510_1-25IN_2_1-Model.pdf	1-25IN_2_1.step
1" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_1IN_3_1.dxf	FP-AS510_1IN_3_1-Model.pdf	1IN_3_1.step
3/4" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_0-75IN_5_1.dxf	FP-AS510_0-75IN_5_1-Model.pdf	0-75IN_5_1.step
1/2" Plastic Union Tee + FP-AS310/510 Main Unit	FP-AS510_0-5IN_2_1.dxf	FP-AS510_0-5IN_2_1-Model.pdf	FP-AS510_0-5IN.step

### Product Drawings (Metal Tee)

Type	2D dxf	2D PDF	3D step/stp
2" Metal Internal Thread Tee + FP-AS310/510 主Main Unit	DN50_SUS_TEE.dxf	DN50_SUS_TEE.pdf	DN50_SUS_TEE.step
1-1/2" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN40_SUS_TEE.dxf	DN40_SUS_TEE-Model.pdf	DN40_SUS_TEE.step
1-1/4" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN32_SUS_TEE.dxf	DN32_SUS_TEE-Model.pdf	DN32_SUS_TEE.step
1" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN25-TEE_FEMALE.dxf	DN25-TEE_FEMALE-Model.pdf	DN25_TEE_FEMALE.step
3/4" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN20-TEE_FEMALE.dxf	DN20-TEE_FEMALE-Model.pdf	DN20-TEE_FEMALE v1.step
1/2" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN15-TEE_FEMALE.dxf	DN15-TEE_FEMALE-Model.pdf	DN15-TEE_FEMALE.step
1" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN25-TEE_MALE.dxf	DN25-TEE_MALE-Model.pdf	DN25_TEE_MALE.step
3/4" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN20-TEE_MALE.dxf	DN20-TEE_MALE-Model.pdf	DN20-TEE_MALE.step
1/2" Metal Internal Thread Tee + FP-AS310/510 Main Unit	DN15-TEE_MALE.dxf	DN15-TEE_MALE-Model.pdf	DN15-TEE_MALE.step

# Rotameter - Variable Area Flow Meter {% hint style="warning" %} Dimensions and shapes shown are for reference only. Final products may vary due to manufacturing tolerances and design revisions. Please refer to the actual product to confirm. {% endhint %} ### Drawing File Download

Type	2D dxf	2D PDF	3D Step
F22	F22.dxf	F22.pdf	f22.step
F32B	F32B.dxf	F32B.pdf	F32b-body.step
F34	F34.dxf	F34.pdf	F34.step
F45	F45.dxf	F45.pdf	F45.step
F45 Flange	F45_Flange.dxf	F45_Flange.pdf	f45_Flange.step
F46	F46.dxf	F46.pdf	f46-body.step
F101_1-2in	F101_1-2IN.dxf	F101_1-2IN.pdf	F101_1-2in.step
F201	F201.dxf	F201.pdf	F201.step
F301_1in	f301_1in.dxf	F301_1IN.pdf	F301_1in_2024.step
F311	F311.dxf	F311.pdf	F311.step

# Optional Fittings ## Downloadable Diagrams {% hint style="warning" %} Dimensions and shapes shown are for reference only. Final products may vary due to manufacturing tolerances and design revisions. Please refer to the actual product to confirm. {% endhint %} ### Pipe rack

Type	2D dxf	2D PDF	3D step/stp
Pipe clamp bracket-50	Clamp-pipe-support-50.dxf	Clamp-pipe-support-50-Model.pdf	Clamp-support-50-assem.step
Pipe clamp bracket-65	Clamp-pipe-support-65.dxf	Clamp-pipe-support-65-Model.pdf	Clamp-support-65-assem.step

# Nozzle ## Drawing File Download {% hint style="warning" %} Dimensions and shapes shown are for reference only. Final products may vary due to manufacturing tolerances and design revisions. Please refer to the actual product to confirm. {% endhint %} ### One-piece nozzles

Type	2D dxf	2D PDF	3D Step
1/4" H metal flat fan nozzle	1-4in_nozzle.dxf	1-4in_nozzle.pdf	1-4in_nozzle.step
1/8" KP one-piece metal cone nozzle	KP-1_8.dxf	KP-1_8-Model.pdf	KP-1_8.step
1/4" KP one-piece metal cone nozzle	KP-1_4.dxf	KP-1_4-Model.pdf	1_4_kp.step
3/8" KP one-piece metal cone nozzle	KP-3_8.dxf	KP-3_8-Model.pdf	KP-3_8.step
1/4" KPMF one-piece metal cone nozzle	kpmf-1-4.dxf	KPMF-1_4.pdf	KPMF1_4.step
1/8" KPMF one-piece metal cone nozzle	KPMF-1_8.dxf	KPMF-1_8.pdf	KPMF-1_8.step
3/8" KPMF one-piece metal cone nozzle	KPMF-3_8.dxf	KPMF-3_8.pdf	KPMF-3_8.step
3/8" ED One-piece Metal Cone Spray	ED-3_8-metal.dxf	ED-3_8-metal.pdf	eductor-3_8-metal.step
3/4" ED one-piece plastic quick-release cone spray nozzle	ED-plastic-3_4.dxf	ED-plastic-3_4.pdf	3_4_ed.step
3/8" ED one-piece plastic quick-release cone spray nozzle	ED-3_8-plastic.dxf	ED-3_8-plastic.pdf	eductor-plastic-3_8.step
Mini ED one-piece metal cone nozzle	mini-ED.dxf	mini-ED.pdf	mini-ed.step

## Multi-piece Nozzle ### QZH Series

Type	2D dxf	2D PDF	3D Step
1/4" QZH H Plastic Quick Release Fan Nozzle	QZH-1_4.dxf	QZH-1_4.pdf	QZH_1_4.step
3/8" QZH H Plastic Quick Release Fan Nozzle	QZH-3_8.dxf	QZH-3_8.pdf	QZH_3_8.step

### QFYH Series

Type	2D dxf	2D PDF	3D Step
1/4" QFYH Plastic Quick Release Fan Nozzle	QFYH 1-4 body.dxf	QFYH 1-4 body.pdf	QFYH 1-4 body.step
1/8" QFYH Plastic Quick Release Fan Nozzle	QFYH 1-8 body.dxf	QFYH 1-8 body.pdf	QFYH 1-8 body.step
3/8" QFYH Plastic Quick Release Fan Nozzle	QFYH 3-8 body.dxf	QFYH 3-8 body.pdf	QFYH 3-8 body.step

### QFF QFMF Series

Type	2D dxf	2D PDF	3D Step
1/4" QFF Plastic Quick Release Fan Nozzle	qff_1_4.dxf	qff_1_4.pdf	qff_1_4.step
1/8" QFF Plastic Quick Release Fan Nozzle	qff_1_8.dxf	qff_1_8.pdf	qff_1_8.step
3/8" QFF Plastic Quick Release Fan Nozzle	qff_3_8.dxf	qff_3_8.pdf	qff_3_8.step

### QFH Series

Type	2D dxf	2D PDF	3D Step
1/4" QFH Plastic Quick Release Fan Nozzle	qfh_1_4.dxf	qfh_1_4.pdf	qfh_1_4.step
1/8" QFH Plastic Quick Release Fan Nozzle	qfh_1_8.dxf	qfh_1_8.pdf	qfh_1_8.step
3/8" QFH Plastic Quick Release Fan Nozzle	qfh_3_8.dxf	qfh_3_8.pdf	qfh_3_8.step

### QFYF QFYMF Series

Type	2D dxf	2D PDF	3D Step
1/4" QFYF QFYMF plastic quick release fan nozzle	1-4 QFYF QFYMF.dxf	1-4 QFYF QFYMF.pdf	1-4 QFYF QFYMF.step
1/8" QFYF QFYMF plastic quick release fan nozzle	QFYF QFYMF_1_8.dxf	QFYF QFYMF_1_8.pdf	QFYF QFYMF_1_8.step
3/8" QFYF QFYMF plastic quick release fan nozzle	QFYF QFYMF_3_8.dxf	QFYF QFYMF_3_8.pdf	QFYF QFYMF_3_8.step

# FU-ES ### Table of Contents *** * [⚠ Caution ](/qr/fu-es-echosense-instruction-manual/master) * [ Manual and Product Version](/qr/fu-es-echosense-instruction-manual/manual-version-2-0) * [Manual Revision History](/qr/fu-es-echosense-instruction-manual/manual-version-2-0/manual-revision-history) * [Firmware Version](broken://pages/98a1bfebb796ddbf7840eb80226b9d33a96c9f73) * [Measurement Principle and Design Applications](/qr/fu-es-echosense-instruction-manual/measure-principles-and-applications) * [Warranty](/qr/fu-es-echosense-instruction-manual/warranty) * [Product Appearance, Specifications, and Model](/qr/fu-es-echosense-instruction-manual/dimensions-specifications-and-model-numbers) * [Installation and Setup](/qr/fu-es-echosense-instruction-manual/installation-and-setup) * [Mechanical Installation](/qr/fu-es-echosense-instruction-manual/installation-and-setup/mechanical-installation) * [Electrical Installation](/qr/fu-es-echosense-instruction-manual/installation-and-setup/electronic-installation) * [Parameter Settings](/qr/fu-es-echosense-instruction-manual/installation-and-setup/parameter-setup) * [Human-Machine Interface (HMI)](/qr/fu-es-echosense-instruction-manual/user-interface) * [HMI Overview](/qr/fu-es-echosense-instruction-manual/user-interface/user-interface-explanation) * [Main Screen](/qr/fu-es-echosense-instruction-manual/user-interface/monitor-page-explanation) * [Simulation Mode](/qr/fu-es-echosense-instruction-manual/user-interface/mo-ni-mo-shi) * [Password Lock Function](/qr/fu-es-echosense-instruction-manual/user-interface/mi-ma-shu-ru-ye) * [Alarms and System Status](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status) * [Communication](/qr/fu-es-echosense-instruction-manual/communication) * [OCT Output](/qr/fu-es-echosense-instruction-manual/communication/oct-output-setup) * [Analog Output 4-20mA](/qr/fu-es-echosense-instruction-manual/communication/current-output) * [RS485 Modbus RTU](/qr/fu-es-echosense-instruction-manual/communication/rs485-setup) * [Modbus RTU Protocol](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol) * [Read-Only Memory (ROM)](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-only-memory-rom) * [Read/Write Memory (RAM)](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram) * [Single Bit Data Read/Write Commands (01 / 05)](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/single-bit-data-read-write-commands-01-05-common-for-hmi) * [Measurement Accuracy](/qr/fu-es-echosense-instruction-manual/measurement-accuracy) * [Parameters](/qr/fu-es-echosense-instruction-manual/parameters) * [Z Easy Setup](/qr/fu-es-echosense-instruction-manual/parameters/z-easy-setup) * [A Measurement Setup](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup) * [B Unit Setup](/qr/fu-es-echosense-instruction-manual/parameters/b-unit) * [K Calibration](/qr/fu-es-echosense-instruction-manual/parameters/k-calibration) * [C Total](/qr/fu-es-echosense-instruction-manual/parameters/c-total) * [D Alarm & Info](/qr/fu-es-echosense-instruction-manual/parameters/d-alarm-and-info) * [E Commute](/qr/fu-es-echosense-instruction-manual/parameters/e-commute) * [F Simulate](/qr/fu-es-echosense-instruction-manual/parameters/f-simulate) * [H System](/qr/fu-es-echosense-instruction-manual/parameters/h-system) * [Troubleshooting](/qr/fu-es-echosense-instruction-manual/troubleshooting) * [Certifications](/qr/fu-es-echosense-instruction-manual/certifications) # ⚠Caution ## CAUTION![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F1arEGWSURXbv4ibOcdDH%2Fcaution-icon.png?alt=media\&token=9f9e7823-16bb-4051-a74d-20b286a7793f) • Installation and safety compliance of the equipment system shall be the responsibility of the installer. • Conductors terminated to the M12 connector shall be copper wire sized 22 AWG – 12 AWG • The M12 connector coupling nut shall be tightened to 0.4 N·m – 0.6 N·m. • Product labels shall be cleaned periodically with a dry, lint-free cloth only. • Unused conductors shall be individually insulated with suitable insulating materials to prevent risk of electric shock, short circuit, or equipment damage. ## ATTENTION![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F1arEGWSURXbv4ibOcdDH%2Fcaution-icon.png?alt=media\&token=9f9e7823-16bb-4051-a74d-20b286a7793f) • L’installation et la conformité aux exigences de sécurité du système d’équipement incombent à l’installateur. • Les conducteurs raccordés au connecteur M12 doivent être en cuivre et de calibre 22 AWG à 12 AWG . • L’écrou de couplage du connecteur M12 doit être serré à un couple de 0,4 N·m à 0,6 N·m. • Les étiquettes du produit doivent être nettoyées régulièrement à l’aide d’un chiffon sec et non pelucheux. • Les conducteurs non utilisés doivent être individuellement isolés au moyen de matériaux isolants appropriés afin d’éviter tout risque de choc électrique, de court-circuit ou d’endommagement de l’équipement. ## Caution — Hot Surface![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F3UeGWLtOnVjqnZRJAbJp%2Fcaution-hot-surface-icon.png?alt=media\&token=b729d2c5-81f1-4e07-8c1e-621111f7e13e) During normal operation, the enclosure may reach temperatures capable of causing burns. Personnel shall allow the unit to cool before contact or wear suitable heat-resistant personal protective equipment (e.g., insulated gloves). Failure to observe this precaution may result in injury. ## Attention — Surface chaude![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F3UeGWLtOnVjqnZRJAbJp%2Fcaution-hot-surface-icon.png?alt=media\&token=b729d2c5-81f1-4e07-8c1e-621111f7e13e) En fonctionnement normal, le boîtier peut atteindre une température susceptible de provoquer des brûlures. Le personnel doit laisser l’appareil refroidir avant tout contact ou porter un équipement de protection individuelle résistant à la chaleur (par ex. gants isolants). Le non-respect de cette précaution peut entraîner des blessures. {% hint style="info" %} This product uses ultrasonic time-of-flight (ToF) in the forward and reverse directions to measure the flow on the outside of the pipe, so it is necessary to avoid bubbles, solid foreign matter, crystallization and sediments in the fluid. At the same time, try to avoid strong electromagnetic field interference near the device. The sensing system works on the principle of magnetic sensing, please avoid the interference of strong magnetic fields and ferromagnetic materials. Please cover the unused wires with insulating materials to avoid leakage, short circuit and damage of the device and be careful of electric shock. If the device is opened, please make sure that there is no foreign matter above the seal of the lower cover, and then lock all the screws evenly. Uneven force can cause damage to the mechanism. Unlocked or foreign objects on top of the seal will cause the waterproof and dustproof failure. Before wiring the motor and turning on the device, please confirm that the power is off. To avoid damage to electronic parts and electric shock leakage. Pressing the button for too long will cause the button to be damaged, please avoid it. After the warranty period, the electronic components of the product will be aged due to time and operating environment. After long-term use, please replace the new product according to the condition of the product. Do not operate the product for a long time with the LCD backlight showing orange and red lights to avoid product damage and related losses. Do not place the screen in direct sunlight or other UV light sources. {% endhint %} # Manual and Product Version ### Identifying the Product Version

H12 System Info	Startup Screen	Device Label
Access parameter H12 – System Info to verify the device model and main unit version. P1205: Device firmware version (identical to the version shown on the startup screen) D1205 and S1101: Hardware version 025: Device model (DN25 pipe size)	The startup screen is displayed for approximately three seconds after the flowmeter is powered on. LORRIC: Trademark FU-ES 025: Device model (DN25 pipe size) P1205 Device firmware version	A label is affixed to the flowmeter housing. FU-ES 025: Device model (DN25 pipe size) 22UD00433 Device serial number • Hardware 1.0/2.0 refers to the product's hardware version. Note: The label may become unreadable over time. It's recommended to record the serial number upon receipt.

H12 System Info

Startup Screen

Device Label

Access parameter H12 – System Info to verify the device model and main unit version.

P1205: Device firmware version (identical to the version shown on the startup screen)
D1205 and S1101: Hardware version
025: Device model (DN25 pipe size)

The startup screen is displayed for approximately three seconds after the flowmeter is powered on.

LORRIC: Trademark
FU-ES 025: Device model (DN25 pipe size)
P1205 Device firmware version

A label is affixed to the flowmeter housing.

FU-ES 025: Device model (DN25 pipe size)
22UD00433 Device serial number

• Hardware 1.0/2.0 refers to the product's hardware version.

Note: The label may become unreadable over time. It's recommended to record the serial number upon receipt.

## **System Number** {% hint style="info" %} Pxxxx + Dxxxx + Sxxxx + Pipe Size {% endhint %} #### Description 1. **P followed by numbers (Pxxxx)** * Device firmware version * *Example:* P1205 → Firmware version 1205 2. **D followed by numbers (Dxxxx) + S followed by numbers (Sxxxx)** * Hardware version * *Example:* D1205 S1101 → Hardware version D1205 S1101 3. **Pipe Size** * Numeric code (DN unit) * *Example:* 025 → DN25 Pipe diameter, 050 → DN50, 075 → DN75, etc. *** ## Online Manual Version Definition

{% hint style="info" %} Vxx.yy {% endhint %} #### **Description** 1. **Leading digits (xx) – Major Version** * Incremented with each major update or content revision. * *Example:* V01.00 → Major version 1.00 2. **Trailing digits (yy) – Minor Revision** * Incremented with minor corrections or small changes. * *Example:* V01.01 → Minor revision based on V01.00

Online Manual Version	Description
V01.00	Major Version – Initial release or major update
V01.01	Minor Revision – Minor adjustments or error corrections
V02.00	Major Version – Significant update

## **Definition of firmware version number** ## **We provide multi-language manuals** This manual is available in multiple languages. Manuals of the same version, regardless of language, correspond to the same hardware and firmware versions. # Manual Revision History ### **Last updated:** Mar 13, 2026 ### **Current version:** V02.00 {% updates format="full" %} {% update date="2026-03-13" %} ## V02.00

Updates

**New** * Added individual description pages for each parameter subcategory * Added a table of contents page **Improved** * Added content to the troubleshooting and fault diagnosis page * Added downloadable files to the certification page

{% endupdate %} {% update date="2024-09-02" %} ## V01.00

Updates

* **New Additions**: * Added a "Manual Update Log" page. * Added a "Product Update Record" page. * Added pages for category options and descriptions: Z. * Added pages for category options and descriptions: A. * Added pages for category options and descriptions: B. * Added pages for category options and descriptions: K. * Added pages for category options and descriptions: C. * Added pages for category options and descriptions: D. * Added pages for category options and descriptions: E. * Added pages for category options and descriptions: H. * Added a "Firmware P.1203 Update" page. * **Improvements**: * Corrected links on the product page. * Updated the page title and content for the "Manual and Product Update and Version Record" section. * Updated parameter table descriptions. * Revised product appearance, specifications, and model information. * **Fixes**: * Updated the default password setting for H08.

{% endupdate %} {% endupdates %} # Firmware Version {% updates format="full" %} {% update date="2026-02-26" %} ## Firmware Version: P1205 {% endupdate %} {% update date="2024-08-01" %} ## **Firmware Version: P1203**

Updates

* **Improvement I**: * Added the Hybrid1 main screen. * Enhanced Modbus RTU functionality for large numbers (dosing/totalizer) and support for int64 data format: * **Command 04**: Enables reading of int64 large numbers. * **Command 03**: Enables reading of int64-related configuration parameters. * **Command 31**: Introduced a new 64-bit parameter write command. Modbus RTU now supports data reading for dosing. * **Improvement II**: * Corrected default pipeline size string and improved cumulative precision when cumulative values are extremely large. * Fixed an issue where an incorrect password entry displayed abnormally on the main screen when the password feature was enabled. * Resolved a data error when the time unit for instantaneous flow rate was set to "day."

{% endupdate %} {% update date="2024-08-01" %} ## **Firmware Version: 1.202**

Updates

**Improvement**: * Added Modbus RTU commands 03, 06, and 30 to enable remote parameter configuration.

{% endupdate %} {% endupdates %} *** # Measurement principle and usage scenario This product incorporates technologies protected by multiple international patents. ## **Measurement Principle**

The LORRIC clamp-on ultrasonic flowmeter uses the **Time of Flight (ToF)** principle, measuring the travel time difference of ultrasonic waves upstream and downstream to calculate flow rate. Its **integrated clamp-on design** allows installation **without system shutdown**, avoids pipe damage, and provides **excellent chemical resistance and leak protection**. Unlike conventional clamp-on meters, **no probe distance calibration is required**, reducing installation time and training requirements. Due to pipeline dimensional tolerances, the system may show **small flow readings even when no fluid is moving**. This is normal and caused by physical measurement characteristics. {% hint style="info" %} Avoid fluids with large amounts of solids, bubbles, crystals, or sediment, which may interfere with ultrasonic measurement. Install the unit away from strong magnetic fields or electromagnetic interference. Ensure the fluid is in **fully developed flow** for accurate measurement. Follow installation guidelines for proper placement. {% endhint %} This product uses ultrasonic measurement, so it is necessary to avoid the interference of ultrasonic transmission caused by a large number of solid foreign objects, a large number of air bubbles, and crystals in the fluid. At the same time, try to avoid strong magnetic field interference near the device. {% hint style="info" %} **The ultrasonic flowmeter measures the flow correctly only when the fluid shows stable flow. Please choose the installation location according to the guidelines.** {% endhint %} # Warranty {% hint style="danger" %} This product uses ultrasonic time-of-flight (ToF) in the forward and reverse directions to measure the flow on the outside of the pipe, so it is necessary to avoid bubbles, solid foreign matter, crystallization and sediments in the fluid. At the same time, try to avoid strong electromagnetic field interference near the device. The sensing system works on the principle of magnetic sensing, please avoid the interference of strong magnetic fields and ferromagnetic materials. Please cover the unused wires with insulating materials to avoid leakage, short circuit and damage of the device and be careful of electric shock. If the device is opened, please make sure that there is no foreign matter above the seal of the lower cover, and then lock all the screws evenly. Uneven force can cause damage to the mechanism. Unlocked or foreign objects on top of the seal will cause the waterproof and dustproof failure. Before wiring the motor and turning on the device, please confirm that the power is off. To avoid damage to electronic parts and electric shock leakage. Pressing the button for too long will cause the button to be damaged, please avoid it. After the warranty period, the electronic components of the product will be aged due to time and operating environment. After long-term use, please replace the new product according to the condition of the product. Do not operate the product for a long time with the LCD backlight showing orange and red lights to avoid product damage and related losses. Do not place the screen in direct sunlight or other UV light sources. {% endhint %} {% hint style="info" %} ### **Measuring range and accuracy:** **Low flow rate (<1m/s) will have a large measurement error, please select the appropriate pipe diameter for installation.** {% endhint %} If not otherwise agreed, the warranty program of this product is as follows. Please confirm the condition of the product within 14 days after receiving it. If there are any defects caused during shipment, please contact the sales personnel for a product replacement. The product warranty is for 12 months from the delivery date. The warranty covers functional failures due to the non-human error and the non-specified environmental factors. During the warranty period, there will be no charge for product inspection, replacement of parts, or maintenance, etc. When the product needs to be shipped back for maintenance, the packaging must be in perfect condition to avoid any additional damage during shipping. This product warranty only covers normal use. Any special applications, abnormal and excessive use are not covered by this warranty. The failures under the following conditions shall not be covered by this warranty, and the expenses for inspection, parts, maintenance, etc. shall be charged accordingly: * Natural disasters: flood, fire, earthquake, lighting strike, typhoon, etc. * Human caused damages: scratch, falling, tenon fracture, beating, breaking and heavy hitting. * Human errors: use of inappropriate voltage, high humidity, water, stain, corrosion, loss, improper storage, etc. * Caused by other abnormal factors. The failure was caused by the unprecedented force of natural disasters. * Other abnormal factors: The damage caused by the installation, appending, expanding, modifying and repair of the product or using an unauthorized third party for parts. * Product aging under long-term UV exposure. # Product Appearance, Specifications, and Model ## **Exterior**

## **Exploded views**

## **Models & Dimensions**

Spec	A	B	C	D	E	F	G	H
FU-ES015	169.85	115	64	79	3	2.5	120.53	54
FU-ES020	169.85	115	64	79	3	2.5	124.02	54
FU-ES025	169.85	115	64	79	3	2.5	133.52	54
FU-ES032	169.85	115	64	79	3	2.5	143.02	54

Spec	A	B	C	D	E	F	G	H
FU-ES040	184.90	64	125.22	4	2.5	164.12	53.50	69.50
FU-ES050	184.90	64	125.30	4	2.5	178.12	53.50	69.50
FU-ES065	184.90	64	126.87	4	2.5	193.12	53.50	69.50
FU-ES075	184.90	64	128.55	4	2.5	207.12	53.50	69.50

## **Product Specifications** ### **1. Mechanical Specifications** | Installation method | Clamp-On | | ---------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- | | Maximum working temperature of pipe wall | 85°C (non-UL) | | Device working environment temperature | -10\~60°C (14\~140°F) (The higher the temperature of the fluid in the pipe, the lower the upper limit of the ambient temperature.) | | Applicable pipe size | DN15-75 (1/2" to 3") | | Power supply | DC 12V to 36V 200mA | | Response time | ≤0.5 to 1 s | | Ingress Protection | IP66\* | | Device Materials |

Plastics (PPS+GF, PC+GF, PA66+GF, PET, PMMA, Nylon)
Metals (304 Stainless Steel)
Electronic Components
Silicone

| \* **IP66 Rating**\ IP66 stands for Ingress Protection 66. The IP rating is a standard that classifies the degree of protection provided by an electrical enclosure against the intrusion of foreign objects. The format is IPXX, where XX represents two digits: the first digit indicates the level of protection against contact and solid foreign objects (dust protection), and the second digit indicates the level of protection against water ingress. A higher number indicates a higher level of protection. For IP66: the first 6 means complete protection against dust ingress; the second 6 means protection against powerful water jets without harmful effect. ### **2. Measurement Specifications**

量測相關規格
Measurement Principle	Ultrasonic Time of Flight（Time of Flight, ToF）
Applicable fluid	Clear, oil or chemicals with less impurities (<1%)
Flow Velocity Range**	Recommended: ±0.3 to 6.0 m/s, Measurable: ±0.1 to 8.0 m/s
Linearity	± 0.5 % FS (>0.3m/s)
Repeatability	± 0.4 %
OR tolerance	±3.0% RD (10%-100% F.S.) ±0.3% F.S. (0%-10% F.S.)**
Transient data	Instantaneous flow volume and flow velocity
Totalized data	Cumulative flow (optional positive, negative or net flow)

\*\* Measurement accuracy is calibrated under controlled laboratory conditions using clean water at room temperature with CNS UPVC piping. Actual results may vary depending on fluid properties, piping conditions, installation, and environmental factors. ### **3. Electrical Specifications** * #### **Power supply** | **Whole device power supply** | | | ----------------------------- | ------------------------------------------------------------- | | Working specification | 12V \~ 36V 200mA (4-20mA and RS485 current are not included.) | | Reverse voltage protection | **Yes** |
* #### **OCT output** | Power supply spec | 5V\~30V 200mA | | -------------------------- | ------------- | | Reverse voltage protection | Yes | | NPN connection | Yes | | PNP connection | Yes | | Maximum output frequency | 700Hz | | Overcurrent protection | 200mA |
* #### Analog output (4-20mA, 0-20mA)

Analog output (4-20mA, 0-20mA)
Wiring	3 wiring
Power supply	Device shares power with the main unit, no external power supply required.
Output range	0–20 mA or 4–20 mA (selectable)
Maximum output range (incl. error signal)	0~21.6 mA (0–20 mA mode) / 2.4~21.6 mA (4–20 mA mode)
Resolution	16-bit (0–24 mA physical range)
Response time	≤0.5 to 1s (matches display update rate)
Loop Resistance	1100 ohm @ 36V 600 ohm @ 24V 250 ohm @ 12V

* #### Digital communication Modbus RTU RS485 | Baud | 9600, 19200, 38400, 57600 | | ---------------- | ------------------------- | | Wiring | 2 wiring | | Nodes on the bus | 32 | ### **4. User Interface** | Language | English, Traditional Chinese, Simplified Chinese (Others customizable) | | ------------------- | ---------------------------------------------------------------------------------------------------------------------------- | | Unit | Metric: Liter, cubic meters, meters Imperial: foot, Cubic foot, Uk gallon, US gallon Time: second, minute, hour, day | | Display |

Double screen display :

Large 5-Digit LED, 16x3 3-Color Backlight LCD display

| | Display digits |

LED 5 Digits (4 digits when negative value)

LCD 10 Digits (Not including sign and decimal point)

| | Operation buttons | 4 Key touch buttons | | Wired communication | Self-powered Analog output 4-20mA (Device after HW1.3) Modbus RTU RS485 Two-line OCT switch signal (ship with 2 meter cable) | ## **Shipping Contents** Besides other agreed contents, our standard package contains: * FU-ES Device \* 1 * 2m 8 pin cable \* 1 * Quick starting manual \* 1

## **Size, material, model**

Parts	Material
Screws for top side housing	Stainless steel 304
Screen cover	PMMA
Whole housing without screen cover	PC+GF
Buttons	PET
2 meters long 8 pin cable with insulation cover	Nylon
Middle lid	PPS+GF
Lower lid	PPS+GF, Silicon
Buckle	PPS+GF, PA66+GF, Silicon, Stainless steel 304

# Installation and Setup ## **Important notice before installing** * Check if the version of your hardware and firmware device is consistent with the version of the instruction manual you will follow. To check the version of the manual, please go to [the version page](/qr/fu-es-echosense-instruction-manual/manual-version-2-0). * Make sure that your installation environment meets the standard requirements for flow volume monitoring. There should be a certain distance in front and after the location of the installed flowmeter. The correct location for the flowmeter should be facing up horizontally or vertically depending on the flow direction. * Confirm the pipe material and size before installation. # Mechanical Installation ### **Extremely** Important! Read Before Installation The following improper usage or installation practices may damage the flowmeter and reduce product lifespan. Such damage is **not covered under warranty**. * If the device material is PC then it is not highly resistant to PVC glue which is a strong gas and lubricant for PVC pipe. Therefore, before installing the flowmeter you must ensure that the glue is dry between the connecting pipe and adapter. * Please pay special attention to the vertical flow of solvents and chemicals outside the pipeline since it may potentially cause damage to the flowmeter * Do not use this device as a support point for pipelines or other objects, which will cause the flowmeter to withstand external forces which it is not designed for, thus , shortening the usage life of the product or damaging it. * During the installation process, it’s crucial to tighten the union nuts only by hand until the flowmeter does not move and rotate. Do not use iron pliers or other tools to avoid damage to the flowmeter. * The flowmeter is not permanently fixed to the outside of the pipeline, and can still move and rotate under excessive external force. Please do not use the flowmeter as a structure for personnel fixing, moving and safety protection. * The electronic device of the flowmeter is not UV resistant. Therefore, we suggest covering it with a protector if installed outdoors. * The seller will not be responsible for free maintenance for any defect or malfunction incurred by improper use and human errors. * If the flowmeter is transported with its piping system to another site without protection then it could be damaged. * The LCD display screen should not be exposed to direct sunlight that could cause visibility issues and a shorter life usage. Therefore, installing the flowmeter under direct sunlight should be avoided or with a sunlight protector is recommended. {% hint style="danger" %} **Caution – Do Not Over-Tighten:** During installation, tighten screws until snug. Once the screw feels slightly tightened, any additional tightening must not exceed **0.4 N·m (4.0 kgf·cm)** to avoid damage to the unit. For plastic tubing, ensure that excessive downward pressure does not cause deformation; reduce torque as necessary. {% endhint %} ## Installation Guide {% stepper %} {% step %} ### Selecting Installation Location * **Ensure Full Pipe:** Install the flowmeter on a fully filled vertical pipe segment. If installed on a horizontal pipe, avoid areas prone to air bubble accumulation (top of pipe) or sediment deposition (bottom of pipe). Presence of air bubbles may cause large, non-repeatable measurement errors. * **Install on Fully Developed Flow:** Mount the flowmeter on a pipe section with uniform, stable flow. Avoid locations near components that disturb flow, such as pipe reducers, elbows, valves, or pumps. * **Protect the Main Unit:** Do not expose the LCD directly to sunlight. If necessary, add a sunshade. Direct sunlight can reduce readability and shorten LCD lifespan. #### Straight Pipe Requirements – 10D / 5D Guideline To ensure stable and uniform flow for accurate measurement, install the flowmeter away from components that may disturb flow velocity. Follow these guidelines: * **Upstream (before the flowmeter):**\ Provide a minimum straight pipe length of 10 × pipe diameter (10D). Do not place elbows, tees, valves, reducers, expanders, pump outlets, or any component that may disturb the flow. * **Downstream (after the flowmeter):**\ Provide a minimum straight pipe length of 5 × pipe diameter (5D) to prevent downstream pressure fluctuations from affecting measurement stability. * **Installation Direction:**\ Align the flowmeter according to the flow direction arrow on the housing. Ensure it matches the actual flow direction.

``` Example: Straight Pipe Lengths for DN25 (25 mm Nominal Diameter) Pipe Diameter (D): 25 mm Upstream Straight Pipe: 10 × D = 10 × 25 mm = 250 mm (~25 cm) Downstream Straight Pipe: 5 × D = 5 × 25 mm = 125 mm (~12.5 cm) ``` **Additional Recommendations** * For sites near pumps, strong pulsations, or multiple upstream/downstream fittings, increase upstream straight pipe to 15–20 × D or use a flow conditioner. **Avoid Installing the Flowmeter Near:** | | | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Near Pumps | Near Valves | |

| {% endstep %} {% step %} ### Installation Orientation & Flow Direction #### Installation Orientation * Vertical Pipe: Install the flowmeter on upward flow. * Horizontal Pipe: Install at a fully filled section, e.g., the lower side of a sloped pipe or the bottom of a U-shaped pipe. |

| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | *** **Flowmeter Orientation** Install the flowmeter on the side, slightly above, or slightly below the pipe. Avoid the top or bottom to prevent interference from bubbles or sediment. * **Recommended Positions: Side, Slanted Upward, Slanted Downward**

* **Avoid:** Right Above or Right Beneath

{% endstep %} {% step %} ### FU-ES Device Installation Steps {% hint style="danger" %} #### **Caution – Do Not Over-Tighten:** Tighten screws until snug. Maximum torque **0.4 N·m (4.0 kgf·cm)**. Excess torque may damage the flowmeter. ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FLVXwyNK1astUP1qkO9wM%2Ffu-es-screw.png?alt=media\&token=565ec82a-85ad-4886-911b-c3e2497040cf) **Screw Identification** 🔴 **Side cover fixing screws:** Marked in red. Do not rotate during normal installation. Avoid turning unless necessary. 🔵 **Sensor Pressing Screws:** Marked in blue. Adjust sensor contact tightness with the pipe. 🟢 **Hex socket screws:** Marked in green. Secure the upper and lower clamps to the pipe. {% endhint %} ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FHJnPV8pgaG6ayC88BJoT%2FFU-ES-english-installation%20.jpg?alt=media\&token=d2451ee2-c28a-402b-8bcd-9f5bec72461a) {% endstep %} {% step %} ### How to Rotate the Display Screen Direction

{% stepper %} {% step %} ### Power off and remove the power cable Before opening the housing or performing any wiring work, turn off the power and remove the power cable. {% endstep %} {% step %} ### Loosen the housing cover screws and separate the top and bottom covers Using a hex key, loosen the **4 housing cover screws** and separate the top cover from the bottom cover. Multiple wires connect the top cover to the housing — carefully detach the covers and **do not pull the wires**. {% endstep %} {% step %} ### Rotate the housing to the desired orientation Rotate the top cover to the required angle. **Do not rotate more than one full turn**, as excessive rotation places unnecessary tension on the wires and connectors, which may affect long-term reliability. {% endstep %} {% step %} ### Reassemble the covers and tighten the screws The bottom cover has a sealing O-ring seated in the groove around the screw holes. Confirm that the groove is free of debris to ensure waterproofing is not compromised. Reattach the top cover to the bottom cover and evenly tighten the **4 housing cover screws**. {% hint style="danger" %} Do not overtighten. Excessive torque may damage the product. {% endhint %} {% endstep %} {% endstepper %} {% endstep %} {% endstepper %} # Electrical Installation {% hint style="danger" %} **Safety First:** Do not perform wiring while the unit is powered on. Before any wiring work, turn off the power and disconnect the power supply. {% endhint %} {% hint style="danger" %} **CRITICAL WARNING**: **Do not apply overvoltage to communication lines**\ The Modbus RS-485 communication lines (A/B) have a maximum rated voltage of typically 5 V. They must never be connected to or share continuity with the flowmeter's DC 24 V power lines. Incorrect wiring will instantly destroy the internal core components of the flowmeter. Damage caused by wiring errors is not covered under warranty. Always verify all wiring with a multimeter before powering on the device. {% endhint %} ## M12 8-Pin Quick Connector Pin Definition * Connect the supplied cable to the power supply and the required communication interfaces. * Unused wires must be insulated with protective material to prevent electric leakage or short circuits. * Before opening the unit or performing any wiring, turn off the power and disconnect the power supply. * Due to space limitations, the label on the side of the unit and the following diagrams show wire pin definitions only. The M12 8-pin quick connector wire color assignments are defined as follows: ![Cable Pin Map](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F3cTdYR3PxAQAd8WhHoLj%2FFU-ES-pin.png?alt=media\&token=6fec7472-b00a-45ac-bf97-7e66d0b0ae66) | Number | Color | Function | | ------------- | ---------------------------- | --------------------------------------------------- | | 1 | Black | RS485 (B-) | | 2 | Yellow | OCT output (-) | | 3 | Blue | VDC (-) | | 4 | Orange | OCT output (+) | | 5 | Green | RS485 (A+) | | 6 | Purple | 4\~20mA (+) | | 7 | Red | 4\~20mA (-) | | 8 | Brown | 12-36 VDC (+) | | Shielding net | White heat-shrinkable sleeve | (optional) Shielding net, please connect to ground. | ### DC Power Wiring Diagram * **Brown Wire:** 12–36 VDC (+) * **Blue Wire:** VDC (–)

### 4–20 mA Analog Output Wiring Diagram * **Brown Wire:** 12–36 VDC (+) * **Blue Wire:** VDC (–) * **Purple Wire:** 4–20 mA (+) * **Red Wire:** 4–20 mA (–) {% hint style="info" %} This function requires the brown and blue DC power wires to be powered. The following diagram is not showing power supply wiring for readability. {% endhint %}

### **OCT NPN Output Wiring Diagram** {% hint style="info" %} This function requires the brown and blue DC power wires to be powered. The DC power wiring is omitted from this diagram for readability. See the [DC Power Wiring Diagram](#dc-power-wiring-diagram) for details. {% endhint %}

### **OCT PNP Output Wiring Diagram** * **Brown Wire**: 24 VDC (+) * **Blue Wire**: 0 VDC (–) * **Orange Wire**: OCT Output (+) * **Yellow Wire**: OCT Output (–) {% hint style="info" %} This function requires the brown and blue DC power wires to be powered. The DC power wiring is omitted from this diagram for readability. See the [DC Power Wiring Diagram](#dc-power-wiring-diagram) for details. {% endhint %}

### **RS485 Two-Wire Wiring Diagram** * **Black Wire**: RS-485 B (–) * **Green Wire**: RS-485 A (+) {% hint style="info" %} This function requires the brown and blue DC power wires to be energized. The DC power wiring is omitted from this diagram for readability. See the [DC Power Wiring Diagram](#dc-power-wiring-diagram) for details. {% endhint %}

{% hint style="info" %} ### RS-485 Wiring Recommendations 1. It is recommended to use **shielded 24 AWG twisted-pair cable** and connect devices in a **daisy-chain configuration**. Do not use star or ring wiring. 2. For long cable runs, install **termination resistors** at both the master and the farthest device. A typical value is **120 Ω**, but the actual value should be calculated based on the cable specifications. 3. If signal instability occurs, consider adding **bias resistors** at a point along the line. 4. The 8-core cable is shipped with the device, if used in RS485 communication, please trim the length, try to use a short wire to reduce noise interference. Connect the shielding net to the main communication wire shielding and then ground it. 5. In areas with heavy signal interference, the software may need to **poll multiple times** to receive a response. Implement a **repeated polling mechanism** in the communication program to distinguish between signal interference and actual device offline conditions. {% endhint %} *** ## **Device Pin Definitions** Due to space constraints, the sticker on the side of the device only uses cable contact definitions.\ The number of the device contact and the cable contact is mirrored and symmetrical.\ Please see below device contact number: ![Device pin map](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LxeY3bBEflHg4JOGyfX%2F-MCp1RCM6Vv99ZbZ012s%2F-MCpOIzv4LyKF4_jFhjb%2Fpin%20map%20device.jpg?alt=media\&token=b390b44c-ed99-40c8-b3b1-7f2222f205de) # Parameter Settings ### Setup Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

**Orange Button (rightmost):** Rightmost button: Enter settings, edit, or confirm selection {% hint style="danger" %} **Do not hold buttons for extended periods to avoid damage.** {% endhint %} {% hint style="info" %} Button functions may change depending on the operation context to improve usability or prevent accidental presses. {% endhint %}

{% stepper %} {% step %} ### Language Settings The default language is English. The unit supports English, Traditional Chinese, and Simplified Chinese. To change the language, go to [H04 Language.](https://docs.lorric.com/qr/fu-es-echosense-instruction-manual/~/revisions/PCTqj0je6sm5W41rmtRo/parameters/h-system/h04-language) ``` H04 Language Setting Steps - From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). - Use Gray Arrow Buttons to select H.System, press Orange Button (Enter). - Select H04 Language, press Orange Button (Enter). - Choose language, press Orange Button (Set) to confirm. - Press Blue Button (ESC) to return to main screen. ```

{% endstep %} {% step %} ### Pipe Setting #### Easy Setup: Z02 Auto Pipe Spec Using patented sensing technology, the [**Z02**](/qr/fu-es-echosense-instruction-manual/parameters/z-easy-setup/z02-auto-pipe-spec) measures the pipe dimensions and automatically selects the closest matching pipe specification from the internal database. If the measured size does not match any standard specification (e.g., due to pipe deformation or an unsupported pipe type), the system will apply a **default pipe specification** as the pipe size setting. See [**A02** ](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup/a02-preset-pipe-spec)for reference. {% hint style="danger" %} * Due to tolerances or other factors, the matching result **may be incorrect**, which can affect measurement accuracy. **Always verify the result after running Z02**. * The default A02 setting is **CNS UPVC**. If you are using a metal pipe or any non-UPVC pipe material, verify and update A02 after running Z02 to ensure accurate measurement. {% endhint %} ``` Z02 Auto Pipe Spec Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select Z. Easy Setup, press Orange Button (Enter). • Use Gray Arrow Buttons to select Z02 Auto Pipe Spec, press Orange Button (Enter). • Press Right Gray Button to start Auto Pipe Spec. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

{% hint style="warning" %} If your pipe is not listed in the database, or if the pipe size does not match correctly after using Z02, configure the pipe settings manually instead *(refer to below)* {% endhint %}

Manual Pipe Setting Steps (Click to Expand)

Complete settings in order: **A02**, **A04**, **A06**, **A08**. #### A02 Present Pipe Spec Select the pipe spec according to the installed pipeline. If no match is available, choose **Custom** and set outer diameter, wall thickness, and material in A04, A06, and A08. If a standard spec is chosen, these values will be applied automatically. Specifications may vary by model; please refer to A02 Present Pipe Spec.

A02 Present Pipe Spec Setting Steps
- From the main screen (green backlight),
  press Orange Button (Setup) to enter settings (orange backlight).
- Use Gray Arrow Buttons to select A.Measurement, press Orange Button (Enter).
- Select A02 Present Pipe Spec, press Orange Button (Enter).
- Choose pipe spec, press Orange Button (Set) to confirm.
- Press Blue Button (ESC) to return to main screen (green backlight).

#### A04 Pipe Outer Diameter Set the pipe outer diameter by adjusting each digit individually. Press Left Gray Button to increase a digit and Right Gray Button to decrease it. After setting a digit, press Orange Button (Set) to confirm before adjusting the next digit. Please refer to [A04 Pipe Outer Diameter](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup/a04-pipe-outer-diameter). ``` A04 Pipe Outer Diameter Setting Steps - From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). - Use Gray Arrow Buttons to select A.Measurement, press Orange Button (Enter). - Use Gray Arrow Buttons to select A04 Pipe Outer Diameter, press Orange Button (Enter). - Use Gray Arrow Buttons to choose the digit to adjust (highlighted in dark gray). - Press Orange Button (Edit) to enter adjustment mode. - Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. - Press Orange Button (Set) to confirm each digit; repeat for other digits as needed. - After all digits are set, press Blue Button (Save). Confirm by pressing Orange Button (Save) (or Blue Button (NOT) to cancel). - Press Blue Button (ESC) to return to the main screen (green backlight). ```

#### A06 Pipe Thickness Set the pipe wall thickness. Each digit can be adjusted individually. Use Left Gray Button to increase and Right Gray Button to decrease each digit. Please refer to [A06 Pipe thickness](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup/a06-pipe-thickness) ``` A06 Pipe Thickness Setting Steps - From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). - Use Gray Arrow Buttons to select A.Measurement, press Orange Button (Enter). - Use Gray Arrow Buttons to select A06 Pipe Thickness, press Orange Button (Enter). - Use Gray Arrow Buttons to choose the digit to adjust (highlighted in dark gray). - Press Orange Button (Edit) to enter adjustment mode. - Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. - Press Orange Button (Set) to confirm each digit; repeat for other digits as needed. - After all digits are set, press Blue Button (Save). Confirm by pressing Orange Button (Save) (or Blue Button (NOT) to cancel). - Press Blue Button (ESC) to return to the main screen (green backlight). ```

#### A08 Pipe Material Set the pipe material. If no matching option is available, select **custom**. Please refer to [A08 Pipe Material.](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup/a08-pipe-material)

A08 Pipe Material Setting Steps
- From the main screen (green backlight),
  press Orange Button (Setup) to enter settings (orange backlight).
- Use Gray Arrow Buttons to select A.Measurement, press Orange Button (Enter).
- Use Gray Arrow Buttons to select A08 Pipe Material,
  press Orange Button (Enter).
- Use Gray Arrow Buttons to choose the pipe material.
  If no matching option is listed, select custom.
- Press Orange Button (Set) to confirm.
- Press Blue Button (ESC) to return to the main screen (green backlight).

{% hint style="info" %} Plastic and metal pipes have significantly different physical properties. Selecting the wrong material may cause substantial measurement errors. {% endhint %}

| A08 Available Pipe Materials： | | ----------------------------------------------------------------------- | | custom（default）、PE、PFA、Copper、SUS316、SUS304、Steel、ABS、PVDF、PP、PVC、PVCU |

{% endstep %} {% step %} ### Fluid Sound Velocity Setting After completing the pipe settings, ensure the pipe is fully filled and run **Z03 Auto Initialize**. The flowmeter will automatically detect the ultrasonic sound velocity of the measured fluid and configure the operating parameters accordingly. Refer to: [Z03 Auto Initialize.](/qr/fu-es-echosense-instruction-manual/parameters/z-easy-setup/z03-auto-initialize) {% hint style="danger" %} Z03 must be executed with the**「Pipe Fully Filled」**(whether the fluid is flowing or stationary does not affect the result.) Running it when not full will cause measurement errors and value fluctuations.\ If this happens, re-run Z03 under full-pipe conditions. {% endhint %} ``` Z03 Auto Initialize Setting Steps - From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). - Use Gray Arrow Buttons to select Z.Easy Setup, press Orange Button (Enter). - Use Gray Arrow Buttons to select Z03 Auto Initialize, press Orange Button (Enter). - Press the right gray Start button to begin automatic initialization. - After completion, press Blue Button (ESC) to return to the main screen (green backlight). ```

{% hint style="warning" %} If Z03 cannot complete successfully, or if you need to enter a known fluid sound velocity value directly, configure this settings manually instead *(refer to below)* {% endhint %}

Manual Fluid Sound Velocity Setting (Click to Expand)

Complete settings in order: **A10**, **A12.** #### A10 Liquid Type Set the liquid type. Default: custom. ``` A10 Liquid Type Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement , press Orange Button (Enter). • Use Gray Arrow Buttons to select A10 Liquid Type, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

#### A12 Liquid Soundspeed Set the liquid Soundspeed. Default: 1482. {% hint style="info" %} * The sound speed of a fluid varies with temperature. Please refer to the [**Liquid Temperature vs. Sound Speed Reference Table**](https://www.lorric.com/en/Articles/Industrial-database/all/sound-speeds-data-liquid). * When the user sets **A10 (Fluid Type)**, **A12 (Fluid Sound Speed)** will be updated accordingly based on the A10 selection. * The unit of **A12** is determined by **B04 (Flow and Sound Speed Unit)**. {% endhint %} ``` A12 Liquid Soundspeed Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A12 Liquid Soundspeed, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

{% endstep %} {% step %} ### Main Screen Status Check After setup, return to the main screen. If settings are correct, the flow rate will be displayed. Check the flow signal indicator at the lower-left corner: * **1 bar:** Poor signal quality * **< 1 bar:** Possible air bubbles or interference; **"Noisy"** may appear If the signal is low, adjust the sensor installation according to the mounting guidelines and check whether the signal improves.

{% endstep %} {% endstepper %} ## Troubleshooting If any of the following issues occur during installation or setup, adjust the system as instructed. #### 1. Rapid Fluctuating Readings If flow readings fluctuate rapidly, adjust **A15 Damping** to reduce data swings. The default damping value is 3; higher values reduce fluctuations. Set according to desired measurement stability and response speed. Refer to [A15 Damping.](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup/a15-damping) #### 2. No Zero at Zero Flow Go to **A18 Low Flow Cutoff** to configure forced zero. Purpose: * Prevents false flow readings caused by signal drift at zero flow. Parameter Description: * A18 = **0 (default):** Shows all very low flows; suitable for applications requiring detection of tiny flow. * A18 = **X (user-defined):** Forces the reading to zero when flow < X. Recommended Setting: * For non-low-flow applications, set an appropriate cutoff value to improve zero stability and prevent flow display during stoppage. * Refer to model-specific lower limit suggestions below.

FU-ES	015	020	025	032	040	050	065	075
Recommended Lower Limit	1.5 LPM	2 LPM	3 LPM	5 LPM	8 LPM	13 LPM	22 LPM	30 LPM

Refer to A18 [Low Flow Cutoff.](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup/a18-low-flow-cutoff) #### 3. Incorrect Positive/Negative Sign Display If the flowmeter shows the wrong sign, adjust the detection direction in **A16 Direction**. \ Refer to [A16 Direction.](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup/a16-direction) #### 4. Unit Adjustment To change the display unit, go to **B Unit**. Refer to [B Unit.](/qr/fu-es-echosense-instruction-manual/parameters/b-unit) {% hint style="info" %} ### Advanced Calibration Settings Refer to the full parameter table for detailed settings. See: [Full Parameter Reference.](/qr/fu-es-echosense-instruction-manual/parameters) {% endhint %} # Human Machine Interface (HMI) # HMI Overview ### Main Unit Functions The FU-ES features a dual-screen display: * A **5-digit LED display** for high-contrast real-time data readout * A **3-row, 3-color backlit LCD screen** for detailed data, page names, units, and button labels * Line 1: Current page name and units * Line 2: Actual measured data * Line 3: Available key functions for the current screen

### **Button Functions** The main unit has four buttons. The bottom line of the LCD, Line 3, shows the function of each button. The buttons are typically defined as follows:

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

### **LCD Three-Color Backlight Function**

The system provides a three-color backlight display. The **red backlight** only activates when the alarm setting is **“On”**. If the setting is **“DND (Do Not Disturb)”** or **“Off”**, the backlight remains off. The meanings of each color are as follows: {% stepper %} {% step %} ### **Green Backlight** * System operating normally * Displaying real-time information * All data within normal range {% endstep %} {% step %} ### **Flashing Red Backlight** * Major abnormality (**Alarm A**) detected * Refer to [**Alarms and System Status**](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status) for more information {% endstep %} {% step %} ### **Red Backlight** * **Alarm B:** User-defined alert condition triggered * **Alarm C:** Maintenance reminder condition reached * Refer to [**Alarms and System Status**](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status) for more information {% endstep %} {% step %} ### **Orange Backlight** * System operating normally * Display is currently on the **Settings page**, not a real-time information screen {% endstep %} {% endstepper %} {% hint style="info" %} #### **DND (Do Not Disturb) Mode** * System detects abnormalities, but **red backlight remains off**. * Example: **Alarm-A “4 Off Pipe”** triggers no backlight. * Abnormalities still appear on the **Abnormalities page**. * **RS485** connection still sends alarm signals. * **OCT output** continues to signal alarms if configured. {% endhint %} *** ## **Frequency of data update** Because real-time flow data updates frequently, the LED screen updates before the LCD screen. The difference between the two displays may be about 0.1 seconds. If the value has only a few digits, use the LED screen as the primary reference. ## **Displayed digits on LED screen** The LED screen displays up to five digits. If the value exceeds five digits, **FFFFF** appears on the LED screen, as shown below. To read the complete value, change the units or check the second row of the LCD screen.

**When flow is reversed and the value is negative, the first digit is a minus sign and the remaining four positions show the value.** # Main Screen

Table of Contents

[#screen-1-flowrate](#screen-1-flowrate "mention") [#screen-2-hybrid1](#screen-2-hybrid1 "mention") [#screen-3-status-page](#screen-3-status-page "mention") [#screen-4-dosing](#screen-4-dosing "mention") [#id-5-total-less-than-large-greater-than](#id-5-total-less-than-large-greater-than "mention") [#screen-6-velocity](#screen-6-velocity "mention") [#screen-7-flowrate-less-than-large-greater-than](#screen-7-flowrate-less-than-large-greater-than "mention") [#screen-8-total](#screen-8-total "mention") [#screen-9-velocity](#screen-9-velocity "mention") [#debug-screens](#debug-screens "mention") [#h09-home-page-setting](#h09-home-page-setting "mention")

The FU-ES features **nine main screens**. The **H09 Home Page** function lets you select which screen is displayed at startup. [Detailed H09 instructions](#h09-home-page-setting) are provided at the end of this section.\ Two debug screens are also available when [H10](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h10-debug-page) is enabled. The FU-ES display consists of an upper **LED display** and a lower **LCD display**. The LED display shows real-time flow data (up to five digits). The LCD display changes content according to the main screen selected.

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button:** Leftmost button: Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous page, decrease a value, or select an item. *

**Right Gray:** Next page, increase a value, or select an item. *

**Orange Button (rightmost):** Enter settings, edit, or confirm selection. ## Main Screen Menu ### Screen 1: Flowrate Displays instant flowrate.\ The LED display shows data up to five digits. The first line of the LCD shows the flow unit **(L/m)**, the second line shows **Instant Flowrate**, and the third line shows the flow signal on the lower left and **Setup** on the lower right. Press the orange button to open the **Settings screen**.

{% hint style="info" %} A single-bar signal indicates a poor measurement environment. A reading below one bar may be caused by air bubbles or other interference. When the signal drops below one bar, **Noisy** is typically displayed. Adjust the pipe according to the installation instructions to improve the signal. {% endhint %} ### Screen 2: Velocity Displays flow velocity.\ The LED display shows data up to five digits. The first line of the LCD shows the velocity unit (**m/s**), the second line displays **Velocity**, and the third line shows the flow signal on the lower left and **Setup** on the lower right. Press the orange button to open the **Settings screen**. Velocity units can be adjusted in [B04 Velocity Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b04-velocityunit).

### Screen 3: Total Displays total accumulated flow.\ The LED display shows data up to five digits. The first line of the LCD shows the total flow unit (**L**), the second line displays **Total Flow**, and the third line shows the flow signal on the lower left and **Setup** on the lower right. Press the orange button to open the **Settings screen**. Total flow units can be adjusted in [B03 Total Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b03-total-unit).

{% hint style="info" %} Flow in Simulation Mode is also included in the total flow. {% endhint %} ### Screen 4: Flowrate \ Displays instant flowrate with enlarged digits for easy viewing.\ The LED display shows data up to five digits. The large LCD digits show the flowrate, and the lower right displays the unit (**L/m**). Pressing the orange button at the lower right opens the **Settings screen**. Flow units can be adjusted in [B01 Vol. Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b01-vol.unit) and [B02 Time Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b02-time-unit).

### Screen 5: Velocity \ Displays flow velocity with enlarged digits for easy viewing.\ The LED display shows data up to five digits. The large LCD digits show the velocity, and the lower right displays the unit (**m/s**). Pressing the orange button at the lower right opens the **Settings screen**. Velocity units can be adjusted in [B04 Velocity Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b04-velocityunit).

### Screen 6: Total \ Displays total flow with enlarged digits for easy viewing.\ The LED display shows data up to five digits. The large LCD digits show **Total Flow**. **POS** at the bottom indicates forward direction, and the lower right shows the flow unit (**L**). Pressing the orange button at the lower right opens the **Settings screen**. The total calculation method can be adjusted in [C01 Total Method](/qr/fu-es-echosense-instruction-manual/parameters/c-total/c01-total-method): **POS** (Forward), **NET** (Net), or **NEG** (Reverse). Total flow units can be adjusted in [B03 Total Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b03-total-unit).

{% hint style="info" %} Flow in Simulation Mode is also included in the total accumulated flow. {% endhint %} ### Screen 7: Dosing Used for batch or quantitative control (**Dosing**).\ The LED display shows data up to five digits. The first line of the LCD shows the **Dosing Reset Time**, the second line shows **Total Flow**, and the third line shows the flow signal on the lower left and **Setup** on the lower right. Press the orange button to open the **Settings screen**. The dosing reset time can be adjusted in [C05 Dosing Reset Time](/qr/fu-es-echosense-instruction-manual/parameters/c-total/c05-dosing-reset-time), and total flow units can be adjusted in [B03 Total Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b03-total-unit).

### Screen 8: Status Page Displays system status and diagnostics, including **Alarm A, B, and C codes** and the system **S code**.\ A red flowmeter indicator signals a problem that requires attention. Switch to this screen to confirm flowmeter abnormalities. For details, refer to the [Alarms and System Status](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status) section.

{% hint style="info" %} Record a video or take a photo of this page for factory verification if an issue occurs. {% endhint %} ### Debug Screens Two additional debug screens are available when [**H10**](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h10-debug-page) is enabled. These screens are intended for diagnostics and factory troubleshooting.

{% hint style="info" %} If a problem occurs, record a video or take a photo of these screens for factory confirmation. {% endhint %} ### Screen 9: Hybrid1 The Hybrid1 screen displays **Instant Flowrate** and **Total Flow** at the same time.\ The LED display shows data up to five digits. The first line of the LCD shows **Instant Flowrate**, the second line shows **Total Flow**, and the third line shows the flow signal on the lower left and **Setup** on the lower right. Press the orange button to open the **Settings screen**. Instant flow units can be adjusted in [B01 Vol. Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b01-vol.unit) and [B02 Time Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b02-time-unit), while total flow units can be adjusted in [B03 Total Unit](/qr/fu-es-echosense-instruction-manual/parameters/b-unit/b03-total-unit). {% hint style="info" %} The **Hybrid1** home screen is available from **firmware version P1203 onward**. {% endhint %}

### H09 Home Page Setting The [**H09 Home Page**](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h09-home-page) parameter allows you to select which screen is displayed at startup.

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` H09 Home Page Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select H. System, then press Orange Button (Enter). • Use Gray Arrow Buttons to select H09 Home Page, then press Orange Button (Enter). • Use Gray Arrow Buttons to choose an option. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

# Simulation Mode Simulation Mode is disabled by default. When enabled, the flow setting displays the value defined in **F01 Sim. Volume**. In this mode, **OCT** output, excluding pulses, **RS485**, and analog current outputs respond to the simulated data, allowing output verification. {% hint style="danger" %} * Enabling **Simulation Mode** may change historical total flow. The main screen turns **orange**, and the relevant communication outputs must be active. * When using 4–20 mA wiring, ensure that **E06 Iout Def.** is enabled so data can be displayed. {% endhint %}

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Simulation Mode Instructions (Click to Expand)

> **Simulation Mode** outputs simulated flow values for testing communication and signals. Related parameters include **F01 Sim. Volume** and **F02 Sim. Mode**, plus additional settings based on the communication type: > > * **4–20 mA:** **E06 Iout Def.** > * **NPN Pulse:** **E01 NO/NC**, **E02 OCT Definition** > * **RS485:** **E04 Modbus ID**, **E05 Baud Rate** {% stepper %} {% step %} ### F02 Turning on Simulation Mode

``` F02 Sim. Mode Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select F. Simulate , press Orange Button (Enter). • Use Gray Arrow Buttons to select F02 Sim. Mode, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ``` {% endstep %} {% step %} ### F01 Simulated Flow Setting Procedure ``` F01 Sim. Volume Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select F. Simulate, press Orange Button(Enter). • Use Gray Arrow Buttons to select F01 Sim. Volume, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

{% endstep %} {% step %} ### **Communication-Based Parameter Settings** #### For 4–20 mA Wiring, Enable E06 Analog Output Definition

``` E06 Iout Def. Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select E. Commute , press Orange Button (Enter). • Use Gray Arrow Buttons to select E06 Iout Def., press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ``` #### For NPN Wiring, Enable E01 NO/NC and E02 OCT Definition

``` E01 NC/NO and E02 OCT Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select E. Commute, press Orange Button (Enter). • Use Gray Arrow Buttons to select E01 NC/NO, press Orange Button (Enter). • Choose the options NC/NO, press Orange Button (Set). • The screen returns automatically to E. Commute. • Use Gray Arrow Buttons to select E02 OCT Info, press Orange Button (Enter). • Press Blue Button (ESC) to return to the main screen. (orange backlight indicates Simulation Mode is active) • Verify at the receiving end that the corresponding OCT signal is output correctly. ``` ### **For RS485 Wiring, Enable E04 Modbus ID and E05 Baud Rate.** ``` E04 Modbus ID and E05 Baud Rate Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select E. Commute, press Orange Button (Enter). • Use Gray Arrow Buttons to select E04 Modbus ID, press Orange Button (Enter). • Use Gray Arrow Buttons to adjust the Modbus ID, press Orange Button (Set). • The screen returns automatically to E. Commute. • Use Gray Arrow Buttons to select E05 Baud Rate, press Orange Button (Enter). • Choose the options, press Orange Button (Set). (Options: Off, 57600, 38400, 19200, 9600) • Press Blue Button (ESC) to return to the main screen. (orange backlight indicates Simulation Mode is active) • Verify at the receiving end that the corresponding OCT signal is output correctly. ``` | E04 Modbus ID | E05 Baud Rate | | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | | ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FtaXK0Tb9iblpiwnMg7rn%2Ffu-es-E04-en.png?alt=media\&token=049e8587-6b21-48a4-a8d6-bc9a555d6daa) | ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2Ffqpf2F8mQ023xJXoOmCo%2Ffu-es-E05-en.png?alt=media\&token=58b10992-f1ec-4bf1-93e6-dc18a564f099) | {% endstep %} {% step %} ### **F02 Simulation Mode (Turn Off After Testing)** If communication is normal, return to **F02 Simulation Mode** and turn it **off**. The main screen will return to **green backlight**. {% endstep %} {% endstepper %}

# Password Lock Functions The password lock is **disabled by default**. To enable it, set [H07 Lock Device](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h07-lock-device) to **On**. The default password is **4321**. To change the password, use [H08 Password](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h08-password). Once enabled, entering the **Settings screen** from the main screen requires a password.

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Password Lock Function (Click to Expand)

> The password lock function restricts access to parameters and prevents unauthorized or accidental setting changes. > > The relevant parameters are [H07 Lock Device](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h07-lock-device) and [H08 Password](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h08-password). {% stepper %} {% step %} ### H07 Lock Device (Enable/Disable) ``` • H07 Lock Device Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select H. System , press Orange Button (Enter). • Use Gray Arrow Buttons to select H07 Lock Device, press Orange Button (Enter). • Use Gray Arrow Buttons to choose "ON". • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

{% endstep %} {% step %} ### **H08 Password Setting** After enabling **H07 Password Lock**, the default password is **4321**. To change the password, use **H08 Password**.

``` H08 Password Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select H. System , press Orange Button (Enter). • Use Gray Arrow Buttons to select H08 Lock Device, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(SAVE) to confirm each digit • After all digits are set, press Blue Button(Save). • Press Blue Button(ESC) to return to the main screen(green backlight). ``` {% endstep %} {% step %} ### **Locked Screen** When the password lock is enabled, entering the **Settings screen** from the main screen will display the **Password Entry screen**.

Password Entry Screen Instructions:

``` • Use the gray direction keys to select the digit to adjust • Press orange Edit to start entering the password. • Adjust the digit: press the left gray key to increase, the right gray key to decrease. • After entering the correct password, • Press the Blue Button (Check) to access the Settings screen. • If the password is incorrect, the system will return to the main screen. ``` {% hint style="info" %} ## Incorrect Password & Reset Incorrect Password Attempts: No limit\ Forgotten Password: Contact LORRIC to obtain the master reset password. {% endhint %} {% endstep %} {% endstepper %}

# Alarms and System Status ## Alarm A - Critical Failure The system error level follows the Failed message class defined in NAMUR NE107. Triggered during flow sensing errors or main unit failures. The main screen LED displays **Error**, and the LCD backlight flashes **red**. **Alarm A Error Code Definition:** Bits are defined from **MSB (Bit 7)** to **LSB (Bit 0)**, with each bit representing the following:

| Alarm bit | Alarm Definition | Alarm Code | Trigger Condition | | --------- | -------------------------------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 7 | na | na | na | | 6 | na | na | na | | 5 | na | na | na | | 4 | Flowmeter Not on Pipeline | D04 | Flowmeter is not on the pipeline or is not correctly installed on the pipeline | | 3 | IC Failure = 1 | D15 | Iout (0/4–20 mA) IC Failure = 1. Parameter D14 must be in the "on" or "do not disturb" state | | 2 | IC Overheating = 1 | D15 | Iout (0/4–20 mA) IC Overheating = 1. Parameter D14 must be in the "on" or "do not disturb" state | | 1 | Abnormal Pipe Diameter Sensing Element | D02 | Abnormality in the module used to detect pipe diameter | | 0 | Ultrasonic Sensor Communication Error | D01 | Triggered when the system detects abnormal ultrasonic component communication. Typical causes include opening the device, rotating the display cover excessively and straining internal wiring, or external forces affecting ultrasonic communication | ## Alarm B – Out of Specification The system error level follows the Out of Specification message class defined in NAMUR NE107. Used for flow beyond the set range or other conditions requiring attention. Configurable under the **D** parameter category. The main screen LED display is unchanged; the LCD backlight turns **solid red** when active. **Alarm B Error Code Definition:** Bits are defined from **MSB (Bit 7)** to **LSB (Bit 0)**, with each bit representing the following:

| Alarm-bit | Alarm Definition | Alarm Code | Trigger Condition | | --------- | --------------------------------------- | ---------- | ------------------------------------------------------------------------------------------------------------------------------------- | | 7 | Dosing Target Reached | D16 | The dosing target set at C04 is reached | | 6 | Totalized Flow Exceeds Target | D09 | The totalized counter reaches the preset target value at D11, and the accumulation condition at D10 is met | | 5 | Value Exceeds Analog Output Upper Limit | D12 | Flow value exceeds the 20 mA upper limit set at E08. For example, if E08 is set to 100 L, the actual flow is 150 L | | 4 | Value Below Analog Output Lower Limit | D12 | Flow value falls below the 4 mA lower limit set at E07. For example, if E07 is set to 0 L, the actual flow is −10 L | | 3 | Flow Velocity > 6 m/s or < −6 m/s | D13 | Triggered when absolute flow velocity exceeds 6 m/s; cleared when absolute flow velocity returns to 6 m/s or below | | 2 | OCT Timing Too Slow | D14 | In pulse output mode, OCT timing is set too slow, preventing correct pulse output | | 1 | Instantaneous Flow Above Upper Limit | D05 | Triggered when instantaneous flow exceeds the upper limit set at D06; cleared when flow drops below D06 minus the hysteresis value | | 0 | Instantaneous Flow Below Lower Limit | D05 | Triggered when instantaneous flow falls below the lower limit set at D07; cleared when flow rises above D07 plus the hysteresis value | ## Alarm C - Maintenance Required The system error level follows the Maintenance Required message class defined in NAMUR NE107. Used to indicate that the flowmeter requires maintenance. The main screen LED display is unchanged; the LCD backlight turns **solid red** when active. **Alarm C Error Code Definition:** Bits are defined from **MSB (Bit 7)** to **LSB (Bit 0)**, with each bit representing the following:

| Alarm-bit | Alarm Definition | Alarm Code | Trigger Condition | | --------- | ------------------------------------------------ | ---------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | | 7 | na | na | na | | 6 | na | na | na | | 5 | na | na | na | | 4 | na | na | na | | 3 | Poor Ultrasonic Signal | D03 | Signal is 0 bars | | 2 | Poor Signal Due to Installation Issue | D04 | Poor signal caused by installation issues. Evenly tighten the flowmeter to achieve optimal signal quality | | 1 | Excessive Line Impedance or No Wiring Connection | D15 | Iout (0/4–20 mA) excessive line impedance or no wiring connection = 1; normal = 0. Parameter D14 must be in the "on" or "do not disturb" state | | 0 | Battery Low | D09 | | ## Alarm D - Function Check The system error level follows the Function Check message class defined in NAMUR NE107. When the main unit is being operated manually and is not on a monitoring screen, this bit becomes 1. On the settings screen, the LCD backlight turns **solid orange**. **Alarm D Error Code Definition:** Bits are defined from **MSB (Bit 7)** to **LSB (Bit 0)**, with each bit representing the following: | Alarm-bit | Alarm Definition | Alarm Code | Trigger Condition | | --------- | ---------------------------------- | ---------- | ------------------------------------------------ | | 7 | na | na | na | | 6 | na | na | na | | 5 | na | na | na | | 4 | na | na | na | | 3 | na | na | na | | 2 | na | na | na | | 1 | na | na | na | | 0 | Main Unit Not on Monitoring Screen | na | Becomes 1 in simulation mode or on Setup screens | ## System Status Status codes are defined from **MSB (Bit 7)** to **LSB (Bit 0)**, with each bit representing the following:

| Alarm-bit | Alarm Definition | Alarm Code | Trigger Condition | | --------- | ---------------- | ---------- | -------------------------------------------------------------------------------------------------------------------------------- | | 7 | na | na | na | | 6 | na | na | na | | 5 | na | na | na | | 4 | na | na | na | | 3 | na | na | na | | 2 | na | na | na | | 1 | na | na | na | | 0 | OCT Status | na | NC – Normally Closed (conducting; Close = 1); NO – Normally Open (not conducting; Open = 0). Pulse output status is not included | # Communication # OCT output ## Specifications ### **NPN, PNP Output** | Power Supply | 5-30V 200mA | | --------------------------- | --------------------------------------------------------------------------------- | | Reverse Polarity Protection | Yes | | Wiring | NPN, PNP | | Current Consumption | 200 mA @ 12V during stable operation at startup (excluding communication current) | ## Wiring ### OCT NPN Output Wiring Diagram * **Brown:** 24 VDC (+), **Blue:** 0 VDC (–), **Orange:** OCT Output (+), **Yellow:** OCT Output (−) The OCT output circuit operates with a loop power of **5–30 VDC, 200 mA**. This function requires the brown and blue lines of the main DC power supply to be powered. For clarity, the DC power lines are omitted from this diagram. Refer to the [DC Power Wiring Diagram](/qr/fu-es-echosense-instruction-manual/installation-and-setup/electronic-installation#dc-power-wiring-diagram) for details.

### OCT PNP Output Wiring Diagram **Brown:** 24 VDC (+), **Blue:** 0 VDC (−), **Orange:** OCT Output (+), **Yellow:** OCT Output (−) The OCT output circuit operates with a loop power of **5–30 VDC, 200 mA**. This function requires the brown and blue lines of the main DC power supply to be powered. For clarity, the DC power lines are omitted from this diagram. Refer to the [DC Power Wiring Diagram](/qr/fu-es-echosense-instruction-manual/installation-and-setup/electronic-installation#dc-power-wiring-diagram) for details.

## OCT Parameter Configuration Follow the steps below to configure OCT output parameters: {% stepper %} {% step %} ### Set Basic Parameters * Refer to the [Parameter Settings](/qr/fu-es-echosense-instruction-manual/installation-and-setup/parameter-setup) page and complete the following steps: \ **Language Setting**, **Pipe Settings** — **A02:** Pipe Standard, **A04:** Pipe Outer Diameter, **A06:** Pipe Wall Thickness, **A08:** Pipe Material * Execute **Z03 (Automatic Initialization)**. {% endstep %} {% step %} ### **Wiring Setup** Connect the OCT output wiring according to the instructions on this page. {% endstep %} {% step %} ### E01 NC/NO (Normally Closed or Normally Open) Set parameter **E01 NC/NO** to select the default state when there is no signal: * **NC (Normally Closed):** Conducting when idle * **NO (Normally Open):** Open when idle {% endstep %} {% step %} ### E02 OCT Definition (Output Signal Type) Set parameter **E02 OCT Info** to specify the output signal type. * **If "Pulse Output" is selected:** 1. Use **E03 Pulse Width** to set the duration of each pulse. 2. Use **F03** to simulate the pulse output and verify that the receiving end correctly receives the pulse count. * **If "Pulse V2" is selected:** 1. Use **E03 Pulse Width** to set the duration of each pulse. 2. Use **E14 Pulse V2 Unit** to define the volume represented by each pulse. 3. Use **F03** to simulate the pulse output and verify that the receiving end correctly receives the pulse count. * **If "Total Alarm" is selected:** 1. Use **D09 Total Alarm** to enable the alarm. 2. Use **D10 Total Trig.** to set the trigger condition: * **"Greater than Target"** for forward flow * **"Less than Target"** for reverse flow 3. Use **D11 Total Target** to specify the cumulative target: * Positive value for forward flow * Negative value for reverse flow [*(See Note 1)*](#note-1) * **If "Flow Alarm" is selected:** 1. Use **D05 FlowLIM Alarm** to enable the flow range alarm. 2. Use **D06 UP LIM** (Upper Limit) and **D07 Low LIM** (Lower Limit) to define the normal flow range. > **Note:** If either **D06** or **D07** is adjusted, the other must also be set; otherwise the display may not function correctly. If both are unset, default values are **D06 = 100**, **D07 = 0**. 3. Use **D08 Hysteresis** to define the hysteresis operation method. Values must be positive and expressed as a percentage; larger values reduce repeated alarm triggers. [*(See Note 2)*](#note-2) {% endstep %} {% step %} ### Return to the Main Screen. Complete. {% endstep %} {% endstepper %} #### Note 1 ``` D09, D10, D11 Total Alarm Examples Example 1: Forward Flow Enable D09 Total Alarm. Set D10 Total Trig. to "Greater than Target". Set D11 Total Target to a positive value, e.g., +100. When the cumulative forward flow exceeds 100, the system triggers the total alarm. Example 2: Reverse Flow Enable D09 Total Alarm. Set D10 Total Trig. to "Less than Target". Set D11 Total Target to a negative value, e.g., −500. When the cumulative reverse flow drops below −500, the system triggers the total alarm ``` #### Note 2 ``` Flow Range Limit Alarm Example D06 Upper Limit: 30 LPM D07 Lower Limit: 10 LPM D08 Hysteresis: 3% (default) Calculations: Range: 30 − 10 = 20 LPM Hysteresis: 20 × 3% = 0.6 LPM Alarm Behavior: When flow exceeds the upper limit (30 LPM), the alarm is triggered. The alarm will clear only when the flow drops below 29.4 LPM (30 − 0.6). When flow falls below the lower limit (10 LPM), the alarm is triggered. The alarm will clear only when the flow rises above 10.6 LPM (10 + 0.6). ``` # Analog Output 0-20mA, 4-20mA ## Specifications * #### Analog output (4-20mA, 0-20mA)

Analog output (4-20mA, 0-20mA)
Wiring	3 wiring
Power supply	Device shares power with the main unit, no external power supply required.
Output Range	0–20 mA or 4–20 mA (selectable)
Maximum output range (incl. error signal range)	0~21.6 mA (0–20 mA mode) / 2.4~21.6 mA (4–20 mA mode)
Resolution	16-bit (0–24 mA physical range)
Response time	≤0.5 to 1 s
Loop Resistance	1100 ohm @ 36V 600 ohm @ 24V 250 ohm @ 12V

| Wiring | 3-wire | | -------------------- | --------------------------------------------- | | Power Supply | DC 12V to 36V | | Maximum Output Range | Self-powered, 16-bit, 4–20 mA | | Response Time | <0.5 to 1 s (matches the display update rate) | | Loop Resistance | 600 Ω @ 24V | ## Wiring ### 4–20 mA Analog Output Wiring Diagram **Brown:** 12–36 VDC (+), **Blue:** VDC (−), **Purple:** 4–20 mA (+), **Red:** 4–20 mA (−) This function requires the brown and blue lines of the main DC power supply to be powered.

## Analog Output 4-20mA Parameter Configuration Follow the steps below to configure analog output parameters: {% stepper %} {% step %} #### **Set Basic Parameters** * Refer to the [Parameter Settings](/qr/fu-es-echosense-instruction-manual/installation-and-setup/parameter-setup) page and complete the following steps: \ **Language Setting, Pipe Settings:A02:** Pipe Standard, **A04:** Pipe Outer Diameter, **A06:** Pipe Wall Thickness, **A08:** Pipe Material * Execute **Z03 (Automatic Initialization)**. {% endstep %} {% step %} #### **Wiring Setup** Connect the 4–20 mA analog output wiring according to the instructions on this page. {% endstep %} {% step %} #### **E06 Analog Output Content (Select Output Data Type)** Set parameter **E06 Iout Def.** to enable the analog current output and select the data to be output. Available options: **“Cumulative Total”**, **“Flow Rate”**, or **“Flow”**. {% endstep %} {% step %} #### **E13 – Analog Output Range (Set Current Range)** Use parameter **E13 Iout Range** to set the current output range to **4–20 mA**. {% endstep %} {% step %} #### E07 – 4 mA Value / E08 – 20 mA Value (Set Output Minimum and Maximum) Set parameters **E07 4mA Value** and **E08 20mA Value** to define the output minimum and maximum. Negative values are allowed. **Note:** E07 must be less than E08. * **Example:** To map 4–20 mA to a range of **−10 to +20**: * Set **E07 (4 mA Value)** to **−10** * Set **E08 (20 mA Value)** to **+20** Intermediate values are calculated linearly: 12 mA ≈ **+5,** 16 mA ≈ **+15** {% endstep %} {% step %} #### E09 **Analog Error Value (Set Output for Out-of-Range Flow)** Use parameter **E09 Iout Error** to specify the current output when the flow value exceeds the range defined by **E07** and **E08**. * Example: **E09 mode:** 2.4 mA & 21.6 mA, **E07:** −10, **E08:** +20 * Flow < E07 (−10) → output **2.4 mA** * Flow > E08 (+20) → output **21.6 mA** {% endstep %} {% step %} #### E11 4 mA Fine Adjustment (µA) (Adjust 4 mA Output) Enter **E11 4mA Fine Adj. µA** to test and adjust the 4 mA output. Each increment or decrement of 1 changes the output current by 1 µA. * If an external ammeter measures 3.95 mA, which is 0.05 mA (50 µA) below the target of 4.00 mA, * Set E11 to +50. The output will then be corrected to 4.00 mA. {% endstep %} {% step %} #### E12 20 mA Fine Adjustment (µA) (Adjust 20 mA Output) Enter **E12 20mA Fine Adj. µA** to test and adjust the 20 mA output. Each increment or decrement of 1 changes the output current by **1 µA**. * If an external ammeter measures **19.95 mA**, which is **0.05 mA (50 µA)** below the target of **20.00 mA**, set **E12** to **+50**. The output will then be corrected to **20.00 mA**. * If the 20 mA output cannot reach the target after adjusting **E12**, this may be due to excessive loop impedance or insufficient voltage. Check the **4–20 mA specifications** on the Motor Installation page and adjust the loop impedance or increase the voltage as necessary. {% endstep %} {% endstepper %} {% hint style="info" %} After completing the **4–20 mA** settings, verify the configuration using [**Simulation Mode**](/qr/fu-es-echosense-instruction-manual/user-interface/mo-ni-mo-shi) to ensure correctness. {% endhint %} # RS485 and Modbus RTU {% hint style="info" %} RS485 is enabled **only in the Main Screen** state. When the device is in a **settings** or **parameter editing** screen, RS485 will not respond to any Modbus commands. {% endhint %} ### **Specifications** | Baud Rate | 9600, 19200, 38400, 57600 | | --------------------------------- | ---------------------------------------------------------------------------------- | | Wiring | 2-wire | | Maximum Nodes on the Same Network | 256 (under standard unit load conditions, where each device counts as 1 unit load) | ### RS485 2-Wire Wiring Diagram * **Black:** RS485 (B−), **Green:** RS485 (A+) This function operates only when the brown and blue lines of the DC power supply are powered.\ For clarity, the DC power lines are omitted in this diagram. Refer to the **DC Power Wiring Diagram** for details. {% hint style="danger" %} Do not confuse RS485 wiring with the power lines; miswiring may damage the device, and repair costs are the user’s responsibility. {% endhint %} ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FRdnkkQDctvlkm0pdaVuL%2FRS485-en.jpeg?alt=media\&token=ad9072b2-3dbc-4fc7-99b0-ca48af52801b) {% hint style="info" %} ## **Wiring Recommendations** 1. Use **24 AWG shielded twisted pair** for RS485, daisy-chaining each device. Avoid ring or star topologies. 2. For long runs, place **termination resistors (typically 120 Ω)** at the master and far-end device; adjust based on cable specs. 3. If communication is unstable, add **bias resistors** near the master to improve signal stability. 4. For 6-core cables, trim to the minimum required length and connect the shield to ground. 5. In areas with heavy interference, implement **multiple query retries** in software to distinguish signal noise from device offline errors. {% endhint %} ### RS485 Modbus RTU Parameter Configuration Follow the steps below to configure RS485 Modbus RTU parameters: {% stepper %} {% step %} #### **Set Basic Parameters** * Refer to the [**Parameter Settings**](/qr/fu-es-echosense-instruction-manual/installation-and-setup/parameter-setup) page and complete the following steps: **Language Setting, Pipe Settings:A02:** Pipe Standard, **A04:** Pipe Outer Diameter, **A06:** Pipe Wall Thickness, **A08:** Pipe Material * Execute **Z03 (Automatic Initialization)**. {% endstep %} {% step %} #### **Wiring Setup** Connect the RS485 Modbus RTU wiring according to the instructions on this page. {% endstep %} {% step %} #### **E04 Modbus ID (Communication Protocol Application)** Set **E04** to assign the flowmeter’s **Modbus Slave ID** on the RS485/Modbus network. * Ensure that each device on the same bus has a **unique ID** to avoid communication conflicts. * This parameter **cannot be modified via RS485**. {% endstep %} {% step %} #### **E05 Baud Rate** Set **E05 Baud** to specify the flowmeter’s **Modbus communication speed** (Baud Rate). * The **Master** and **Slave** devices must be set to the **same Baud Rate** for proper communication. * This parameter **cannot be modified via RS485**. {% endstep %} {% step %} #### **Return to Main Screen** Return to the **Main Screen** (green LED). RS485 communication is enabled **only on the Main Screen**. {% endstep %} {% step %} #### Test Read/Write Memory Refer to the [**Modbus RTU Protocol**](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol) to test the memory for reading and writing. This parameter provides 4 types of byte packet formats. | | | | ---------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | |

Communication Format

bit order: lsb first
byte order: big endian
Data bits: 8
Parity: None
Stop bits: 1

Floating point number follows IEEE754-1985. The float32 below stands for 32bits Single precision floating point number.

| | **Memory Definition and Function** |

Modbus-accessible memory is divided into two types: Read-Only (RO) and Read/Write (RW).

Read-Only Memory (RO):
- Primarily stores flowmeter status information, such as real-time flow.
- This type is the most commonly used memory.
- Can only be read using function code 04.
Read/Write Memory (RW):
- Primarily stores flowmeter configuration parameters.
- Each write operation can only modify one parameter at a time.
  - If the parameter occupies 1 register, use function code 06.
  - If the parameter occupies 2 registers, use function code 30.

| {% hint style="info" %} In Modbus RTU communication, a Register is the basic unit for memory communication, with a length of 2 bytes (16 bits).\ A Byte is the basic unit for data transmission, with a length of 8 bits. {% endhint %} {% endstep %} {% endstepper %}

Modbus RTU Example – Reading Float32 Data (Click to expand)

### Modbus RTU Example – Reading Float32 Data Using a Read-Only memory read command (04) as an example, this section explains how to send a command and parse the returned data into a decimal value when the accumulated flow is **5,000.0** liters. **Read-Only Memory – Read Command (04) Format**

Modbus RTU Example – Read-Only Memory Read Command (04) (Click to expand)

### **Modbus RTU Example – Read-Only Memory Read Command (04)** **Master Sends Read Command (TX Frame)** According to device specifications, the accumulated flow is stored in **Float32 format**, occupying **2 registers (4 bytes)**; therefore, the quantity to read should be set to **00 02**. The master must send Modbus function code 04 (Read Input Registers) to read 2 registers starting from address 0000. ``` TX: 01 04 00 00 00 02 71 CB ``` * Slave Address = 01 * Function Code = 04 * Starting Register Address = 00 00 * Quantity to Read = 00 02 (2 registers) * CRC Checksum = 71 CB **Slave Response Data (RX Frame)** After receiving the read request, the slave returns the internally stored **5,000.0 liters (Float32)** data, packaged as **4 bytes** according to **Modbus Register Big Endian** (high byte first) and **IEEE 754 Float32** format. ``` RX: 01 04 04 45 9C 40 00 1F 66 ``` * Slave Address = 01 * Function Code = 04 * Byte Count (Number of Data Bytes) = 04 (4 Bytes) * Data (Data Field) = 45 9C 40 00 * CRC Checksum = 1F 66 **Data Parsing and Conversion (Back to Decimal)** **Step A: Arrange the Data**\ Since the device uses **Big Endian** format, the most significant byte comes first. Therefore, the 4 bytes are kept in the received order and combined as:\ `459C4000₁₆` **Step B: Decode the Float32 Structure (SEM: S = Sign, E = Exponent, M = Mantissa)**\ Convert `459C4000₁₆` into a 32-bit binary number for IEEE 754 Float32 interpretation. ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F0e1rmsXiCgx3TxOHBdYW%2Fimage?alt=media\&token=6e0a52b2-1fd7-41f7-8c3a-100dc74d710e) **Partial Binary Value Explanation** * **S (Sign bit)** = 0 (1 bit) → 0 means a positive number * **E (Exponent bits)** = `10001011` (8 bits) → 139₁₀\ Actual exponent = 139 − 127 = **12** * **M (Mantissa bits)** = `001110001...` (23 bits) → the significand is **1.M** **Step C: Calculate the Value** According to the IEEE 754 Float32 format, the calculation is as follows.\ The exponent bits `10001011₂` equal 139₁₀, so the actual exponent is 139 − 127 = 12. * The mantissa bits are 00111000100000000000000, giving a significand of 1.001110001... After shifting the binary point 12 places to the right and converting to decimal: Value = 2¹²+2⁹+2⁸+2⁷+2³ \ \= 4096+512+256+128+8 \ \= 5000.0 Therefore, the Modbus RX response data `01 04 04 45 9C 40 00 1F 66` represents a cumulative flow value of **5000.0 liters**.

### **Modbus Data Format Converter** Below is a sample **HTML/CSS/JS (CodePen example)** of a simple converter used to convert an **8-digit hexadecimal value** into a **Float32** number. {% embed url="" %} # Modbus RTU Protocol ### Communication Format | Name | Value | Description | | ----------------------- | --------------: | ------------------------------------------------------------------------ | | Bit Order | lsb first | Data is transmitted starting from the Least Significant Bit (LSB). | | Byte Order | big endian | Data is transmitted starting from the Most Significant Byte (MSB). | | Data bits | 8 | Each character or byte consists of 8 data bits. | | Parity | None | No parity bit is used for error checking during transmission. | | Stop bits | 1 | 1 stop bit is used at the end of each character. | | Floating-Point Standard | IEEE 754-1985 | Floating-point numbers (Float32) use the 32-bit single-precision format. | | Register | 2 Byte / 16 bit | Floating-point numbers (Float32) use the 32-bit single-precision format. | | Byte | 8 bit | The basic unit length of data transmission. | {% hint style="info" %} In **Modbus RTU communication**, a **Register** is the basic unit of memory communication, with a length of **2 bytes (16 bits)**. A **Byte** is the basic unit of data transmission, with a length of **8 bits**. {% endhint %} *** ### **Memory Definition and Functions** Modbus memory is divided into two categories, **read-only** and **read-write**. * **Read-only** type is mainly for flow meter status related memory, such as instantaneous flow rate. This is also the most commonly used memory. Refer to [Read-only memory](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-only-memory-rom/read-only-memory-read-instruction-04-and-memory-lists) * Read-write memory is mainly to set-up parameters such as pipe diameter, and to reset variables, such as set zero on the cumulative flow. Refer to [Read-Write Memory (RAM)](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram) {% hint style="info" %} Read-write memory is only readable by using instruction 03. You can only change one parameter at a time with the write operation. If the length of the target register is 1, please use instruction 06. If the length is 2 registers, please use instruction 30. Refer to R {% endhint %} | **Memory Types** | **Read-Only Memory** | **Read/Write Memory** | | ---------------- | ---------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ | | Main Functions | Read the device's real-time status and results. | Set the device's operating parameters and calibration values. | | Stored Content | Stores memory related to **flow status**, such as instantaneous flow and totalized flow. | Stores memory related to **flow configuration parameters**, such as pipe diameter, calibration coefficients, and flow cutoff values. | | Access Rights | **Read-only**: can only be read, not written | **Read/Write**: can be both read and written. | | Function Codes |

Read Command: 04
(Read Input Registers)

Read Command: 03
Write Command: 06 / 30 / 31

| # Read-Only Memory (ROM) Read-Only Memory is used to store the device's real-time status, measurement results, and flow-related memory. The data is read-only and can only be accessed via the Read command. Values cannot be modified using write commands. # Read-Only Memory (ROM) – List ## Read-Only Memory (ROM) – List ### Memory Location and Definition | **Field Names** | **Functions** | | --------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ | | Register Address (Hex) | The two bytes that actually appear in the communication frame. Use this for building frames directly, or for 0-based masters (e.g. CODESYS, pymodbus). | | Decimal | The decimal value of the protocol address. For 1-based debug software (e.g. Modbus Poll, Modscan), add 1 to this value. | | Master Address (Convention) | The value to enter directly into PLC/HMI configuration screens — Siemens S7-200 SMART / S7-1200, Delta, Weintek, etc. | | Register Length | The length of the variable, in units of Registers (2 bytes each). | | Memory Content | Description of the function or purpose of the memory. | | Data Type | Specifies the format of the transmitted or received data. | ## Read-Only Memory List | Register Address | Decimal | Master Address | Register Length | Memory Content | Data Type | Remarks | | ---------------- | ------- | -------------- | --------------- | --------------------------------------------------------------------------------------------------------------------------- | --------------- | -------------------------------------------------------------------------- | | 0x0000 | 0 | 30001 | 2 | Instantaneous Flow | float 32 | | | 0x0002 | 2 | 30003 | 2 | Instantaneous Flow Rate | float 32 | | | 0x0004 | 4 | 30005 | 2 | Totalized Flow | float 32 | | | 0x0006 | 6 | 30007 | 2 | Instantaneous Flow | int 32 | Value is instantaneous flow ×100 | | 0x0008 | 8 | 30009 | 2 | Instantaneous Flow Rate | int 32 | Value is instantaneous flow rate ×100 | | 0x000A | 10 | 30011 | 2 | Totalized Flow | int 32 | Value is totalized flow ×100 | | 0x000C | 12 | 30013 | 2 | Iout Current Value (μA) | unsigned int 32 | | | 0x000E | 14 | 30015 | 1 | [error code a](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status#alarm-critical-failure) | unsigned int 16 | First byte is 0, due to no definition. | | 0x000F | 15 | 30016 | 1 | [error code b](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status#alarm-b-out-of-specification) | unsigned int 16 | First byte is 0, due to no definition. | | 0x0010 | 16 | 30017 | 1 | [error code c](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status#alarm-c-maintenance-required) | unsigned int 16 | First byte is 0, due to no definition. | | 0x0011 | 17 | 30018 | 1 | [error code d](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status#alarm-d-function-check) | unsigned int 16 | First byte is 0, due to no definition. | | 0x0012 | 18 | 30019 | 1 | [System Status](/qr/fu-es-echosense-instruction-manual/user-interface/alarms-and-system-status#system-status) | unsigned int 16 | First byte is 0, due to no definition. | | 0x0013 | 19 | 30020 | 4 | Totalized Flow | int 64 | Value is totalized flow ×100,000, rounded to integer (introduced in P1203) | | 0x0017 | 23 | 30024 | 2 | Dosing | float32 | (introduced in P1203) | | 0x0019 | 25 | 30026 | 2 | Dosing | int32 | Value is totalized flow ×100, rounded to integer (introduced in P1203) | | 0x001B | 27 | 30028 | 4 | Dosing | int64 | Value is totalized flow ×100,000, rounded to integer (introduced in P1203) | # Read-Only Memory – Read Command (04) {% hint style="info" %} **ⓘ** When reading large values using different data formats (e.g., **Float32** or **Int64**) and performing conversions, **very small differences** may occur due to internal calculation methods. These differences are typically **less than 1/10,000** and are considered **normal**. A single read command can access up to **40 registers**. Requests exceeding this length will be ignored. {% endhint %} ### Function Code 04 **Purpose:** This memory area is specifically used to store the device's **real-time status**, **measurement results**, and **flow-related memory**. **Characteristics:** The data is **read-only** and can only be accessed via the **Read command**. Values **cannot be modified** using write commands. ### Read-Only Memory – Read Command (04) Format

### Modbus RTU – Example of Read-Only Memory Read Command (04) Using the **Read-Only Memory Read Command (04)** as an example, this section explains how to send a command and parse the returned data into a decimal value when the **totalized flow** is **20,000.5 liters**. **Master Sends Read Command (TX Frame)** According to device specifications, the accumulated flow is stored in **Float32 format**, occupying **2 registers (4 bytes)**; therefore, the quantity to read should be set to **00 02**. The master must send Modbus function code 04 (Read Input Registers) to read 2 registers starting from address 0000. ``` TX: 01 04 00 00 00 02 71 CB ``` * Slave Address = 01 * Function Code = 04 * Starting Register Address = 00 00 * Quantity to Read = 00 02 (2 registers) * CRC Checksum = 71 CB **Slave Response Data (RX Frame)** After receiving the read request, the slave returns the internally stored **20,000.5 liters (Float32)** data, packaged as **4 bytes** according to **Modbus Register Big Endian** (high byte first) and **IEEE 754 Float32** format. ``` RX: 01 04 04 45 9C 40 00 E2 56 ``` * Slave Address = 01 * Function Code = 04 * Byte Count (Number of Data Bytes) = 04 (4 Bytes) * Data (Data Field) = 45 9C 40 00 * CRC Checksum = E2 56 **Data Parsing and Conversion (Back to Decimal)** **Step A: Arrange the Data**\ Since the device uses **Big Endian** format, the most significant byte comes first. Therefore, the 4 bytes are kept in the received order and combined as:\ `459C4000₁₆` **Step B: Decode the Float32 Structure (SEM: S = Sign, E = Exponent, M = Mantissa)**\ Convert `459C4000₁₆` into a 32-bit binary number for IEEE 754 Float32 interpretation. ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F0e1rmsXiCgx3TxOHBdYW%2Fimage?alt=media\&token=6e0a52b2-1fd7-41f7-8c3a-100dc74d710e) **Partial Binary Value Explanation** * **S (Sign bit)** = 0 (1 bit) → 0 means a positive number * **E (Exponent bits)** = `10001011` (8 bits) → 139₁₀\ Actual exponent = 139 − 127 = **12** * **M (Mantissa bits)** = `001110001...` (23 bits) → the significand is **1.M** **Step C: Calculate the Value** According to the IEEE 754 Float32 format, the calculation is as follows.\ The exponent bits `10001011₂` equal 139₁₀, so the actual exponent is 139 − 127 = 12. * The mantissa bits are 0011100100000000000000，, giving a significand of 1.001110001... After shifting the binary point 12 places to the right and converting to decimal: Value = 2¹⁴ + 2¹¹ + 2¹⁰ + 2⁹ + 2⁵ + 2⁻¹\ \= 16384 + 2048 + 1024 + 512 + 32 + 0.5\ \= 20000.5 Therefore, the Modbus RX response data `01 04 04 45 9C 40 00 E2 56` represents a cumulative flow value of **20000.5 liters**. {% embed url="?" %} A Modbus format converter tool is available at: # Read-Write Memory (RAM) | **Function Code** | **Name** | **Data Length** | **Core Purpose** | | ----------------- | ------------------------------------------------------- | --------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 03 | Read/Write Memory (RAM) – Read Command | 1\~125 Registers | Read Command – Single or Multiple Holding Registers. Used to read any desired configuration parameters. | | 06 | Read/Write Memory (RAM) – Single Register Write Command |

1 Registers

(16 bit)

| Write Command – Single Int16 Parameter. Used to write a simple single Int16 value, suitable for setting options, codes, or small-range integers. Example: Set A08 Pipe Material to PVC (code 2). | | 30 | Read/Write Memory (RAM) – Dual Register Write Command |

2 Registers

(32 bit)

| Write Command – Float32 / Int32 (32-bit values). Used to write 32-bit values, such as floating-point numbers, supporting positive, negative, and fractional values approximately in the range 10⁻³⁸ to 10³⁸. Example: Set A18 Low Flow Cutoff to +5.5, or A23 Zero Offset to −0.08. | | 31 | Read/Write Memory (RAM) – Four Register Write Command |

4 Registers

(64 bit)

| Write Command – Int64 (64-bit values). Used to write 64-bit values, suitable for integer parameters exceeding the 32-bit range (\~4.3 billion). Example: Set D11 Total Target (64-bit) or C04 Dosing Target (64-bit) to values exceeding the 32-bit limit. | # Read/Write Memory – Read List {% hint style="info" %} When reading large values with different data formats (e.g., **Float32** or **Int64**), tiny differences may occur due to internal calculations, typically **less than 1/10,000**, which is normal. **Read commands** must not exceed **20 registers**; longer requests will be **ignored**. See the register list for details. {% endhint %} ### How to Use the Read/Write Memory List | Field Name | Function | | ------------------- | ---------------------------------------------------------------------------------------------------------------------------- | | Register Address | Addresses for read/write memory, not shared with read-only memory. | | Register Length | Length of the register variable. | | Memory Content Name | Describes the name or purpose of the memory content. | | Data Type | Specifies the format of transmitted or received data. | | Read Command | Indicates the available read commands. | | Write Command | Indicates the available write commands. A value of X in this column means remote writing is not supported for that register. | ## Read-Write Memory List

Register Address	Decimal	Master Address	Reg Length	Memory Content Name	Data Type	Read Command	Write Command
A parameter Category
0x0000	0	40001	1	A02 Preset Pipe Spec	int16	03	Ｘ
0x0001	1	40002	1	A03 Pipe Geo Unit	int16	03	06
0x0002	2	40003	2	A04 Pipe Outer Diameter	float32	03	Ｘ
0x0004	4	40005	2	A05 Pipe Perimeter	float32	03	Ｘ
0x0006	6	40007	2	A06 Pipe Thickness	float32	03	Ｘ
0x0008	8	40009	2	A07 Pipe Inner Diameter	float32	03	Ｘ
0x000A	10	40011	1	A08 Pipe Material	int16	03	Ｘ
0x000B	11	40012	2	A09 Pipe Soundspeed	float32	03	Ｘ
0x000D	13	40014	1	A10 Liquid Type	int16	03	Ｘ
0x000E	14	40015	2	A12 Liquid Soundspeed	float32	03	Ｘ
0x0010	16	40017	2	A13 K Viscosity cst	float32	03	Ｘ
0x0012	18	40019	1	A15 Damping	int16	03	06
0x0013	19	40020	1	A16 Direction	int16	03	06
0x0014	20	40021	1	A17 Neg Flow	int16	03	06
0x0015	21	40022	2	A18 Low Flow Cutoff	float32	03	30
0x0017	23	40024	1	A19 Fast Update	int16	03	06
0x0018	24	40025	1	A20 Anti Noise	int16	03	06
0x0019	25	40026	2	A23 Zero Offset	float32	03	30
0x001B	27	40028	1	A24 Start up check	int16	03	06
0x001C	28	40029	1	A25 Off-pipe zero	int16	03	06
0x001D	29	40030	1	A26 Beta Mode	int16	03	06
B parameter Category
0x0100	256	40257	1	B01 Vol Unit	int16	03	06
0x0101	257	40258	1	B02 Time Unit	int16	03	06
0x0102	258	40259	1	B03 Total Unit	int16	03	06
0x0103	259	40260	1	B04 VelocityUnit	int16	03	06
0x0104	260	40261	1	B05 Dec Place	int16	03	06
0x0105	261	40262	1	B06 Pipe Geo Unit	int16	03	06
K parameter Category
0x0A00	2560	42561	1	K02 Calibra Mode	int16	03	06
0x0A01	2561	42562	2	K03 Scale Factor	float32	03	30
0x0A03	2563	42564	2	K04 Manual Offset	float32	03	30
0x0A05	2565	42566	2	K05 Totalizer Scale	float32	03	30
C parameter Category
0x0200	512	40513	1	C01 Total Method	int16	03	06
0x0201	513	40514	1	C02 Del Total	int16	03	06
0x0202	514	40515	1	C03 Dosing Mode	int16	03	06
0x0203	515	40516	2	C04 Dosing Target	float32	03	30
0x0205	517	40518	1	C05 Dosing Reset Time	int16	03	06
0x0283	643	40644	4	C04 Dosing Target(64)	int64	03	31
D parameter Category
0x0300	768	40769	1	D01 BoardComm Ala	int16	03	06
0x0301	769	40770	1	D02 Pipe Sensor Alarm	int16	03	06
0x0302	770	40771	1	D03 Bad UltraS Signal	int16	03	06
0x0303	771	40772	1	D04 Off Pipe Alarm	int16	03	06
0x0304	772	40773	1	D05 FlowLIM Ala	int16	03	06
0x0305	773	40774	2	D06 Up LIM	float32	03	30
0x0307	775	40776	2	D07 Low LIM	float32	03	30
0x0309	777	40778	1	D08 Hysteresis%	int16	03	06
0x030A	778	40779	1	D09 Total Ala	int16	03	06
0x030B	779	40780	1	D10 Total Trig	int16	03	06
0x030C	780	40781	2	D11 Total Target	float32	03	30
0x030E	782	40783	1	D12 Iout Alarm	int16	03	06
0x030F	783	40784	1	D13 Speed Alarm	int16	03	06
0x0310	784	40785	1	D14 PulseOverlap	int16	03	06
0x0311	785	40786	1	D15 IoutStatAla	int16	03	06
0x0312	786	40787	1	D16 Dosing Alarm	int16	03	06
0x038C	908	40909	4	D11 Total Target(64)	int64	03	31
E parameter Category
0x0400	1024	41025	1	E01 NC/NO	int16	03	06
0x0401	1025	41026	1	E02 OCT Info	int16	03	06
0x0402	1026	41027	1	E03 Pulse Width	int16	03	06
0x0403	1027	41028	1	E06 Iout Def	int16	03	06
0x0404	1028	41029	2	E07 4mA Value	float32	03	30
0x0406	1030	41031	2	E08 20mA Value	float32	03	30
0x0408	1032	41033	1	E09 Iout Error	int16	03	06
0x0409	1033	41034	2	E11 4mA Adj uA	float32	03	30
0x040B	1035	41036	2	E12 20mA Adj uA	float32	03	30
0x040D	1037	41038	1	E13 Iout Range	int16	03	06
0x040E	1038	41039	1	E14 PulseV2 Unit	int16	03	06
0x040F	1039	41040	1	E17 Endianness	int16	03	06
F parameter Category
0x0500	1280	41281	2	F01 Sim Volume	float32	03	30
0x0502	1282	41283	1	F02 Sim Mode	int16	03	06
H parameter Category
0x0700	1792	41793	1	H01 LED Bri	int16	03	06
0x0701	1793	41794	1	H02 LCD Bri	int16	03	06
0x0702	1794	41795	1	H03 Green Light	int16	03	06
0x0703	1795	41796	1	H04 Language	int16	03	06
0x0704	1796	41797	1	H06 Reset	int16	03	06
0x0705	1797	41798	1	H07 Lock Device	int16	03	06
0x0706	1798	41799	1	H08 Password	int16	03	06
0x0707	1799	41800	1	H09 Home Page	int16	03	06
0x0708	1800	41801	1	H10 Debug Page	int16	03	06

### **Example: C02 Del Total (clear/reset totalized flow)** | Step | Value | | ------------------------------------------ | ------------------------ | | Table Register Address (Hex) | 0x0201 | | Converted to decimal | 0x0201 = 2×256 + 1 = 513 | | Master address to enter (4xxxx convention) | 40001 + 513 = 40514 | | Address bytes in the frame | 02 01 | | Full write frame (station 01) | 01 06 02 01 00 01 18 72 | If `40201` is entered by mistake, the master sends decimal `200` (`0x00C8`) — an address that doesn't exist. The flow meter won't respond, or may return exception code 02; on the PLC side this appears as "no response to write." ### Self-verification tip If you're not sure which address convention your master uses, first use function code 03 to read the register that corresponds to Modbus ID. If the value read back matches the device's own station number, the address base is correct and you can safely apply the same convention to the other addresses. # Read/Write Memory - Read Command (03) {% hint style="info" %} When reading large values using different data formats (e.g., Float32 or Int64) and performing conversions, very small differences may occur due to internal calculation methods, typically less than 1/10,000, which is considered normal. Registers from different parameter categories cannot be read across categories. A single read command can access up to 40 registers. Requests exceeding this length will be ignored. {% endhint %} #### **Function Code:** 03 This command can read single or multiple holding registers, used to access configuration parameters defined in the device’s Holding Registers. #### **Read/Write Memory – Read Command (03) Format** ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2Fi8RrD76NW3UTPTgMJvLR%2Fmodbus-03-TX-diagram-en.png?alt=media\&token=4ee38fc3-1e50-4370-a334-058fd901ef32) ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FCSwfoy6XhE4g9ogeNj4M%2Fmodbus-03-RX-diagram-en.png?alt=media\&token=78c65b76-de86-4411-98e9-92875473b288) #### Modbus RTU **Example of Reading Read/Write Memory Holding Registers (03)** Using Function Code 03 to read the **A02 Preset Pipe Spec** register as an example: According to the Read/Write Memory – Read List, the starting address is **00 00**, register length is 3 (reading three registers: A02, A03, and first register of A04), data type is Int16 (16-bit integer), and byte order is **Big Endian**. **Master Sends Read Command (TX Frame)**\ **TX Request Command:** ``` TX: 01 03 00 00 00 03 05 CB ``` * Slave Address = 01 * Function Code = 03 * Starting Register Address = 00 00 (starting address of A02 Preset Pipe Spec) * Number of Registers to Read = 00 03 (read 3 registers starting from 00 00) * CRC Checksum = 05 CB (calculated using the CRC algorithm) **Slave Response Data (RX Frame)** The master sends the read command to the slave (flow meter), which responds with the corresponding data. **RX Response Data:** ``` RX: 01 03 06 00 06 00 00 42 41 59 E5 ``` * Slave Address = 01 * Function Code = 03 * Byte Count = 06 (3 registers = 6 bytes) * Data Bytes: * `00 06` — A02 Preset Pipe Spec = code 6 (astm sch 80 pvc) * `00 00` — A03 Pipe Geo Unit = 0 (mm) * `42 41` — first register of A04 Pipe Outer Diameter (Float32, high bytes) * CRC = 59 E5 (calculated using the CRC algorithm) #### **Data Parsing and Conversion (to Decimal)** #### **Step A** – Arrange the Data * Received Data: 0003 * Data Type: Int16 (16-bit integer) #### **Step B – Convert to Decimal and Map Material** * Convert the hexadecimal value 0003 to decimal:\ Decimal Calculation: (0 × 256) + 3 = 3\ Final Value: 3 * Material Mapping: Refer to the A08 Pipe Material list. The value 3 corresponds to PP material. ### **FAQ** * **Why is there a difference between the “Memory Map” and the “PLC Read Address”?** Users may see that the memory map shows **40005**, but in the PLC, **you need to enter 4 (or 0004) to read the correct value**. This is due to Modbus addressing: human-readable addresses (memory map) and actual device read addresses (communication addresses) have a fixed offset. For **Function Code 03**, **40001** is the base address. Reading starts from this base, so 40001 corresponds to offset **0000** and read address **0000**.

Therefore, when the document indicates reading **40005**, the actual starting address in the Modbus **Function Code 03** packet is **0004**, i.e.: **Actual communication address=Document address−40001**\ \ **Example with a larger address:** Document address 40514 (C02 Del Total) → 40514 − 40001 = **513 (decimal)** → convert to hex: **0x0201** → frame bytes **02 01**. See the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for pre-converted Decimal and Master Address values for every register. {% hint style="info" %} **Note:** Modbus uses 0-based addressing (communication packets start from 0), So, in general : Actual communication address=Document address−40001. **BUT, i**f the PLC or HMI is set to 1-based addressing (software adds 1), enter the starting address according to the software’s rules to read the correct register. {% endhint %} # Read/Write Memory - Single Register Write Command (06) {% hint style="info" %} When writing large values using different data formats (e.g., Float32 or Int64) and performing conversions, very small differences may occur due to internal calculation methods. These differences are typically less than 1/10,000 and are considered normal. Please refer to [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) {% endhint %} #### **Function Code:** 06 The Single Register Write Command (Function Code 06) is used to write one simple Int16 parameter (1 register, 16-bit). It is suitable for setting options, codes, or small-range integers. #### **Read/Write Memory – Single Register Write Command (06) Format** ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FO5zGTvGYS56x6bfXFDlB%2Fmodbus-06-TX-diagram-en.png?alt=media\&token=1d38d890-ed3c-4cc3-8115-a821112bc88b) ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FaiR0Iv4HVTbXgpyt0JM8%2Fmodbus-06-RX-diagram-en.png?alt=media\&token=f6870ab9-0972-4285-89d0-92115125bbee) #### Read/Write Memory – Single Register Write Command (06) This example demonstrates how the master uses **Function Code 06** to write the parameter **“A03 Pipe Geo Unit”** and set the unit to **inch**. According to the Read/Write Memory List, this parameter has: * **Starting Address:** `00 01` * **Register Length:** 1 register * **Data Type:** `int16` #### Master Sends Write Command (TX Frame) ``` TX: 01 06 00 01 00 01 19 CA ``` * Slave Address: 01 * Function Code: 06 * Starting Register Address: 00 01 (A03 Pipe Geo Unit address) * Written Value: 00 01 (unit = inch) * CRC: 19 CA (calculated by CRC algorithm) #### Slave Response Data (RX Frame) When the write command is successful, the master receives a response from the slave as confirmation. ``` RX: 01 06 00 01 00 01 19 CA ``` * Slave Address: 01 * Function Code: 06 * Register Address: 00 01 (A03 Pipe Geo Unit) * Written Value: 00 01 (inch) * CRC: 19 CA (must match the TX CRC) If the RX frame exactly matches the TX frame (including CRC), it confirms that: * The command was successfully executed. * The value **00 01** (inch) was correctly written to register **00 01**. * The slave has acknowledged completion of the operation. # Read/Write Memory Dual-Register Write Command (30) {% hint style="info" %} When large values are processed using different data formats (e.g., *float32* vs. *int32*), minor numerical differences may occur due to internal calculation methods. These differences are typically less than **1/10,000** and are normal. This command applies **only to 32-bit (2-register) memory items**. {% endhint %} #### Function Code 30 The Dual Register Write command (Function Code 30) writes data to two consecutive registers (32-bit / 4 bytes).\ It is used for parameters that include decimal or signed values.\ Float32 range: \~1.18 × 10⁻³⁸ to 3.4 × 10³⁸\ Examples: Set A18 Low Flow Cutoff to +5.5, Set A23 Zero Offset to −0.08. #### Read/Write Memory – Dual Register Write Command (30) Format ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2F9Y7r1ax2yImIPfrhHP3U%2Fmodbus-30-TX-diagram-en.png?alt=media\&token=6c003763-0187-44dc-a0e0-5aa50dc01579) ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FwEs72MDWBy7kU6ImRSdT%2Fmodbus-30-RX-diagram-en.png?alt=media\&token=15b34a35-c448-42df-953d-51a890c5bcb7) ### Modbus RTU Read/Write Memory – Dual Register Write Command (Function Code 30) This example shows the master using **Function Code 30** to write **+5.5** to the parameter **“A18 Low Flow Cutoff”**. According to the Read/Write Memory List: * **Starting Address:** 00 15 * **Master/PLC address (4xxxx convention)**: **40022** \ (see [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the full conversion table.) * **Register Length:** 2 (two registers) * **Data Type:** Float 32 #### 1. Value Conversion and Data Preparation (Hex Data) Convert the decimal value **+5.5** to **IEEE 754 Float32 (Big Endian)** format. $$ 5.5 ₁₀ = 40B00000 ₁₆ $$ The resulting 4-byte data is:：`40` `B0` `00` `00`。 #### 2. Master Sends Write Command (TX Frame) The master uses Function Code 30 with a Byte Count of 04, writing 4 data bytes to two registers starting at address 00 15. ``` TX： 01 30 00 15 00 02 04 40 B0 00 00 27 D1 ``` * Slave Address: `01` * Function Code: `30` * Starting Register Address: `00 15` (A18 Low Flow Cutoff) * Number of Registers Written: `00 02` (2 registers / Float32) * Byte Count: `04` (4 data bytes) * Written Data (Float32): `40 B0 00 00` (+5.5 in Hex) * CRC: `27 D1` (calculated CRC) #### 3. **Slave Response (RX Frame)** When the write command is successful, the master receives a response from the slave as confirmation. ``` RX: 01 30 00 15 00 02 D1 CB ``` * Slave Address: `01` * Function Code: `30` * Starting Register Address: `00 15` (A18 Low Flow Cutoff) * Registers Written: `00 02` (confirmation of 2 registers written) * CRC: `D1 CB` (calculated CRC) Once the master receives the RX frame and verifies that the **Function Code**, **register address**, and **number of registers written** are correct, it confirms that **A18 Low Flow Cutoff has been successfully set to +5.5**. # Read/Write Memory - Four Register Write Command (31) {% hint style="info" %} When large values are processed using different data formats (e.g., **float32** vs. **int64**), minor differences may occur due to internal calculation methods, typically less than **1/10,000**, and are considered normal. This command applies **only to memory items with a register length of 4**. Refer to the [parameter list](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list#read-write-memory-list) for details. {% endhint %} #### Function Code 31 The Four Register Write command (Function Code 31) writes 4 consecutive registers (64-bit), supporting Int64 or other 64-bit values. It is recommended for writing large parameters such as: D11 Total Target (64-bit), C04 Dosing Target (64-bit) {% hint style="info" %} A standard 32-bit floating-point number (Function Code 30) has a precision of about **7 significant digits**. When the value exceeds ten million, using 32-bit floats may cause **accuracy loss and rounding errors**. In such cases, it is recommended to use **Function Code 31** with **64-bit integers (Int64)** to ensure the data is accurately stored in memory without any rounding errors. {% endhint %} #### ![](https://4028902321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSBz5Tlpy8GCIkK4ygkgZ%2Fuploads%2FnrsIIONP5rXNgU4uB51I%2Fmodbus-31-TX-diagram-en.png?alt=media\&token=8d497a1b-f6f2-4bae-b108-65b45c23e4e5) Function Code 31 uses a mirror-response mechanism. When the write is successful, the RX response frame from the slave will exactly match the TX request in both format and content. #### Read/Write Memory – Four Register Write Command (Function Code 31) Format This example demonstrates how the **master** uses **Function Code 31** to write a target value of **+999,999,999** to the parameter **C04 Dosing Target**. * **Register Address:** 02 83 * **Master/PLC address (4xxxx convention)**: **40644** \ (see [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the full conversion table) * **Register Length:** 4 (4 consecutive registers, 64-bit) * **Data Type:** Int64 #### 1. Value Conversion and Data Preparation (Hex Data) * Target Value: `999,999,999` (decimal) * Hex Conversion: `3B 9A C9 FF`。 * Packed in Int64 Format (8 Bytes):\ Since Function Code 31 requires 8 bytes, prepend zeros:\ Complete 64-bit Data: `00 00 00 00 3B 9A C9 FF` #### **2.** Master Sends Write Command (TX Frame) ``` TX： 01 31 02 83 00 00 00 00 3B 9A C9 FF 0B 7A ``` * Slave Address: `01` (Flow meter address) * Function Code: `31` (Write 4 Registers) * Starting Register Address: `02 83` (C04 Dosing Target 64-bit memory address) * Data to Write: `00 00 00 00 3B 9A C9 FF` (C04 Dosing Target 64-bit value) * CRC: `0B 7A` (Calculated CRC for error checking) #### 3. Slave Response (RX Frame) When the write is successful, the slave echoes the TX frame for verification. ``` RX: 01 31 02 83 00 00 00 00 3B 9A C9 FF 0B 7A ``` # Single Bit Data Read/Write Commands (01 / 05) – Common for HMI {% hint style="info" %} **Purpose and Use Cases:** Certain Human-Machine Interfaces (HMIs) only support the **05 Write Command** to send a signal to reset the accumulated total. Additionally, some HMIs require support for the **01 Read Command** to verify that the sensor is functioning correctly. Please refer to [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) {% endhint %} ### Function Code 01 Example – Single Bit Read {% hint style="info" %} This command **does not reset** the C02.Del.Total (Totalizer Clear) option. It is used for **reading a single bit via HMI** (01/05). When the 01 command is sent correctly, the slave responds by returning the requested bit status only. {% endhint %} ### Master Sends 01 (TX) Example ``` TX: 01 01 00 0A 00 01 A4 0E ``` * **Slave Address:** 01 (Flow meter address) * **Function Code:** 01 (Read 1 bit) * **Starting Address:** 02 01 (C02.Del.Total memory address) * **Quantity:** 00 01 (Read 1 bit) * **CRC:** A4 0E (Error check) ### Slave Response 01 (RX) Example ``` RX: 01 01 01 00 51 88 ``` * **Slave Address:** 01 * **Function Code:** 01 (Read) * **Data:** 01 00 (Bit value, slave is online and responding) * **CRC:** 51 88 ## Function Code 05 Example – Single Bit Write (Trigger Totalizer Clear) {% hint style="info" %} This command **activates** the C02.Del.Total clear option, immediately resetting the totalizer to zero. {% endhint %} ### Master Sends (TX) Example ``` TX: 01 05 02 01 FF 00 DC 42 ``` * **Slave Address:** 01 * **Function Code:** 05 (Write single register) * **Starting Address:** 02 01 (C02.Del.Total memory address) * **Data:** FF 00 (Trigger clear) * **CRC:** DC 42 ### Slave Response (RX) Example ``` RX: 01 05 02 01 FF 00 DC 42 ``` * **Slave Address:** 01 * **Function Code:** 05 * **Starting Address:** 02 01 * **Data:** FF 00 (Echoes successful write) * **CRC:** DC 42 # Measurement Accuracy ## What is Measurement Accuracy? Measurement accuracy represents how closely an instrument's reading matches the true value. The higher the accuracy, the closer the flow meter reading is to the actual flow rate. Accuracy is expressed as a percentage, but there are two different calculation methods — and the practical difference between them is significant. *** ## %FS and %OR — Two Ways to Express Accuracy ### Full-Scale Accuracy (%FS) %FS calculates the error based on the **maximum measurable value (full scale)**, regardless of the actual flow rate at the time. This means the error value remains fixed and constant across all flow rates. **Example:** A flow meter with a full scale of 30 L/min and accuracy of ±1% FS: | Flow | Error Value | % of Reading | | -------------------- | ----------- | ------------ | | 30 L/min (full flow) | ±0.3 L/min | ±1% | | 3 L/min (low flow) | ±0.3 L/min | ±10% | At low flow rates, %FS accuracy appears relatively poor compared to the actual reading — this is especially important to note when operating near the lower end of the measurement range. ### Reading Accuracy (%OR / %Rd ) %OR (Of Reading), also referred to as %Rd, calculates the error based on the **actual measured value at the time**, so the error value scales proportionally with the flow rate. **Example:** A flow meter with accuracy of ±2.5% OR: | Flow | Error Value | % of Reading | | -------- | ------------ | ------------ | | 30 L/min | ±0.75 L/min | ±2.5% | | 15 L/min | ±0.375 L/min | ±2.5% | | 3 L/min | ±0.075 L/min | ±2.5% | %OR accuracy maintains proportional consistency across the entire measurement range, making it especially meaningful at low flow rates. *** ### Full Scale (%FS) vs Reading Value (%OR) — Illustration

*** ## FU-ES Measurement Accuracy Specifications FU-ES uses a **dual-range accuracy specification** — applying a different accuracy expression depending on where the actual flow falls within the measurement range. This design ensures the specification is meaningful across the entire operating range. | Flow Range | Accuracy | Method | | ------------------------ | -------- | ---------------------------------------------------------------- | | 10% – 100% of Full Scale | ±3.0% OR | % of Reading — error scales proportionally with actual flow rate | | 0% – 10% of Full Scale | ±0.3% FS | % of Full Scale — fixed error value floor | #### **Why use two methods?** At higher flow rates (above 10% of full scale), expressing accuracy as a percentage of reading (±3.0% OR) is both precise and meaningful — the error naturally scales proportionally with flow. However, at very low flow rates (below 10% of full scale), applying a percentage error to an extremely small value would produce an error value that is too small to reflect actual measurement performance. Using a fixed %FS error floor (±0.3% FS) provides a more realistic accuracy reference at low flow. #### **Practical implication** The key is knowing the 10% FS switchover point for your model — this is the boundary between the two accuracy methods. **To find your model's switchover point:** 1. Locate your model in the reference table below. 2. Take the upper end of the recommended flow range as your full-scale reference value. 3. Multiply by 10% — the result is your switchover point. **Example using FU-ES050 (Full Scale: 1320 L/min):** Switchover point = 10% × 1320 = **132 L/min** | Flow | Range | Applicable Method | Error Value | | ------------------- | ---------------- | ------------------- | ----------- | | 1320 L/min（100% FS） | Above 10% FS | ±3.0% OR | ±39.6 L/min | | 660 L/min（50% FS） | Above 10% FS | ±3.0% OR | ±19.8 L/min | | 132 L/min（10% FS） | Switchover point | ±3.0% OR = ±0.3% FS | ±3.96 L/min | | 66 L/min（5% FS） | Below 10% FS | ±0.3% FS | ±3.96 L/min | | 13.2 L/min（1% FS） | Below 10% FS | ±0.3% FS | ±3.96 L/min | > Note that at the switchover point (132 L/min), both methods produce exactly the same error value — this is by design. The dual-range specification is calibrated to ensure there is no jump or gap in accuracy values at the switchover point, making the transition seamless. *** ### Applying to your model Refer to the table below to find your model's recommended flow range, then calculate the switchover point using the same method. | Model | Recommended Flow Range | 10% FS Switchover Point | | -------- | ---------------------- | ----------------------- | | FU-ES015 | 1.5 – 120 L/min | 12 L/min | | FU-ES020 | 2 – 200 L/min | 20 L/min | | FU-ES025 | 3 – 300 L/min | 30 L/min | | FU-ES032 | 5 – 470 L/min | 47 L/min | | FU-ES040 | 8 – 770 L/min | 77 L/min | | FU-ES050 | 13 – 1320 L/min | 132 L/min | | FU-ES065 | 22 – 1670 L/min | 167 L/min | | FU-ES075 | 30 – 1870 L/min | 187 L/min | > *Measurement accuracy figures are obtained under controlled laboratory conditions, with fixed pipe and fluid conditions, instruments zeroed prior to testing, and tests conducted at 25°C. Although statistical results were obtained under these conditions, accuracy may vary in customer field environments due to differences in fluid type, pipe condition, installation method, and operating temperature.* # Parameters | Serial number | Name | Function | | ------------- | ---------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- | | Z | Easy Setup | Z group has the most commonly used functions in other categories arranged in order to facilitate users to adjust the machine. | | A | Measure | A group is about flow volume measurement | | B | Unit | B group is about unit | | K | Calibration | K group is related to Field Calibration | | C | Total | C group is about accumulated | | D | Alarm & Info (Alarm & Information) | D group is about alarm and notification. | | E | Commute | E group adjust OCT 4-20mA and RS485 | | F | Simulate | F group is about simulation mode for communication and alarm testing. | | H | System | H group is for other host settings | # Z Easy Setup | No. | Name | Description | | --- | -------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Z02 | Auto Pipe Spec |

Automatically detects the pipe specification and jumps to A02 to display the result upon completion.
This function is identical to A01.

Automatically senses the pipe dimensions using patented technology and finds the closest matching pipe specification. If the pipe dimensions are not found in the database or have been altered due to deformation, the default pipe specification will be applied as the configured value.

| | Z03 |

Auto

Initialization

Automatically detects the ultrasonic sound velocity of the fluid under measurement to assist the flowmeter in completing the environmental parameter setup. Execute this function after Mechanical Installation, Electrical Installation, and Parameter Settings are complete.

This function begins execution only after pressing Start. Once executed, it automatically updates the A21 (Auto Initialization) setting.

| | Z04 |

Auto

Zero Offset

Recalibrates the flowmeter's zero point (0 flow), effectively resetting the flowmeter output to zero. During ultra-low flow measurements, setting the zero point helps correct zero-flow offset errors and improves measurement accuracy.

This function begins execution only after pressing Start. Once executed, it automatically updates the A22 (Auto Zero Offset) setting.

| | Z05 | Scale Factor |

Calibrates the flowmeter's measurement accuracy. When there is a systematic deviation between the displayed flow and the actual reference flow, the user can set a scale factor to allow the system to automatically correct the output.

This function multiplies the measured flow data by a fixed factor ranging from +0.001 to +1000, with a default value of +1.0. Once executed, it automatically updates the K03 (Scale Factor) setting.

| # Z02 Auto Pipe Spec ### **Definition** Automatically detects the pipe specification. This function works the same as **A01**. Using patented sensing technology, the system measures the pipe dimensions and automatically selects the closest matching pipe specification from the internal database. If the measured pipe size differs from standard specifications due to pipe deformation, or if the size is not available in the database, the system will apply a **default pipe specification** as the pipe size setting.\ See [**A02** ](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup#a02-preset-pipe-spec-pipe-specification)for reference. ### Notes * Re-execute this function whenever the device is **reinstalled** or the **pipe size or material is changed**. * The system compares the **sensor’s compression under different pipe specifications** with **preset pipe data in the database** to determine the pipe size. * Due to **tolerances or other factors**, the pipe size matching result may be incorrect. * If the pipe size is matched incorrectly, it may cause **inaccurate results**. Be sure to **manually adjust to the correct pipe size** by setting **A02, A04, A06, and A08**. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` Z02 Auto Pipe Spec Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select Z. Easy Setup, press Orange Button (Enter). • Use Gray Arrow Buttons to select Z02 Auto Pipe Spec, press Orange Button (Enter). • Press Right Gray Button to start Auto Pipe Spec. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

# Z03 Auto Initialize ### **Definition** This function automatically detects the ultrasonic velocity of the fluid under test, assisting the flow meter in completing the environmental parameter setup. It is intended to be used after the flow meter’s [**mechanical installation**](/qr/fu-es-echosense-instruction-manual/installation-and-setup/mechanical-installation), [**electrical installation**](/qr/fu-es-echosense-instruction-manual/installation-and-setup/electronic-installation), and [**parameter settings**](/qr/fu-es-echosense-instruction-manual/installation-and-setup/parameter-setup). The function begins execution only after pressing **Start**. Once executed, it automatically updates **A21 (Auto Start-Up Initialization)**. {% hint style="info" %} The Z-series parameter cannot be accessed via Modbus read/write commands in the current version. {% endhint %} ### Notes 1. This procedure must be performed with the **pipeline fully filled with liquid**. Executing Z03 when the pipe is not full may cause flow measurement errors and unstable readings. If this occurs, repeat Z03 under full-pipe conditions. 2. Z03 automatic on-site initialization must always be performed when the pipe is full. The liquid may be either stationary or flowing; this does not affect the result. 3. Each time the flow meter is reinstalled or the pipe size or material is changed, this function should be executed again. 4. The A21 function performs the same operation as Z03; users may choose to execute either one. 5. (Z-series parameters are designed for quick setup, primarily to consolidate multiple essential parameters into a single series for faster installation.) ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` Z03 Auto Initialization Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select Z. Easy Setup, press Orange Button (Enter). • Use Gray Arrow Buttons to select Z03 Auto Initialization, press Orange Button (Enter). • Press Right Gray Button (Set) to start Auto Initialization. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

# Z04 Auto Zero Offset ### Definition This function recalibrates the flow meter zero point (0 flow) by resetting the output to zero.\ For ultra-low flow measurements, zero calibration helps correct zero-offset errors and improves accuracy. The function starts after pressing **Start** and automatically updates **A22 (Auto Zero Offset)** upon completion. **Recommendation**\ It is strongly recommended to execute **Z04** when measuring flow rates below **10% of full scale**, as small zero offsets can cause significant errors at low flow. **Example** * Zero offset: **0.2 L/min** * Actual flow **100 L/min** → error ≈ **0.2%** * Actual flow **0.5 L/min** → error ≈ **40%** {% hint style="info" %} Parameter Z is not supported for Modbus read/write operations in the current version. {% endhint %} ### Notes 1. This step **must be performed when the pipe is completely full and the liquid is fully stationary**. Running **Z04** under non-full or moving-liquid conditions may cause **flow detection errors and unstable readings**. If this occurs, repeat **Z04** under full-pipe conditions. 2. **Re-execute this function whenever the device is reinstalled, or when the pipe size or material changes and the flow reading is below 10% of the maximum range.** 3. **A22** has the same function as **Z04**; users may run either one. (**Z-series parameters** are for **quick setup during installation**, combining multiple required settings for faster configuration.) ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` Z04 Automatic Zero Offset Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select Z. Easy Setup , press Orange Button (Enter). • Use Gray Arrow Buttons to select Z04. Auto Zero Offset , press Orange Button (Enter). • Press Right Gray Button to start Auto Zero Offset. • Device shows “Start auto Zero Offset” when automatic zero-flow begins. • After ~30 seconds, it displays “Set zero offset to ____”. • Then it returns to Z04 Auto Zero Flow, indicating completion. ```

# Z05 Scale Factor ### Definition This function calibrates the flow meter’s accuracy. If the displayed flow differs systematically from a reference value, the user can set a scale factor to automatically correct the output. **Usage:** * The measured flow is multiplied by a fixed factor KKK. * Range: **+0.001 to +1000**, default **+1.0**. * Execution automatically updates **K03 (Scale Factor)**. **Example:** Final Flow=Measured Flow×K\text{Final Flow} = \text{Measured Flow} \times KFinal Flow=Measured Flow×K If actual flow = 101.5 L but meter shows 100 L, set K=1.015K = 1.015K=1.015. {% hint style="info" %} Z-series parameters currently **do not support Modbus read/write**. {% endhint %} ### Notes 1. Z05 cannot accept negative values. 2. To measure reverse flow, enable **A17 Neg Flow (Reverse Flow)**. 3. **K03** serves the same function as **Z05**; users may choose either. Executing this function will automatically update the **Z05 Scale Factor** setting. 4. (Z-series parameters are for quick setup, consolidating multiple essential settings to simplify installation.) ### Operation Procedure ``` Z05 Scale Factor Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select Z. Easy Setup , press Orange Button(Enter). • Use Gray Arrow Buttons to select Z05 Scale Factor, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

# A Measurement Setup | No. | Name | Description | | --- | ------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | A01 | Auto Pipe Spec | Automatically detect pipeline specifications, and automatically jump to A02 to display the results after completion. This function is the same as Z02. | | A02 | Pipe Type |

Select the line model to correct the data. Or select "Custom" to customize the pipe size and material.

(After installation is complete or if the pipeline size or material is changed, please perform Auto Initialize (Z03) and Auto Zero Offset (Z04) again to improve the accuracy of the flow meter readings and ensure product stability.)

| | A03 | Pipe Geo. Unit |

Pipe gauge unit, synchronized with B06.

| | A04 | Pipe OD |

Can be set when A01 is "custom". Dimensions are in accordance with B06. After adjustment, A04 and A06 will be automatically recalculated.

| | A05 | Pipe Perimeter |

Can be set when A01 is "custom". Dimensions are in accordance with B06. After adjustment, A03 and A06 will be automatically recalculated.

| | A06 | Pipe thickness |

Can be set when A01 is "custom". Dimensions are in accordance with B06. A06 will automatically recalculate after adjustment.

| | A07 | Pipe ID |

Can be set when A01 is "custom". Dimensions are in accordance with A02.

| | A08 | Pipe Material |

Set the pipe material, modify the flow data or select "Custom" to customize the sound velocity of the pipe.

| | A09 | Pipe Soundspeed | When A08 is customized, you can manually set the sound velocity of the pipe, and the unit is set in B04. | | A10 | Liq. Type | Select the fluid type to correct the data. Or select "Custom" to customize fluid parameters. | | A11 | Auto Liq. Sound Speed | After enabling this function, the flowmeter will automatically detect the sound velocity of the fluid into the calculation. The default is off. (FW 2.0.0 released.) | | A12 | Liq. Sound Speed | When A10 is customized, the fluid sound velocity can be manually set, and the unit is set in B04. | | A13 | Liq. Dyna. Viscosity | When A10 is customized, the fluid dynamic viscosity can be manually set, and the unit is g/cm3. | | A15 | Damping | Reduce data fluctuations, the lowest is 0, which is off, the default value is 3. | | A16 | Direction | The direction of the fluid can be reversed, and the normal flow direction can be preset. | | A17 | Neg Flow (Negative Flow) | Whether to display negative flow, the default is on. | | A18 | Zero Cutoff | How much flow rate (absolute value) below is displayed as zero, set to 0 means off, default off. | | A19 | Fast Update | Increased screen update rate to every 0.5 seconds. The default is off. | | A20 | Anti-Noise | Eliminates unstable noise in measurement, can be turned off, and is turned on by default. | | A21 | Auto Initialization | Enabling this function will allow the flowmeter to adjust the signal state based on the environmental conditions. Please execute this function once every time you reinstall. This function is the same as Z03. | | A22 | Auto Zero Offset | Please install the pipeline on a pipeline that is still and full inside, and activate this function to correct the zero flow error. This function is synchronized with Z04. | | A23 | Zero Offset | Manually adjust or zero the Zero offset data. | | A24 | Startup Pipe Check | After starting, there will be 5 seconds to confirm whether to use the A01 automatic regulation confirmation function. On by default. | # A01 Auto Pipe Spec This function automatically detects the pipe specification of the pipeline. It performs the same operation as Z02. \ Based on patented sensing technology, it measures the pipe dimensions and automatically identifies the closest matching pipe specification. If the pipe dimensions are not found in the database or have been deformed, the default pipe specification (**CNS PVCU**) will be applied as the configured value. Refer to [A02](/qr/fu-es-echosense-instruction-manual/parameters/a-measurement-setup#a02-preset-pipe-spec-pipe-specification). ### Notes * Re-execute this function whenever the device is **reinstalled** or the **pipe size or material is changed**. * The system compares the **sensor’s compression under different pipe specifications** with **preset pipe data in the database** to determine the pipe size. * Due to **tolerances or other factors**, the pipe size matching result may be incorrect. * If the pipe size is matched incorrectly, it may cause **inaccurate results**. Be sure to **manually adjust to the correct pipe size** by setting **A02, A04, A06, and A08**. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A01 Auto Pipe Spec Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measure, press Orange Button (Enter). • Use Gray Arrow Buttons to select A01 Auto Pipe Spec, press Orange Button (Enter). • Press Right Gray Button to start Auto Pipe Spec. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

# A02 Preset Pipe Spec ### Definition This function is used to select the piping specifications used by the flow meter, with CNS PVCU as the default.

Model (Pipe Diameter)	Pipe Spec Options (Metal)	Pipe Spec Options (Plastic)	Pipe Spec Options (Others)
FU-ES015 (DN15)	Metal ASTM 1/2" Sch40 SS304 JIS G3459 NO.15	Plastic CNS W15 PVCU CNS E15 PVCU JIS K6742 NO.15 ASTM 3/4" Sch40 PVCU ASTM 1/2" Sch80 PVCU ISO 15 PP ISO 15 PVDF	Others Custom
FU-ES020 (DN20)	Metal ASTM 3/4" Sch40 SS304 JIS G3459 NO.20	Plastic CNS W20 PVCU CNS E20 PVCU JIS K6742 NO.20 ASTM 1" Sch40 PVCU ASTM 3/4" Sch80 PVCU ISO 20 PP ISO 20 PVDF	Others Custom
FU-ES025 (DN25)	Metal ASTM 1" Sch40 SS304 JIS G3459 NO.25	Plastic CNS W25 PVCU CNS E25 PVCU JIS K6742 NO.25 ASTM Sch40 PVCU ASTM 1" Sch80 PVCU ISO 25 PP ISO 25 PVDF	Others Custom
FU-ES032 (DN32)	Metal ASTM Sch40 SS304 JIS G3459N 0.32	Plastic CNS W32 PVCU CNS E32 PVCU JIS K6742N 0.32 ASTM Sch40 PVCU ASTM Sch80 PVCU ISO 32 PP ISO 32 PVDF	Others Custom
FU-ES040 (DN40)	Metal ASTM Sch40 SS304 JIS G3459N 0.40	Plastic CNS W40 PVCU CNS E40 PVCU JIS K6742N 0.40 ASTM Sch40 PVCU ASTM Sch80 PVCU ISO 40 PP ISO 40 PVDF	Others Custom
FU-ES050 (DN50)	Metal ASTM Sch40 SS304 JIS G3459 NO.50	Plastic CNS W50 PVCU CNS E50 PVCU JIS K6742 NO.50 ASTM Sch40 PVCU ASTM Sch80 PVCU ISO 50 PP ISO 50 PVDF	Others Custom
FU-ES065 (DN65)	Metal ASTM Sch40 SS304 JIS G3459 NO.65	Plastic CNS W65 PVCU CNS E65 PVCU JIS K6742 NO.65 ASTM Sch40 PVCU ASTM Sch80 PVCU ISO 65 PP ISO 65 PVDF	Others Custom
FU-ES075 (DN75)	Metal ASTM Sch40 SS304 JIS G3459 NO.75	Plastic CNS W75 PVCU CNS E75 PVCU JIS K6742N NO.75 ASTM Sch40 PVCU ASTM Sch80 PVCU ISO 75 PP ISO 75 PVDF	Others Custom

Model (Pipe Diameter)

Pipe Spec Options (Metal)

Pipe Spec Options (Plastic)

Pipe Spec Options (Others)

FU-ES015 (DN15)

Metal

ASTM 1/2" Sch40 SS304
JIS G3459 NO.15

Plastic

CNS W15 PVCU
CNS E15 PVCU
JIS K6742 NO.15
ASTM 3/4" Sch40 PVCU
ASTM 1/2" Sch80 PVCU
ISO 15 PP
ISO 15 PVDF

Others

Custom

FU-ES020 (DN20)

Metal

ASTM 3/4" Sch40 SS304
JIS G3459 NO.20

Plastic

CNS W20 PVCU
CNS E20 PVCU
JIS K6742 NO.20
ASTM 1" Sch40 PVCU
ASTM 3/4" Sch80 PVCU
ISO 20 PP
ISO 20 PVDF

Others

Custom

FU-ES025 (DN25)

Metal

ASTM 1" Sch40 SS304
JIS G3459 NO.25

Plastic

CNS W25 PVCU
CNS E25 PVCU
JIS K6742 NO.25
ASTM Sch40 PVCU
ASTM 1" Sch80 PVCU
ISO 25 PP
ISO 25 PVDF

Others

Custom

FU-ES032 (DN32)

Metal

ASTM Sch40 SS304
JIS G3459N 0.32

Plastic

CNS W32 PVCU
CNS E32 PVCU
JIS K6742N 0.32
ASTM Sch40 PVCU
ASTM Sch80 PVCU
ISO 32 PP
ISO 32 PVDF

Others

Custom

FU-ES040 (DN40)

Metal

ASTM Sch40 SS304
JIS G3459N 0.40

Plastic

CNS W40 PVCU
CNS E40 PVCU
JIS K6742N 0.40
ASTM Sch40 PVCU
ASTM Sch80 PVCU
ISO 40 PP
ISO 40 PVDF

Others

Custom

FU-ES050 (DN50)

Metal

ASTM Sch40 SS304
JIS G3459 NO.50

Plastic

CNS W50 PVCU
CNS E50 PVCU
JIS K6742 NO.50
ASTM Sch40 PVCU
ASTM Sch80 PVCU
ISO 50 PP
ISO 50 PVDF

Others

Custom

FU-ES065 (DN65)

Metal

ASTM Sch40 SS304
JIS G3459 NO.65

Plastic

CNS W65 PVCU
CNS E65 PVCU
JIS K6742 NO.65
ASTM Sch40 PVCU
ASTM Sch80 PVCU
ISO 65 PP
ISO 65 PVDF

Others

Custom

FU-ES075 (DN75)

Metal

ASTM Sch40 SS304
JIS G3459 NO.75

Plastic

CNS W75 PVCU
CNS E75 PVCU
JIS K6742N NO.75
ASTM Sch40 PVCU
ASTM Sch80 PVCU
ISO 75 PP
ISO 75 PVDF

Others

Custom

### Notes 1. Each time the pipeline size is changed, perform **Z03 Auto Initialize** and **Z04 Auto Zero Offset** to ensure accurate flow readings and maintain stable product quality。 2. Tube specifications vary depending on the model and firmware version. Confirm the machine’s model and version to select the correct tube specification table. To check the model and version, follow the steps below:：

H12 System Info	Startup Screen	Device Label
Access parameter H12 – System Info to verify the device model and main unit version. P1205: Device firmware version (identical to the version shown on the startup screen) D1205 and S1101: Hardware version 025: Device model (DN25 pipe size)	The startup screen is displayed for approximately three seconds after the flowmeter is powered on. LORRIC: Trademark FU-ES 025: Device model (DN25 pipe size) P1205 Device firmware version	A label is affixed to the flowmeter housing. FU-ES 025: Device model (DN25 pipe size) 22UD00433 Device serial number • Hardware 1.0/2.0 refers to the product's hardware version. Note: The label may become unreadable over time. It's recommended to record the serial number upon receipt.

H12 System Info

Startup Screen

Device Label

Access parameter H12 – System Info to verify the device model and main unit version.

P1205: Device firmware version (identical to the version shown on the startup screen)
D1205 and S1101: Hardware version
025: Device model (DN25 pipe size)

The startup screen is displayed for approximately three seconds after the flowmeter is powered on.

LORRIC: Trademark
FU-ES 025: Device model (DN25 pipe size)
P1205 Device firmware version

A label is affixed to the flowmeter housing.

FU-ES 025: Device model (DN25 pipe size)
22UD00433 Device serial number

• Hardware 1.0/2.0 refers to the product's hardware version.

Note: The label may become unreadable over time. It's recommended to record the serial number upon receipt.

### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

A02 Present Pipe Spec Setting Steps
• From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight).
• Use Gray Arrow Buttons to select A. Measurement, press Orange Button (Enter).
• Use Gray Arrow Buttons to select A02 Preset Pipe Spec, press Orange Button (Enter).
• Use Gray Arrow Buttons to choose the pipe specification.
• Press Orange Button (Set) to confirm.
• Press Blue Button (ESC) to return to the main screen (green backlight).

### A02 Options and RS485 Values, Read/Write Commands, and Formats Refer to the tube specification table corresponding to the model. #### A02 Pipe Specification — Model FU-ES015, Version P1203 / P1205 Parameter Table

015	RS-485 int
custom	0
CNS W15 PVCU	1
CNS E15 PVCU	2
JIS K6742NO.15	3
ASTM¾"Sch40PVCU	4
ASTM½"Sch40SS304	5
ASTM½"Sch80PVCU	6
JIS G3459NO.15	7
ISO 15 PP	8
ISO 15 PVDF	9

#### A02 Pipe Specification — Model FU-ES020, Version P1203 / P1205 Parameter Table

020	RS-485 int
custom	0 (Default)
CNS W20 PVCU	1
CNS E20 PVCU	2
JIS K6742NO.20	3
ASTM1"Sch40PVCU	4
ASTM¾"Sch40SS304	5
ASTM¾"Sch80PVCU	6
JIS G3459NO.20	7
ISO 20 PP	8
ISO 20 PVDF	9

#### A02 Pipe Specification — Model FU-ES025, Version P1203 / P1205 Parameter Table

020	RS-485 int
custom	0 (Default)
CNS W25 PVCU	1
CNS E25 PVCU	2
JIS K6742NO.25	3
ASTM1"Sch40PVCU	4
ASTM1"Sch40SS304	5
ASTM1"Sch80PVCU	6
JIS G3459NO.25	7
ISO 25 PP	8
ISO 25 PVDF	9

#### A02 Pipe Specification — Model FU-ES032, Version P1203 / P1205 Parameter Table

032	RS-485 int
custom	0 (Default)
CNS W32 PVCU	1
CNS E32 PVCU	2
JIS K6742NO.32	3
ASTMSch40PVCU	4
ASTMSch40SS304	5
ASTMSch80PVCU	6
JIS G3459NO.32	7
ISO 32 PP	8
ISO 32 PVDF	9

#### A02 Pipe Specification — Model FU-ES040, Version P1203 / P1205 Parameter Table

040	RS-485 int
custom	0 (Default)
CNS W40 PVCU	1
CNS E40 PVCU	2
JIS K6742NO.40	3
ASTMSch40PVCU	4
ASTMSch40SS304	5
ASTMSch80PVCU	6
JIS G3459NO.40	7
ISO 40 PP	8
ISO 40 PVDF	9

#### A02 Pipe Specification — Model FU-ES050, Version P1203 / P1205 Parameter Table

050	RS-485 int
custom	0 (Default)
CNS W50 PVCU	1
CNS E50 PVCU	2
JIS K6742NO.50	3
ASTMSch40PVCU	4
ASTMSch40SS304	5
ASTMSch80PVCU	6
JIS G3459NO.50	7
ISO 50 PP	8
ISO 50 PVDF	9

#### A02 Pipe Specification — Model FU-ES065, Version P1203 / P1205 Parameter Table

065	RS-485 int
custom	0 (Default)
CNS W65 PVCU	1
CNS E65 PVCU	2
JIS K6742NO.65	3
ASTMSch40PVCU	4
ASTMSch40SS304	5
ASTMSch80PVCU	6
JIS G3459NO.65	7
ISO 65 PP	8
ISO 65 PVDF	9

#### A02 Pipe Specification — Model FU-ES075, Version P1203 / P1205 Parameter Table

075	RS-485 int
custom	0 (Default)
CNS W75 PVCU	1
CNS E75 PVCU	2
JIS K6742NO.75	3
ASTMSch40PVCU	4
ASTMSch40SS304	5
ASTMSch80PVCU	6
JIS G3459NO.75	7
ISO 75 PP	8
ISO 75 PVDF	9

Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # A03 Pipe Geo Unit ### Definition This function sets the unit for the flow meter’s tube size. The default unit is **mm**. ### Notes 1. After executing this function, the setting for B06 (Tube Size Unit) will be automatically updated. 2. Each time the pipeline size is changed, perform Z03 Auto Initialize and Z04 Auto Zero Offset to ensure accurate flow readings and maintain stable product quality. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A03 Pipe Geo Unit Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement , press Orange Button (Enter). • Use Gray Arrow Buttons to select A03 Pipe Geo Unit, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### A03 **Options, RS485 Values, Read/Write Commands, and Formats** | Options | Description | RS-485 Value | | ------------ | ----------- | ------------ | | mm (Default) | mm | 0 | | inch | inch | 1 | ### **Pipe Size Reference Table (Outer Diameter / Inner Diameter / Wall Thickness / Circumference)** The allowable input ranges for parameters A04 to A07 vary depending on the unit setting of A03 and the device model.\ If values for A04 to A07 are entered first and the unit setting of A03 is changed afterward, the system will automatically perform unit conversion. For example, if A04 (pipe outer diameter) is entered as 1.0 in inch mode and A03 is later switched to mm, the displayed value of A04 will be automatically converted to 25.4. {% hint style="info" %} 1. Since the inner diameter is calculated from the outer diameter and wall thickness (ID = OD − 2 × thickness), all four parameters are interdependent. If an entered value causes any parameter to exceed its allowable range, the system will not permit the value to be saved. 2. All system values are calculated using float32 precision. As a result, displayed or calculated values may include non-integer numbers. 3. Millimeters (mm) are used as the base unit, while inches are provided as converted values (conversion reference: 1 inch = 25.4 mm). 4. If a value exceeds four decimal places, it will be truncated to four decimal places without rounding. {% endhint %} ### FU-ES015 (mm)

Parameter	預設值	最小值	最大值
A04 Pipe OD(Outer Diameter) 管路外徑	22	15	30
A05 Pipe Perimeter 管路圓周	69.08	47.1	94.2
A06 Pipe thickness 管路厚度	2.7	0.5	5
A07 Pipe ID(Inner Diameter)	16.6	5	29

### FU-ES020 (mm)

Parameter	預設值	最小值	最大值
A04 Pipe OD(Outer Diameter) 管路外徑	26	18	35
A05 Pipe Perimeter 管路圓周	81.64	56.52	109.9
A06 Pipe thickness 管路厚度	2.7	0.8	5.5
A07 Pipe ID(Inner Diameter)	20.6	7	33.4

### FU-ES025 (mm)

Parameter	預設值	最小值	最大值
A04 Pipe OD(Outer Diameter) 管路外徑	32	24	43
A05 Pipe Perimeter 管路圓周	100.48	75.36	135.02
A06 Pipe thickness 管路厚度	3.2	1	6
A07 Pipe ID(Inner Diameter)	25.6	12	41

### FU-ES032 (mm)

Parameter	預設值	最小值	最大值
A04 Pipe OD(Outer Diameter) 管路外徑	38	30	53
A05 Pipe Perimeter 管路圓周	119.32	94.2	166.42
A06 Pipe thickness 管路厚度	3.2	1	6
A07 Pipe ID(Inner Diameter)	31.6	18	51

### FU-ES040 (mm)

Parameter	預設值	最小值	最大值
A04 Pipe OD(Outer Diameter) 管路外徑	48	36	65
A05 Pipe Perimeter 管路圓周	150.72	113.04	204.1
A06 Pipe thickness 管路厚度	3.7	1	6.5
A07 Pipe ID(Inner Diameter)	40.6	23	63

### FU-ES050 (mm)

Parameter	預設值	Minimum	最大值
A04 Pipe OD(Outer Diameter)	60	46	78
A05 Pipe Perimeter	188.4	144.44	244.92
A06 Pipe thickness	4.1	1	8
A07 Pipe ID(Inner Diameter)	51.8	30	76

### FU-ES065 (mm)

Parameter	預設值	Minimum	最大值
A04 Pipe OD(Outer Diameter)	76	58	92
A05 Pipe Perimeter	238.64	182.12	288.88
A06 Pipe thickness	4.1	1.4	10
A07 Pipe ID(Inner Diameter)	67.8	38	89.2

### FU-ES075 (mm)

Parameter	預設值	Minimum	最大值
A04 Pipe OD(Outer Diameter)	89	70	120
A05 Pipe Perimeter	279.46	219.8	376.8
A06 Pipe thickness	5.4	1.5	12
A07 Pipe ID(Inner Diameter)	78.2	46	117

## A03 為 inch 模式時A04\~A07參數輸入範圍 ### FU-ES015 (inch)

Parameter	預設值	Minimum	最大值
A04 Pipe OD(Outer Diameter)	0.866	0.591	1.181
A05 Pipe Perimeter	2.720	1.854	3.709
A06 Pipe thickness	0.106	0.02	0.197
A07 Pipe ID(Inner Diameter)	0.654	0.197	1.142

### FU-ES020 (inch)

Parameter	預設值	Minimum	最大值
A04 Pipe OD(Outer Diameter)	1.024	0.709	1.378
A05 Pipe Perimeter	3.214	2.225	4.327
A06 Pipe thickness	0.106	0.031	0.217
A07 Pipe ID(Inner Diameter)	0.811	0.276	1.315

### FU-ES025 (inch)

Parameter	Default	Minimum	Maximum
A04 Pipe OD(Outer Diameter)	1.260	0.945	1.693
A05 Pipe Perimeter	3.956	2.967	5.316
A06 Pipe thickness	0.126	0.039	0.236
A07 Pipe ID(Inner Diameter)	1.008	0.472	1.614

### FU-ES032 (inch)

Parameter	Default	Minimum	Maximum
A04 Pipe OD(Outer Diameter)	1.496	1.181	2.087
A05 Pipe Perimeter	4.698	3.709	6.552
A06 Pipe thickness	0.126	0.039	0.236
A07 Pipe ID(Inner Diameter)	1.244	0.709	2.008

### FU-ES040 (inch)

Parameter	Default	Minimum	Maximum
A04 Pipe OD(Outer Diameter)	1.890	1.417	2.559
A05 Pipe Perimeter	5.934	4.45	8.035
A06 Pipe thickness	0.146	0.039	0.256
A07 Pipe ID(Inner Diameter)	1.598	0.906	2.48

### FU-ES050 (inch)

Parameter	Default	Minimum	Maximum
A04 Pipe OD(Outer Diameter)	2.362	1.811	3.071
A05 Pipe Perimeter	7.417	5.687	9.643
A06 Pipe thickness	0.161	0.039	0.315
A07 Pipe ID(Inner Diameter)	2.039	1.181	2.992

### FU-ES065 (inch)

Parameter	Default	Minimum	Maximum
A04 Pipe OD(Outer Diameter)	2.992	2.283	3.622
A05 Pipe Perimeter	9.395	7.17	11.373
A06 Pipe thickness	0.161	0.055	0.394
A07 Pipe ID(Inner Diameter)	2.669	1.496	3.512

### FU-ES075 (inch)

Parameter	Default	Minimum	Maximum
A04 Pipe OD(Outer Diameter)	3.504	2.756	4.724
A05 Pipe Perimeter	11.002	8.654	14.835
A06 Pipe thickness	0.213	0.059	0.472
A07 Pipe ID(Inner Diameter)	3.079	1.811	4.606

Pipe OD	DN15	DN20	DN25	DN32
Default mm	22	26	32	38
inch	0.866	1.024	1.260	1.496
Minimum mm	15	18	24	30
inch	0.591	0.709	0.945	1.181
Maximum mm	30	35	43	53
inch	1.181	1.378	1.693	2.087

Pipe OD	DN40	DN50	DN65	DN75
Default mm	48	60	76	89
inch	1.890	2.362	2.992	3.504
Minimum mm	36	46	58	70
inch	1.417	1.811	2.283	2.756
Maximum mm	65	78	92	120
inch	2.559	3.071	3.622	4.724

{% hint style="info" %} 1. Millimeters (mm) are used as the base unit, while inches are provided as converted values (conversion reference: 1 inch = 25.4 mm). 2. If a value exceeds four decimal places, it will be truncated to four decimal places without rounding. {% endhint %} ### Notes 1. Pipe size units are determined by **B06 (Pipe Size Unit)**. 2. Each time the pipe size is changed, please re-execute **Z03 Auto Initialize** and **Z04 Auto Zero Offset** to improve measurement accuracy and ensure stable product performance. 3. On certain firmware versions, a pipe material confirmation page will appear after setting **A04 Pipe Wall Thickness**. Please select the matching pipe material or choose **Custom**. If a predefined pipe material is selected, **A08 (Pipe Material)** will be synchronized automatically. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A04 Pipe Outer Diameter Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A04 Pipe Outer Diameter, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • On certain versions, a “Pipe Material Confirmation” screen will be displayed. • Use the gray arrow keys to select the matching pipe material or Custom, then press the orange Set key to confirm. • Press Blue Button(ESC) to return to the main screen(green backlight). ```

### A04 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 Value | | ----------------------------- | ------------------------ | ------------ | | Custom | Refer to the table above | - | | Minimum | | - | | Maximum | | - | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format # A05 Pipe Perimeter ### Definition Set the pipe circumference. Default values vary depending on the selected pipe unit.

Pipe OD	DN15	DN20	DN25	DN32
Default mm	69.08	81.64	100.4	119.32
inch	2.720	3.214	3.956	4.698
Minimum mm	47,1	56.52	75.36	94.2
inch	1.854	2.225	2.967	3.709
Maximum mm	94.2	109.9	135.02	166.42
inch	3.709	4.327	5.316	6.552

Pipe OD	DN40	DN50	DN65	DN75
Default mm	150.72	188.4	238.64	279.46
inch	5.934	7.417	9.395	11.002
Minimum mm	113.04	144.44	182.12	219.8
inch	4.45	5.687	7.17	8.654
Maximum mm	204.1	244.92	288.88	376.8
inch	8.035	9.643	11.373	14.835

### Notes 1. Pipe size units are determined by **B06 (Pipe Size Unit)**. 2. Each time the pipe size is changed, please re-execute **Z03 Auto Initialize** and **Z04 Auto Zero Offset** to improve measurement accuracy and ensure stable product performance. 3. On certain firmware versions, a pipe material confirmation page will appear after setting **A05 Pipe Wall Thickness**. Please select the matching pipe material or choose **Custom**. If a predefined pipe material is selected, **A08 (Pipe Material)** will be synchronized automatically. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A05 Pipe Perimeter Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A05 Pipe Perimeter , press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • On certain versions, a “Pipe Material Confirmation” screen will be displayed. • Use the gray arrow keys to select the matching pipe material or Custom, then press the orange Set key to confirm. • Press Blue Button(ESC) to return to the main screen(green backlight). ```

## A05 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 Value | | ----------------------------- | ------------------------ | ------------ | | Custom | Refer to the table above | - | | Minimum | | - | | Maximum | | - | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # A06 Pipe Thickness ### Definition Set the pipe wall thickness. Default values vary depending on the selected pipe unit.

Pipe OD	DN15	DN20	DN25	DN32
Default mm	2.7	2.7	3.2	3.2
inch	0.106	0.106	0.126	0.126
Minimum mm	0.5	0.8	1	1
inch	0.02	0.031	0.039	0.039
Maximum mm	5	5.5	6	6
inch	0.197	0.217	0.236	0.236

Pipe OD	DN40	DN50	DN65	DN75
Default mm	3.7	4.1	4.1	5.4
inch	0.146	0.161	0.161	0213
Minimum mm	1	1	1.4	1.5
inch	0.039	0.039	0.055	0.059
Maximum mm	6.5	8	10	12
inch	0.256	0.315	0.394	0.472

### Notes 1. Pipe size units are determined by **B06 (Pipe Size Unit)**. 2. Each time the pipe size is changed, please re-execute **Z03 Auto Initialize** and **Z04 Auto Zero Offset** to improve measurement accuracy and ensure stable product performance. 3. On certain firmware versions, a pipe material confirmation page will appear after setting **A06 Pipe Wall Thickness**. Please select the matching pipe material or choose **Custom**. If a predefined pipe material is selected, **A08 (Pipe Material)** will be synchronized automatically. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A06 Pipe Thickness Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A06 Pipe Thickness, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • On certain versions, a “Pipe Material Confirmation” screen will be displayed. • Use the gray arrow keys to select the matching pipe material or Custom, then press the orange Set key to confirm. • Press Blue Button(ESC) to return to the main screen(green backlight). ```

## A06 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 Value | | ----------------------------- | ------------------------ | ------------ | | Default | Refer to the table above | - | | Minimum | | - | | Maximum | | - | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # A07 Pipe Inner Diameter ### Definition Set the pipe inner diameter. Default values vary depending on the selected pipe unit.

Inner Diameter	DN15	DN20	DN25	DN32
Default (mm)	16.6	20.9	25.6	31.6
inch	0.654	0.811	1.008	1.244
Minimum (mm)	5	7	12	18
inch	0.197	0.276	0.472	0.709
Maximum (mm)	29	33.4	41	51
inch	1.142	1.315	1.614	2.008

Inner Diameter	DN40	DN50	DN65	DN75
Default (mm)	40.6	51.8	67.8	78.2
inch	1.598	2.039	2.669	3.079
Minimum (mm)	23	30	38	46
inch	0.906	1.181	1.496	1.811
Maximum (mm)	63	76	89.2	117
inch	2.48	2.992	3.512	4.606

### Notes 1. Pipe size units are determined by **B06 (Pipe Size Unit)**. 2. Each time the pipe size is changed, please re-execute **Z03 Auto Initialize** and **Z04 Auto Zero Offset** to improve measurement accuracy and ensure stable product performance. 3. On certain firmware versions, a pipe material confirmation page will appear after setting **A07 Pipe Wall Thickness**. Please select the matching pipe material or choose **Custom**. If a predefined pipe material is selected, **A08 (Pipe Material)** will be synchronized automatically. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A07 Pipe Inner Diameter Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A07 Pipe Inner Diameter, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • On certain versions, a “Pipe Material Confirmation” screen will be displayed. • Use the gray arrow keys to select the matching pipe material or Custom, then press the orange Set key to confirm. • Press Blue Button(ESC) to return to the main screen(green backlight). ```

## A07 Options, RS485 Values, Read/Write Commands, and Formats | Refer to the table above | Refer to the table above | Refer to the table above | | ------------------------ | ------------------------ | ------------------------ | | Custom | Refer to the table above | - | | Minimum | | - | | Maximum | | - | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # A08 Pipe Material ### Definition Set the pipe material. Default: custom.


DN25	DN32	DN40	DN50	DN60	DN75	尺寸
PVCU	PVC	PVC	PVC	PVC	PVC	預設值

### Notes 1. On certain models, a **“Pipe Material Confirmation”** screen will appear after adjusting **A04, A05, A06, or A07**. If the pipe material is modified on this screen, **A08** will be updated automatically. 2. Each time the pipe material is changed, please re-execute **Z03 Auto Initialize** and **Z04 Auto Zero Offset** to improve measurement accuracy and ensure stable product performance. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A08 Pipe Material Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button (Enter). • Use Gray Arrow Buttons to select A08 Pipe Material , press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

## A08 Options, RS485 Values, Read/Write Commands, and Formats

Options	Description	RS-485 Value
Custom	Default	0
PVCU (Default)		1
PVC		2
PP		3
PVDF		4
ABS		5
Steel	Steel	6
SUS 304	Stainless Steel 304	7
SUS 316	Stainless Steel 316	8

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A09 Pipe Soundspeed Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A09 Pipe Soundspeed, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

## A09 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 Value | | ----------------------------- | -------------------- | ------------ | | Default | 2300 | - | | Minimum | 500 | - | | Maximum | 10000 | - | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # A10 Liquid Type ### Definition Set the liquid type. Default: custom. ### Notes {% hint style="info" %} N/A {% endhint %} ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A10 Liquid Type Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement , press Orange Button (Enter). • Use Gray Arrow Buttons to select A10 Liquid Type, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

## A10 Options, RS485 Values, Read/Write Commands, and Formats

Option	Description	RS-485 Value
Custom (Custom)	Custom	0
Water 20℃	68°F	1
Water 50℃	122°F	2
Water 75℃	167°F	3
Water 100℃	212°F	4
Water 125℃	257°F	5
Water 150℃	302°F	6
Water 175℃	347°F	7
Water 200℃	392°F	8
Water 225℃	437°F	9
Acetone		10
Carbinol		11
Ethanol		12
Alcohol		13
Acetaldehyde		14
Arachis Oil		15
Glycerin		16
Gasoline		17
Benzene		18
Ethyl Benzene		19
Toluene		20
Chloromethane		21
Petroleum		22
Pine Oil		23
Cloroethylene		24
Ketone		25
Glycol		26
Sea Water		27

> Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # A12 Liquid Soundspeed ### Definition Set the liquid Soundspeed. Default: 1482. {% hint style="info" %} The sound speed of a fluid varies with temperature. Please refer to the [**Liquid Temperature vs. Sound Speed Reference Table**](https://www.lorric.com/en/Articles/Industrial-database/all/sound-speeds-data-liquid). {% endhint %} ### Definition 1. When the user sets **A10 (Fluid Type)**, **A12 (Fluid Sound Speed)** will be updated accordingly based on the A10 selection. 2. The unit of **A12** is determined by **B04 (Flow and Sound Speed Unit)**. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A12 Liquid Soundspeed Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A12 Liquid Soundspeed, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

### A12 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 Value | | ----------------------------- | -------------------- | ------------ | | Default | 1482 | - | | Minimum | 100 | - | | Maximum | 3000 | - | > Refer to the[ Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # A13 K.Viscosity cst ### Definition Set the fluid dynamic viscosity. Default: 1. ### Notes When the user sets **A10 (Fluid Type)**, **A13 (Fluid Dynamic Viscosity)** will be updated accordingly based on the A10 selection. ### Operation Procedure

Button Functions (Click to Expand)

The main unit has **four buttons**. The **bottom line (Line 3)** of the LCD displays the current function of each button. Under normal operation, the button functions are as follows: *

**Blue Button -** Leftmost button: Return, exit, or save settings. Gray Arrow Buttons: *

**Left Gray Button:** Previous Page, decrease value, or select item *

**Right Gray Button:** Next Page, increase value, or select item *

**Orange Button:** Rightmost button: Enter settings, edit, or confirm selection {% hint style="danger" %} **Do not hold buttons for extended periods to avoid damage.** {% endhint %} {% hint style="info" %} Button functions may change depending on the operation context to improve usability or prevent accidental presses. {% endhint %}

``` A13 K.Viscosity cST Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A06 Pipe Thickness, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

### A13 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 value | | ----------------------------- | -------------------- | ------------ | | Default | 1 | - | | Minimum | 0.05 | - | | Maximum | 20000 | - | > Refer to the[ Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # A15 Damping ### Definition * A15 Damping: Smooths flow measurement data. Default: 3. * Higher value → smoother display, smaller fluctuations, slower response. * Lower value → faster response, more sensitive to flow disturbances, larger fluctuations. ### Notes 1. **Process Monitoring Application:** It is recommended to set **A15** higher than the default value to improve display stability and readability, reducing the effect of short-term fluctuations on the displayed value. 2. **Process Control Application:** It is recommended to set **A15** lower than the default value to minimize measurement delay, allowing flow changes to be reflected in the control system in real time. 3. **Function Description:** **A15** only affects the smoothness of the display and output; it does not affect the actual measurement accuracy of the flowmeter. 4. **Setting Confirmation:** After adjusting **A15**, it is recommended to observe the system operation for several minutes to verify that the setting meets the application requirements. 5. **Usage Reminder:** Setting **A15** too high may cause delayed response to flow changes. Adjust according to the actual application scenario. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A15 Damping Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A15 Damping, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

### A15 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 value | | ----------------------------- | -------------------- | ------------ | | Default | 3 | - | | Minimum | 0 | - | | Maximum | 600 | - | > Refer to the[ Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram) for the Modbus command format. This parameter uses the int16 data format. # A16 Direction ### Definition Reverse flow definition. Default: normal flow. ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A16 Direction Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measure , press Orange Button (Enter). • Use Gray Arrow Buttons to select A16 Direction, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### A16 Options, RS485 Values, Read/Write Commands, and Formats

Options	Description	RS-485 value
Normal (Default)	Forward Flow: Water flows in the positive direction as defined by the flowmeter.	0
Inverse	Reverse Flow: Water flows in the negative direction as defined by the flowmeter.	1

> Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # A17 Neg Flow ### Definition Enable display of reverse flow. Default: on. ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A17 Neg Flow Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measure , press Orange Button (Enter). • Use Gray Arrow Buttons to select A17 Neg Flow, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### A17 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 value | | ------------ | ----------- | ------------ | | OFF | - | 0 | | ON (Default) | - | 1 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # A18 Low Flow Cutoff ### Definition This function forces the flowmeter to display flow values below a set threshold as **0**. The default value is **0**, which disables the function. When **A18 Low Flow Cutoff** is disabled, small near-zero measurement fluctuations may be displayed, causing slight value variations when the system is stopped. To display a stable **zero flow** when the system is stopped, enable **A18** to force flow values below the threshold to zero, preventing zero drift and minor measurement disturbances. ### Notes 1. The default value is **0**, which means the function is disabled and the flowmeter will display actual small flow values. 2. The condition **“below the set value”** is evaluated using the **absolute value** of the flow rate. Regardless of forward or reverse flow, any value lower than the set threshold will be displayed as **0**. 3. **A18 is a hard cutoff for both display and output.** When the actual flow rate is lower than the A18 setting, the flowmeter will display **0** and no flow variation within this range will be output. 4. If the application requires measurement of small flow fluctuations near zero, the measured flow value **must be greater than the A18 setting**. Otherwise, the flow will be treated as **0** and cannot be measured or recorded. 5. **Setting Recommendations** * **General process display / PLC false-trigger prevention:**\ Set **A18** close to the lower measurement limit of the flowmeter model to improve zero stability. * **Low-flow detection / micro-flow research applications:**\ It is recommended to disable **A18 (A18 = 0)** to preserve full measurement information near zero flow. **\******Lower measurement limit*** | | | | | | | | | | | ----------------------- | ------- | ----- | ----- | ----- | ----- | ------ | ------ | ------ | | Pipe Size | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 | DN65 | DN75 | | Lower measurement limit | 1.5 LPM | 2 LPM | 3 LPM | 5 LPM | 8 LPM | 13 LPM | 22 LPM | 30 LPM | ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A18 Low flow cutoff Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A18 Low flow cutoff, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

### A18 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 Value | | ----------------------------- | -------------------- | ------------ | | Custom | 0 | - | | Minumum | 0 | - | | Maximum | 150,000,000 | - | > Refer to the[ Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # A19 Fast Update ### Definition This function increases the flowmeter display update rate to once every **0.5 seconds**. The default setting is **disabled**.

Pulse Output – Pulse V2 Function (Click to Expand)

### 1. Technical Principle: Pulse V2 “Batch Reporting” Mechanism Pulse V2 differs from traditional continuous variable-frequency pulse output. It uses a **periodic pulse burst** mechanism.\ At the end of each update cycle, the system converts the accumulated flow into a burst of pulses and transmits them in a short period of time. **A19 Defines the “Reporting Cycle”:** * **A19 = 1.0 s (Default):**\ Flow is accumulated every 1 second, and the corresponding pulse burst is transmitted during the following 1 second. * **A19 = 0.5 s (High-speed):**\ Flow is accumulated every 0.5 seconds, and the corresponding pulse burst is transmitted during the following 0.5 seconds. *** ### 2. Parameter Configuration Table | Parameter Code | Name | Function Description | Setting Recommendation | | -------------- | ------------- | ---------------------- | ------------------------------------------------------------------------------------------------------------------------------- | | A19 | Fast Update | Flow Calculation Cycle |

1.0 s: Suitable for general PLC applications.
0.5 s: Suitable for high-precision or high-speed counting applications.

| | E02 | OCT Info | Output Mode Selection | Pulse V2 must be selected. | | E14 | Pulse V2 Unit | Flow per Pulse | Determines the resolution (e.g., 0.1 represents 0.1 L/pulse). | | E03 | Pulse Width | Signal Duration | Determines whether the PLC can correctly capture the signal. | *** ### 3. Core Steps: Settings Based on PLC Type **Option A: Connected to General PLC Input (Common DI)** * **Applicable for:** PLCs without high-speed counting modules or with slow scan cycles (>10 ms). * **A19 (Update Frequency):** Recommended **1.0 s** (updates once per second). * **E14 (Resolution):** Recommended **large** (e.g., 0.1 or 1.0). * **E03 (Pulse Width):** Recommended **50 ms**. * **Limitation:** When the flow rate is high, the total number of pulses should not be too large, otherwise all pulses may not be transmitted within 1 second. **Option B: Connected to PLC High-Speed Counting Module (HSC)** * **Applicable for:** Precise quantitative control and high-resolution monitoring. * **A19 (Update Frequency):** Can be set to **0.5 s** (updates every 0.5 seconds). * **E14 (Resolution):** Can be set **small** (e.g., 0.01 or 0.001). * **E03 (Pulse Width):** Recommended **0.5 ms** (default) or **1 ms**. * **Limitation:** Although HSC can read high-frequency signals, it must still ensure that all pulses can be transmitted within 0.5 seconds. *** ### 4. Frequency Safety Check (Error Prevention Calculation) To prevent **signal overlap (“traffic jam”)** that may cause the PLC to miss pulses, the following calculation should be performed: verify whether the **pulse burst** generated at maximum flow can be fully transmitted within the **A19 reporting cycle**. #### 1. Calculate the Number of Pulses per Cycle (N) First, calculate the maximum number of pulses the flowmeter can generate within one update cycle: $$N = \frac{(\mathrm{Maximum\ LPM} / 60) \times \mathrm{A19\ Cycle\ (s)}}{E14}$$ #### 2. Determine Safety Standard To ensure sufficient spacing between pulses (recommended **50% duty cycle**), the following condition must be met: $$N×(E03×2)< A19 cycle (s)$$ > 💡 **Why multiply by 2?** > > A complete pulse cycle consists of **high-level time (E03)** and **low-level interval time**. To ensure stable detection by the receiving device (PLC), it is generally recommended that the interval time be at least equal to the pulse width. *** #### Example Scenario Calculation Assume the following site conditions and settings: * **Maximum Flow:** 60 LPM * **A19 (Cycle Time):** 1.0 s * **E14 (Pulse Unit):** 0.1 L/pulse * **E03 (Pulse Width):** 50 ms (0.05 s) **Step 1: Calculate Number of Pulses** $$N = \frac{(60 \div 60) \times 1.0}{0.1} = 10 \text{ (pulse)}$$ **Step 2: Check Safety Standard** $$10 \times (0.05 \times 2) = 1.0\text{s}$$ **Result Evaluation:**\ The calculated transmission time is **1.0 s**, exactly equal to the A19 cycle time. This indicates that the signal is at the **“limit”** state, with almost no extra spacing between pulses. If the actual flow exceeds 60 LPM, pulses may overlap, causing the PLC to miss counts. **Optimization Suggestions:** * **Option A:** Increase **E14** (e.g., set to 0.2) to reduce the number of pulses by half. * **Option B:** Decrease **E03** (e.g., set to 20 ms) to shorten the duration of each pulse. *** ### 5. Troubleshooting **Q1: The panel shows flow, but the PLC does not receive any values** * **Cause A:** **E03 (Pulse Width)** is set too short and is filtered out by the PLC.\ **Solution:** Increase **E03** to 50 ms. * **Cause B:** **E02** is not set to **Pulse V2**. **Q2: PLC misses counts or stops increasing at high flow rates** * **Cause:** Signal overlap. Pulses are too wide and dense, causing the high-level signal to “stick” and form a straight line.\ **Solution A:** Increase **E14** (e.g., 0.01 → 0.1) to reduce the total number of pulses.\ **Solution B:** Decrease **E03** (e.g., 10 ms → 1 ms) to increase spacing between pulses. **Q3: PLC cumulative value does not match the flowmeter panel** * **Cause:** Pulse frequency approaches the PLC’s sampling limit, causing occasional missed counts. * **Solution:** Increase **E14** to use a larger pulse unit (e.g., change from 1 mL/pulse to 10 mL/pulse).

### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A19 Fast Update Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measure , press Orange Button (Enter). • Use Gray Arrow Buttons to select A19 Fast Update, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

| Options | Description | RS-485 Value | | ------------- | ----------- | ------------ | | OFF (Default) | - | 0 | | ON | - | 1 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # A20 Anti Noise ### Definition This function filters out unstable measurement noise. It can be **disabled**, and the default setting is **enabled**. ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A20 Anti-Noise Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measure , press Orange Button (Enter). • Use Gray Arrow Buttons to select A20 Anti-Noise, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### A20 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ------------- | ----------- | ------------ | | Off | - | 0 | | Low (Default) | - | 1 | | High | - | 2 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # A21 Auto Initialize ### Definition Auto-detect fluid ultrasonic velocity to complete environmental parameter setup after [mechanical installation](/qr/fu-es-echosense-instruction-manual/installation-and-setup/mechanical-installation), [electrical installaton](/qr/fu-es-echosense-instruction-manual/installation-and-setup/electronic-installation) and [parameter settings](/qr/fu-es-echosense-instruction-manual/installation-and-setup/parameter-setup). The function starts only after pressing **Start**. Upon execution, it will automatically update the **Z03 (Auto Initialization)** settings. {% hint style="info" %} Currently, **A21** does not support Modbus read/write command operation. {% endhint %} ### Notes 1. This step **must be performed when the pipeline is fully filled with liquid**. If **A21** is executed when the pipeline is not full, it may cause flow measurement errors and fluctuating readings. If this occurs, repeat **A21** under fully filled conditions. 2. The **Auto Initialization** of **A21** must be performed with the pipeline full. Whether the fluid is **flowing or stationary** does not affect the result. 3. **Each time the system is reinstalled or the pipeline size/material is changed, this function should be executed again.** 4. The **A21** function is equivalent to **Z03**, and the user may choose to execute either one.\ *(Z-series parameters are designed for quick setup, mainly during installation, consolidating multiple necessary parameters into a single series for faster completion.)* ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A21 Auto Initialize Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measure , press Orange Button (Enter). • Use Gray Arrow Buttons to select A21 Auto Initialize, press Orange Button (Enter). • Press Right Gray Button (Set) to start Auto Initialization. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

# A22 Auto Zero Offset ### Definition Recalibrates the flowmeter zero point, resetting the output to zero. Recommended for ultra-low flow measurement to correct zero-flow offset errors and improve measurement accuracy. Starts only after pressing **Start** and automatically updates the **Z04 (Auto Zero Flow)** settings. It is recommended to perform **Z04** when measuring ultra-low flow (below 10% of the maximum range), as small zero-point offsets can cause significant errors at low flow. **Example:** With a zero-point offset of 0.2 L/min: * At an actual flow of 100 L/min, the error is approximately 0.2%. * At an actual flow of 0.5 L/min, the error can reach nearly 40%. {% hint style="info" %} Currently, **A22** does not support Modbus read/write command operation. {% endhint %} ### Notes 1. Perform **A22** when the pipeline is **fully filled with liquid and the liquid is completely stationary**. Performing Z04 when the pipe is not full may cause flow measurement errors and unstable readings; if this occurs, repeat Z04 under full-pipe conditions. 2. **Repeat this procedure after every reinstallation or when changing pipe size or material.** 3. The **A22** function is equivalent to **Z04**; users can choose either.\ (Z-series parameters are designed for quick setup, consolidating multiple essential settings to streamline installation.) ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A22 Automatic Zero Offset Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select Z. Easy Setup , press Orange Button (Enter). • Use Gray Arrow Buttons to start Automatic Zero Offset • Device shows “Start auto Zero Offset” when automatic zero-flow begins. • After ~30 seconds, it displays “Set zero offset to ____”. • Then it returns to Z04 Auto Zero Flow, indicating completion. ```

# A23 Zero Offset ### Definition This function performs **manual zero-point compensation** to correct internal system timing offsets. The setting unit is **ns (nanoseconds)**, not a flow unit. To configure, refer to the value displayed at the **bottom-left of the main screen User Debug Page**, and enter that value into **A23**. **User Debug Page** 1. Make sure [**H10 Debug Page**](/qr/fu-es-echosense-instruction-manual/parameters/h-system/h10-debug-page) is turned on. 2. Return to the main screen and use the arrow keys to navigate to the **User Debug Page**. 3. Observe the value in the bottom-left (marked in red). The value may fluctuate slightly; it is recommended to observe for a while and enter the **average value** into **A23**.

**Debug Screen** *(actual values may vary depending on conditions)*

### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A23 Zero Offset Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button(Enter). • Use Gray Arrow Buttons to select A23 Zero Offset, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ``` ### A23 Options, RS485 Values, Read/Write Commands, and Formats | Input Range of This Parameter | Corresponding Values | RS-485 Value | | ----------------------------- | -------------------- | ------------- | | Default | 0 | - | | Minimum | -100 | - | | Maximum | 100 | - | Refer to the [Read/Write Memory](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram) List for the Modbus command format. This parameter uses the float32 data format. # A24 Start up check ### Definition When this function is enabled, a 5-second confirmation prompt will appear on startup asking whether to run the A01 Auto Pipe Spec Detection function. Default: Off. ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` A24 Startup Check Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select A. Measurement, press Orange Button (Enter). • Use Gray Arrow Buttons to select A24 Startup Check, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### A24 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ------------- | ----------- | ------------ | | OFF (Default) | - | 0 | | ON | - | 1 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # A25 Off-pipe zero For original factory use only, please do not modify. # A26 Beta Mode For original factory use only, please do not modify. # B Unit | No. | Name | Description | | --- | ------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | B01 | Vol. Unit (Volume Unit) |

Unit of instantaneous flow speed, default liter.

Metric: L, m3

Imperial: U.gal (US Gallon)、I.gal (Imperial Gallon), ft3

Unit of cumulative and history flow volume, default litre.

Metric: L, m3

Imperial: U.gal (US Gallon)、I.gal (Imperial Gallon), ft3

| | B04 | VelocityUnit |

Unit of flow speed, default m/s.

Metric: m/s

Imperial: ft/s

| | B05 |

Dec. Place
(Decimal Place)

For setting digits displayed after the decimal point on LCD and LED by using the round down method. The maximum number of digits is 4 digits.

The default display shows 4 digits after the decimal. Cumulative flow volume is still calculated by using the original value.

| | B06 | Pipe Geo. Unit | Pipe gauge unit, synchronized with A03 | # B01 Vol.Unit ### Definition Sets the flowmeter’s instantaneous flow volume unit. Default: L (liter). ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` B01 Vol. Unit Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select B.Unit , press Orange Button (Enter). • Use Gray Arrow Buttons to select B01 Vol. Unit, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

| Options | Description | RS-485 Numbers | | ----------- | ----------- | -------------- | | L (Default) | Default | 0 | | m³ | | 1 | | US gal | US Gallon | 2 | | Imp gal | UK Gallon | 3 | | *ft*³ | | 4 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # B02 Time Unit ### Definition Sets the time unit for instantaneous flow. Default: minute. ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` B02 Time Unit Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select B. Unit , press Orange Button (Enter). • Use Gray Arrow Buttons to select B02 Time Unit, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### B02 Options, RS485 Values, Read/Write Commands, and Formats | Option | Description | RS-485 Value | | ---------------- | ----------- | ------------ | | Second | - | 0 | | Minute (Default) | - | 1 | | Hour | - | 2 | | Day | - | 3 | > Refer to the[ Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # B03 Total Unit ### Definition Sets the volume unit for cumulative and historical flow. Default: L (liter). ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` B03 Total Unit Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select B. Unit , press Orange Button (Enter). • Use Gray Arrow Buttons to select B03 Total Unit, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ``` ### B03 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ----------- | --------------- | ------------ | | L (Default) | - | 0 | | m³ | - | 1 | | US gal | US Gallon | 2 | | Imp gal | Imperial Gallon | 3 | | *ft*³ | - | 4 | > Refer to the [Read/Write Memory List ](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list)for the Modbus command format. This parameter uses the Int16 data format. # B04 VelocityUnit ### Definition Sets the flow velocity and sound speed unit. Default: m/s (meter per second). ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` B04 Velocity Unit Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select B.Unit , press Orange Button (Enter). • Use Gray Arrow Buttons to select B04 Velocity Unit, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### B04 Options, RS485 Values, Read/Write Commands, and Formats

Option	Description	RS-485 Value
m/s (Default)	-	0
ft/s	-	1

> Refer to the[ Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # B05 Dec.Place ### Definition Sets the number of decimal places displayed on the LCD and LED (up to 4 places). Values are truncated (rounded down). Default: 01 (1 decimal place). ### Notes This parameter **does not affect calculations**; it **only affects the display**. Cumulative flow is still accumulated using the original data. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` B05 Dec. Place Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select B.Unit , press Orange Button (Enter). • Use Gray Arrow Buttons to select B05 Dec. Place, press Orange Button (Enter). • Use the arrow Buttons to set the number of decimal places: • Left Gray Button: increase value / Right Gray Button: decrease value • Press Orange Button (Set) to save. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### B05 Options, RS485 Values, Read/Write Commands, and Formats | Option | Description | RS-485 Value | | ------------ | --------------------------- | ------------ | | 00 | Display integer only | 0 | | 01 (Default) | Display to 1 decimal place | 1 | | 02 | Display to 2 decimal places | 2 | | 03 | Display to 3 decimal places | 3 | | 04 | Display to 4 decimal places | 4 | > Refer to the[ Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # B06 Pipe Geo Unit ### Definition Sets the pipeline size unit. Executing this function automatically updates A03 (Pipe Geometry Unit). Default: mm (millimeter). ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` B06 Pipe Geo. Unit Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select B.Unit , press Orange Button (Enter). • Use Gray Arrow Buttons to select B06 Pipe Geo. Unit , press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to save. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### B06 Options, RS485 Values, Read/Write Commands, and Formats

Options	Description	RS-485 Value
mm (Custom)	-	0
inch	-	1

> Refer to the[ Read/Write Memory List ](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list)for the Modbus command format. This parameter uses the Int16 data format. # K Calibration | No. | Name | Description | | --- | --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | K02 | Calibra. Mode | Select the correction scheme, currently only the simple mode. | | K03 | Scale Factor | Fine-tune flow proportionally, default 1.0. This parameter is synchronized with Z05. | | K04 | Manual Offset |

Subtract the fixed instantaneous flow rate from the input value, and the unit is the same as the system setting value. For example, inputting 1.0 means that when the original instantaneous flow is 3.0, the instantaneous flow will be output at 2.0.

The default value is 0.0. This parameter works independently of Zero Offset.

| | K05 | Totalizer Scale | Adjusts the totalizer accumulation rate without changing instantaneous flow values. K05 scales the amount added to the totalizer each cycle, allowing the totalized value to be increased or decreased. Default: 1.0. | # K02 Calibra. Mode ### Definition Sets the correction method for instantaneous flow. Default: Simple Mode, using the formula: Corrected Instantaneous Flow = K03 × Measured Instantaneous Flow − K04 Parameters K02 (Correction Mode), K03 (Scale Factor), and K04 (Offset Flow) adjust flowmeter reading deviations. $$ \text{Corrected Instantaneous Flow} = K\_{03} \times \text{Measured Instantaneous Flow} - K\_{04} $$

Calibration Examples (Click to Expand)

**1. Error Caused by Liquid Density** **Example – 50% Sulfuric Acid**\ Assume the liquid is sulfuric acid with a specific gravity of 1.4.\ Actual measured weight: 26 tons. The flow meter displays 20,004 L.\ Converted weight: 20,004 × 1.4 = 28,005.6 kg (≈ 28 tons) \ → the reading is higher than the actual value. **Step 1: Adjust the K03 scale factor** $$K\_{03} = \frac{\text{Actual Weight}}{\text{Flow Meter Displayed Weight}}$$ = $$\frac{26\ \text{tons}}{28\ \text{tons}} \approx 0.928$$ Set **K03 = 0.928**, then the flow meter–calculated weight ≈ **25.98 tons**, close to the true value. **Step 2 – Fine adjustment using K04:** * After adjusting K03, readings may be accurate at **high flow**, but small deviations can remain at **low flow** or when the pump starts. * Adjust **K04** to compensate for fixed offset errors. For example： * If readings consistently **exceed** the true value by **0.1 ton**, set **K04 = 0.1**, and the system will automatically subtract this from the calculated weight. * If readings consistently **fall short of** the true value by **0.1 ton**, set **K04 = - 0.1**, and the system will automatically add this value to the calculated weight. **2. Error Caused by Analog Output** **Example**\ The user is using the analog output and finds that the receiving device (e.g., PLC) does not match the value shown on the flow meter. The meter display shows **0** (no flow in the pipe), but the output current is **4.1 mA** instead of the standard **4.0 mA**.\ After conversion at the receiving end, this results in an incorrect flow reading of **0.98 L/min** (zero offset). **Step 1: Use Simulation Mode to Check for Scaling Error** If the displayed flow value appears incorrect (for example, a flow reading when no liquid is present), first use Simulation Mode to verify whether a scaling error exists.\ Refer to the Simulation Mode section for detailed operation. Enable **F02 Simulation Mode**, then go to **E06** and enable the analog output content (recommended: **Flow Rate**).\ Next, enter **F01** to set the simulated flow value and observe the reading on the receiving device. For example, when the simulated value is set to **60 L/min** but the receiving end shows **58.41 L/min**, this indicates an overall scaling error (reading too low). *After testing with Simulation Mode, it can be confirmed that the issue is not only a zero offset, but also an output scaling error.* **Adjust the K03 scale factor** $$K\_{03} = \frac{\text{Actual Weight}}{\text{Flow Meter Displayed Weight}}$$ = $$\frac{26\ \text{tons}}{28\ \text{tons}} \approx 0.928$$ Set the K03 value to 1.027. After this adjustment, the flowmeter’s converted reading shows a weight of approximately 58.42, approaching the true value of 60. **Step 2: Eliminate the Remaining Fixed Offset (Zero Point Shift)** After adjusting K03, the readings are accurate at high flow rates, but small deviations may still occur at low flow rates or when the pump starts at a fixed flow. To correct this **fixed offset error**, you can fine-tune the K04 value. **Adjusting K04 to Correct Flow Values** For example, after the user exits simulation mode and the flow returns to zero, if the receiving end still shows a reading of 0.98, set K04 to +0.98. The system will automatically subtract this value from the calculation, effectively zeroing the meter’s reading.

### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Calibration Offset Function (Click to Expand)

> Used to correct flowmeter reading deviations. > > **Related Parameters: K02:** Calibration Scheme, **K03:** Scale Factor, **K04:** Offset Flow {% stepper %} {% step %} ### K02 Calibration Scheme Selection Currently only **Simple Mode** is available. No adjustment is required.

{% endstep %} {% step %} ### K03 Scale Factor Setting ``` K03 Scale Factor Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select K. Calibration, press Orange Button(Enter). • Use Gray Arrow Buttons to select K03 Scale Factor, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to decrease, Right Gray Button to increase. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

{% endstep %} {% step %} ### **K04 Flow Offset Setting** ``` K04 Manual Offset Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select K. Calibration, press Orange Button(Enter). • Use Gray Arrow Buttons to select K04 Manual Offset, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to decrease, Right Gray Button to increase. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

{% endstep %} {% step %} ### Calibrate Verification Verify whether the calibration result meets expectations by checking if the calibrated flow value matches the target value. If not, readjust K03 (Scale Factor) or K04 (Flow Offset) and repeat steps 2–4. The system automatically calculates the calibrated instantaneous flow using the formula:\ \ $$CorrectedInstantaneousFlow=K03(ScaleFactor)×MeasuredInstantaneousFlow−K04(OffsetFlow$$ {% endstep %} {% endstepper %}

### K02 Options, RS485 Values, Read/Write Commands, and Formats

Options	Description	RS-485 Value
Simple mode (Custom)	Currently only Simple Mode is available.	0

> Refer to the [Read/Write Memory List ](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list)for the Modbus command format. This parameter uses the Int16 data format. # K03 Scale Factor ### Definition Sets the correction method for instantaneous flow. Default: Simple Mode, using the formula: Corrected Instantaneous Flow = K03 × Measured Instantaneous Flow − K04 Parameters K02 (Correction Mode), K03 (Scale Factor), and K04 (Offset Flow) adjust flowmeter reading deviations. $$ \text{Corrected Instantaneous Flow} = K\_{03} \times \text{Measured Instantaneous Flow} - K\_{04} $$

Calibration Examples (Click to Expand)

### Notes * **K03** cannot accept negative values. * To measure reverse flow, enable **A17 (Reverse Flow)**. * **K03** serves the same function as **Z05**; users may choose either. Executing this function will automatically update the **Z05 Scale Factor** setting. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Calibration Offset Function (Click to Expand)

### K02 Options, RS485 Values, Read/Write Commands, and Formats

Parameter Input Range	Corresponding Values	RS-485 Value
Custom	1	-
Minimum	0.001	-
Maximum	1000	-

> Refer to the [Read/Write Memory List ](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list)for the Modbus command format. This parameter uses the float32 data format. # K04 Manual Offset ### Definition Corrects fixed errors that do not vary with flow (zero offset). K04 is added to or subtracted from the instantaneous flow. Default: 0.0. Parameters K02 (Correction Mode), K03 (Scale Factor), and K04 (Offset Flow) allow adjustment of flowmeter reading deviations. $$ \text{Corrected Instantaneous Flow} = K\_{03} \times \text{Measured Instantaneous Flow} - K\_{04} $$

Calibration Examples (Click to Expand)

### Notes 1. Setting **K04** to a negative value turns the subtraction in the formula into addition, adding a fixed value to the instantaneous flow reading. 2. The unit of this parameter follows the system’s configured units; to change units, adjust the **B parameters**. 3. This parameter functions similarly to **Zero Offset** but operates independently. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Calibration Offset Function (Click to Expand)

### K04 Options, RS485 Values, Read/Write Commands, and Formats | Parameter Input Range | Corresponding Values | RS-485 Value | | --------------------- | -------------------- | ------------ | | Custom | 0 | - | | Minimum | -100000 | - | | Maximum | +100000 | - | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # K05 Totalizer Scale ### Definition Adjusts the totalizer accumulation rate without changing instantaneous flow values. K05 scales the amount added to the totalizer each cycle, allowing the totalized value to be increased or decreased. Default: 1.0. Operates according to the formula: $$ \text{New Totalizer Value} = \text{Previous Totalizer Value} + K\_{05} \times \text{Volume Added This Interval} $$ ``` Example: Customer requirement: Display cumulative total as weight while keeping instantaneous flow in L/min. Liquid density: 1.20 kg/L. Settings: (K05 = 1.20) Calculation: * Previous totalizer: 250.00 L * Current instantaneous flow: 150 L/min → Volume in 1 second = 2.5 L Formula: New Totalizer＝Previous Totalizer + (K05 Current Volume) Result: New Totalizer = 250.00 + (1.20 x 2.5) = 250.00 + 3.00 = 253.00 (kg) ``` ### Notes 1. This setting does not affect previously accumulated data. 2. Adjusting (K05) scales both forward and reverse flow proportionally. 3. K05 must be a positive value. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` K05 Totalizer Scale Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select K. Calibration , press Orange Button(Enter). • Use Gray Arrow Buttons to select K05 Totalizer Scale, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to decrease, Right Gray Button to increase. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

### K05 Options, RS485 Values, Read/Write Commands, and Formats | Parameter Input Range | Corresponding Values | RS-485 Value | | --------------------- | -------------------- | ------------ | | Custom | 1 | - | | Minimum | 0.001 | - | | Maximum | 1000 | - | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the float 32 data format. # C Total | No. | Name | Description | | --- | ------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | C01 | Total Method | Set cumulative calculation direction. There are 3 options available: forward flow, reverse flow, and net flow volume. Switching method will set the cumulative volume to zero. Default method is forward flow. | | C02 |

Del.

Total(Delete Total)

| Set cumulative flow volume to 0. First select "Yes" then save. | | C03 | Dosing Mode | Manually adjusts the dosing mode to either **Count Up** (incremental) or **Count Down** (decremental). Default setting: Off. | | C04 | Dosing Target | Sets the target value for dosing operations. Default value: 1000. | | C05 | Dosing Reset Time | Resets the dosing timer. Minimum value: 1 second. Default value: 300 seconds. | # C01 Total Method ### Definition Sets the totalizer counting method. Changing this method will reset all accumulated data. Default is forward flow. ### Notes Changing the counting mode will reset the totalizer to zero and start a new accumulation. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` C01 Total Method Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select C. Total, press Orange Button (Enter). • Use Gray Arrow Buttons to select C01 Total Method, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

On Main Screen 5: Total \\ The LCD displays the totalizer value in large digits. The bottom of the screen shows POS, NET, and NEG, representing Forward (POS), Net (NET), and Reverse (NEG), respectively.

### C01 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ------- | ----------------- | ------------ | | POS | Forward (Default) | 0 | | NEG | Reverse | 1 | | NET | Net | 2 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # C02 Del.Total ### Definition Set the flow meter’s totalizer to zero manually. Default: No. ### Notes N/A ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` C02 Del. Total Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select C. Total , press Orange Button (Enter). • Use Gray Arrow Buttons to select C02 Del. Total, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### C02 Options – RS485 Values, Read/Write Commands, and Format | Option | Description | RS-485 Value | | ------------ | --------------- | ------------ | | No (Default) | No Reset | 0 | | Yes | Reset Totalizer | 1 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. \ > The data type for this parameter is **Int16**. #### RS485 Remote Totalizer Reset (C02 Del. Total) | Item | Description | | ---------------- | ---------------------------- | | Parameter Name | C02 Del. Total | | Description | Resets the Totalizer to zero | | Register Address | 02 01 | | Register Length | 1 | | Data Type | int16 | | Read Command | Function Code 03 | | Write Command | Function Code 06 | #### 1.Read Current Status (Function Code 03) The master can use Function Code 03 to read the current status of C02: * Return value = `0`: Not triggered (default) * Return value = `1`: Reset action triggered #### 2.Execute Totalizer Reset (Function Code 06) The master can use Function Code 06 to write a specified value to the C02 register to trigger the reset: * Write Value: `1` (Int16) * After writing, the device immediately resets the Totalizer to zero. # C03 Dosing Mode ### Definition Set the totalizer counting direction—whether it counts upward or downward from the set value. Default: disabled.

Dosing Function (Click to Expand)

#### 1. Flow Meter Dosing Function Description The dosing function controls a valve based on the flow meter’s totalizer. When the accumulated volume reaches the preset target, the valve closes automatically. After the set buffer time, the totalizer resets to zero, preparing for the next dosing cycle. This function enables dosing control directly through the flow meter without an external PLC, making it suitable for chemical dosing, liquid replenishment, and batching applications. #### **2. Parameter Configuration Table** | Parameter Code | Function | Description | Recommended Setting | | -------------- | ----------------- | ------------------------------------------------------------- | ----------------------------------------------- | | E02 | OCT Definition | Sets the control output mode | Must be set to **Dosing mode** | | C03 | Dosing Mode | Enables the dosing function | Set to **On** | | C04 | Dosing Target | Sets the target volume per dosing cycle | Enter as required (unit: L) | | C05 | Dosing Reset Time | Sets the buffer time after the target is reached before reset | Set based on system response time (unit: s) | | H09 | Startup Screen | Sets the main display screen | Set to **Dosing mode screen** | | D16 | Dosing Alarm | Alarm indication when dosing is completed | Enable as required or set to **Do Not Disturb** | #### 3. Dosing Operation After the valve opens, fluid flow begins and the flow meter accumulates volume in real time. When the accumulated volume reaches the dosing target set in **C04**, the system closes the valve according to the **OCT output logic defined in E02**, completing the dosing cycle. A “Dosing Complete” alarm is then triggered based on the **D16** setting. The system then enters the reset delay defined in **C05**. Once the delay time elapses, the totalizer is automatically reset to zero and the system is ready for the next dosing cycle.

{% hint style="info" %} Due to response time delays in valve actuation and control signals, the actual dosing result may differ slightly from the set value. This deviation becomes more noticeable with smaller dosing volumes, higher flow rates, or longer distances between the valve, flow meter, and container. For higher dosing accuracy, select an appropriate pipe size and piping layout. It is recommended to perform on-site testing and adjust the calibration (scaling) factor as needed before actual operation. {% endhint %}

### Notes 1. After enabling **C03**, also configure **C04**, **C05**, **E02**, and **H09** accordingly. 2. If the control valve’s drive current is compatible, the flow meter’s built-in dosing function can be used directly with the valve to achieve the required dosing operation, without additional PLC programming. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` C03 Dosing Mode Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select C. Total , press Orange Button (Enter). • Use Gray Arrow Buttons to select C03 Dosing Mode, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

**Dosing Operation Mode Screen**

### C03 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ------------- | ----------- | ------------ | | OFF (Default) | - | 0 | | Count Up | - | 1 | | Count Down | - | 2 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # C04 Dosing Target ### Definition Sets the totalizer to automatically reset when it reaches a specified value (unit: L). Range: 0.1–999,999,999. Default: 1000.

Dosing Function (Click to Expand)

### Notes 1. **C04 accepts positive values only.** 2. To use the **C04** function, also configure **C03**, **C05**, **E02**, and **H09** accordingly. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` C04 Dosing Target Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select C. Total, press Orange Button(Enter). • Use Gray Arrow Buttons to select C04 Dosing Target, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

**Dosing Operation Mode Screen**

### C04 Options, RS485 Values, Read/Write Commands, and Formats | Parameter Input Range | Corresponding Values | RS-485 Value | | --------------------- | -------------------- | ------------ | | Default | 1000 | - | | Minimum | 0.1 | - | | Maximum | 999,999,999 | - | > Refer to the[ Read/Write Memory List ](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list)for the Modbus command format. This parameter uses the float 32 data format. # C05 Dosing Reset Time ### Definition Set the totalizer to reset automatically at a specified interval. Range: 1–3600 seconds. Default: 300.

Dosing Function (Click to Expand)

### Notes To use the **C05** function, also configure **C03**, **C04**, **E02**, and **H09** accordingly. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` C05 Dosing Reset Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select C. Total, press Orange Button(Enter). • Use Gray Arrow Buttons to select C05 Dosing Reset press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

#### Main Screen 4 – Dosing The dosing status can be monitored on the main screen. The first line of the LCD shows the **C05 Reset Time**, which counts down from the user-set **C05** value. When it reaches zero, the totalizer automatically restarts the accumulation.

### C05 Options, RS485 Values, Read/Write Commands, and Formats | Parameter Input Range | Corresponding Values | RS-485 Value | | --------------------- | -------------------- | ------------ | | Default | 300 | - | | Minimum | 1 | - | | Maximum | 3600 | - | > Refer to the[ Read/Write Memory List ](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list)for the Modbus command format. This parameter uses the Int16 data format. # D Alarm & Info | No. | Name | Description | | --- | -------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | D01 | Sensor Error Alarm. |

Alarm-A0

Alarm when the ultrasonic module is abnormal. Do not disturb mode is preset.

| | D02 | Pipe Sensor Alarm |

Alarm-A1

Alarm when the module detecting pipe diameter is abnormal. Do not disturb mode is preset.

| | D03 | Bad UltraS. Signal |

Alarm-C3

Alarm when the ultrasonic signal is poor. Do not disturb mode is preset.

| | D04 | Off Pipe Alarm. |

Alarm-A4

Alarm when the flowmeter is not installed correctly on the pipeline.

Preset Do Not Disturb Mode: The red light will not flash, but the flow will return to zero when the alarm occurs, and the alarm a04 will become 1. on - When the alarm occurs, the red light will flash, the flow will return to zero, and the alarm a04 will become 1.

| | D05 |

FlowLIM Ala

(Flow Volume Limit Alarm)

Alarm-B

Set the alarm when the instantaneous flow rate exceeds the range, which can be turned off. The default is off.

| | D06 | Up LIM (Upper Limit) | Defines the upper normal range of flow for D04. | | D07 | Low LIM (Lower Limit) | Defines the flow normal range lower limit for D04. | | D08 |

Hysteresis%

(Hysteresis Percentage)

Set the hysteresis percentage for the release of the flow upper and lower limit alarms

Percentages are defined as percentages of the upper and lower bounds.

The range is 0-33%, and the default value is 3%.

This parameter must be a positive value.

| | D09 | Total Ala. (Total Alarm) |

Alarm-B

The alarm can be set to be turned off when the accumulated flow range is exceeded. The default is off.

| | D10 | Total Trig. (Total Alarm Trigger Condition) |

Set the notification condition of the cumulative target value (D08), greater than the target or less than the target.

The preset is larger than the target.

Alarm B

Set whether to alarm when it exceeds the range of 4-20mA, and it can be closed. The default is off.

| | D13 | Speed Alarm |

Alarm B

Set whether to alarm when the absolute value of the flow velocity exceeds the range of 6m/s, which can be turned off. On by default.

| | D14 | PulseOverlap |

Alarm B

Pulse output (Pulse output) signal overlap alarm. The setting of parameter E03 is too large, resulting in overlapping of Pulse Output output signals. Can be turned off, default is on.

| | D15 | IoutStatAla (Iout Status Alarm) | Set the Iout state warning mode, selectable on, off and do not disturb mode (Do not disturb), default do not disturb mode. The Do Not Disturb mode means that when an abnormality occurs, the color and LED displayed on the screen will not change, but it can still display numbers in the communication part and display abnormalities on the status page. | | D16 | Install Issue | Alarm - C2 The signal quality is not ideal due to poor installation of the flowmeter. It is recommended to lock the flowmeter evenly to achieve the best signal quality. Default non-disturbance mode: no light, Alarm C2 displays 1. | # D01 BoardComm Alarm ### Definition Set the flow meter’s alarm mode for carrier communication module malfunctions. Default: Do Not Disturb. The alarm code belongs to Alarm – A. ### Notes In **Do Not Disturb (DND) mode**, the screen color does not change during an abnormal condition, but values and status bits on the communication and status pages still indicate the issue. {% hint style="info" %} ### DND Mode When **Do Not Disturb (DND) mode** is enabled: * The flow meter detects abnormal conditions but the red backlight will not turn on.\ *Example:* Alarm-A “4 Off Pipe” will not trigger the backlight in DND mode. * Abnormal conditions are still displayed on the **Status/Alarm page**. * If connected via RS485, the monitoring system still receives the alarm signal. * OCT alarm outputs continue to operate if configured. {% endhint %}

### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` D01 Board Communication Alarm Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select D. Alarm & Info, press Orange Button (Enter). • Use Gray Arrow Buttons to select D01 Board Communication Alarm, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### D01 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ------------------------------------- | ----------- | ------------ | | On | - | 1 | |

Do Not Disturb

(Default)

| - | 2 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # D02 Pipe Sensor ### Definition Set the flow meter’s alarm mode when module detect pipe diameter is abnormal. Default: Do Not Disturb. The alarm code belongs to Alarm – A. ### Notes In **Do Not Disturb (DND) mode**, the screen color does not change during an abnormal condition, but values and status bits on the communication and status pages still indicate the issue. {% hint style="info" %} ### DND Mode When **Do Not Disturb (DND) mode** is enabled: * The flow meter detects abnormal conditions but the red backlight will not turn on.\ *Example:* Alarm-A “4 Off Pipe” will not trigger the backlight in DND mode. * Abnormal conditions are still displayed on the **Status/Alarm page**. * If connected via RS485, the monitoring system still receives the alarm signal. * OCT alarm outputs continue to operate if configured. {% endhint %}

### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` D02 Pipe Sensor Alarm Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select D. Alarm & Info, press Orange Button (Enter). • Use Gray Arrow Buttons to select D02 Pipe Sensor, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### D02 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ------------------------------------- | ----------- | ------------ | | On | - | 1 | |

Do Not Disturb

(Default)

| - | 2 | > Refer to the[ Read/Write Memory](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram) List for the Modbus command format. This parameter uses the Int16 data format. # D03 Bad UltraS Signal ### Definition Set the flow meter’s alarm mode for poor ultrasonic signal conditions. Default: Do Not Disturb. The alarm code belongs to Alarm – C. ### Notes {% hint style="info" %} ### DND Mode When **Do Not Disturb (DND) mode** is enabled: * The flow meter detects abnormal conditions but the red backlight will not turn on.\ *Example:* Alarm-A “4 Off Pipe” will not trigger the backlight in DND mode. * Abnormal conditions are still displayed on the **Status/Alarm page**. * If connected via RS485, the monitoring system still receives the alarm signal. * OCT alarm outputs continue to operate if configured. {% endhint %}

### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

``` D03 Bad Ultrasonic Signal Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select D.Alarm & Info , press Orange Button (Enter). • Use Gray Arrow Buttons to select D03 Bad Ultrasonic Signal, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

### D03 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | ------------------------ | ----------- | ------------ | | On | - | 1 | | Do Not Disturb (Default) | - | 2 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # D04 Off Pipe Alarm ### Definition Set the alarm mode when the flow meter is not installed correctly on the pipeline; the default is Do Not Disturb mode. The alarm code is Alarm - A. ### Notes {% hint style="info" %} ### DND Mode When **Do Not Disturb (DND) mode** is enabled: * The flow meter detects abnormal conditions but the red backlight will not turn on.\ *Example:* Alarm-A “4 Off Pipe” will not trigger the backlight in DND mode. * Abnormal conditions are still displayed on the **Status/Alarm page**. * If connected via RS485, the monitoring system still receives the alarm signal. * OCT alarm outputs continue to operate if configured. {% endhint %}

### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Flow Range Limit Alarm Example (Click to Expand)

``` D06 Upper Limit: 30 LPM D07 Lower Limit: 10 LPM D08 Hysteresis: 3% (default) Calculations: Range: 30 − 10 = 20 LPM Hysteresis: 20 × 3% = 0.6 LPM Alarm Behavior: When flow exceeds the upper limit (30 LPM), the alarm is triggered. The alarm will clear only when the flow drops below 29.4 LPM (30 − 0.6). When flow falls below the lower limit (10 LPM), the alarm is triggered. The alarm will clear only when the flow rises above 10.6 LPM (10 + 0.6). ```

### Notes {% hint style="info" %} ### DND Mode When **Do Not Disturb (DND) mode** is enabled: * The flow meter detects abnormal conditions but the red backlight will not turn on.\ *Example:* Alarm-A “4 Off Pipe” will not trigger the backlight in DND mode. * Abnormal conditions are still displayed on the **Status/Alarm page**. * If connected via RS485, the monitoring system still receives the alarm signal. * OCT alarm outputs continue to operate if configured. {% endhint %} ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Flow Range Over-Limit Alarm Operation (Click to Expand)

> When the flow range alarm is enabled and the flow reaches the alarm condition, **Alarm B** is triggered. Alarm bits (**Bit0, Bit1**) display **1** to indicate the alarm has been activated. > > The system responds according to the alarm mode set in **D05**: > > * **On**: The receiving device receives the alarm signal, and the flow meter screen displays a red backlight warning. > * **Do Not Disturb (DND)**: The receiving device still receives the alarm signal, but the screen does not display the red backlight. {% stepper %} {% step %} ### **Set D05 to enable the flow range over-limit alarm** ``` D05 FlowLIM Alarm Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select D. Alarm & Info, press Orange Button (Enter). • Use Gray Arrow Buttons to select D05 FlowLIM Alarm, press Orange Button (Enter). • Use Gray Arrow Buttons to choose the options. • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

{% endstep %} {% step %} ### Set D06 to define the flow upper limit ``` D06 Up LIM Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select D. Alarm & Info, press Orange Button(Enter). • Use Gray Arrow Buttons to select D06 Up LIM, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

{% endstep %} {% step %} ### Set D07 to define the flow lower limit ``` D07 Low LIM Setting Steps • From the main screen(green backlight), press Orange Button(Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select D. Alarm & Info, press Orange Button(Enter). • Use Gray Arrow Buttons to select D07 Low LIM, press Orange Button(Enter). • Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray). • Press Orange Button(Edit) to enter adjustment mode. • Adjust digits: Left Gray Button to increase, Right Gray Button to decrease. • Press Orange Button(Set) to confirm each digit; repeat for other digits as needed. • After all digits are set, press Blue Button(Save). • Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel). • Press Blue Button(ESC) to return to the main screen(green backlight). ```

{% endstep %} {% step %} ### Set D08 to define the flow hysteresis ``` D08 Hysteresis Setting Steps • From the main screen (green backlight), press Orange Button (Setup) to enter settings (orange backlight). • Use Gray Arrow Buttons to select D. Alarm & Info , press Orange Button (Enter). • Use Gray Arrow Buttons to select D08 Hysteresis, press Orange Button (Enter). • Use the Gray Arrow Buttons to adjust the flow hysteresis percentage: • Press the Left Gray Buttons to increase the value • Press the Right Gray Buttons to decrease the value • Press Orange Button (Set) to confirm. • Press Blue Button (ESC) to return to the main screen (green backlight). ```

{% endstep %} {% step %} ### Flow Range Over-Limit Alarm Operation When the flow range alarm is enabled and the flow reaches the alarm condition, **Alarm B** is triggered. Alarm bits (**Bit0, Bit1**) display **1** to indicate the alarm has been activated. The system responds according to the alarm mode set in **D05**: * **On**: The receiving device receives the alarm signal, and the flow meter screen displays a red backlight warning. * **Do Not Disturb (DND)**: The receiving device still receives the alarm signal, but the screen does not display the red backlight.

{% endstep %} {% endstepper %}

### D05 Options, RS485 Values, Read/Write Commands, and Formats | Options | Description | RS-485 Value | | -------------- | ----------- | ------------ | | Off (Default) | - | 0 | | On | - | 1 | | Do Not Disturb | - | 2 | > Refer to the [Read/Write Memory List](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list) for the Modbus command format. This parameter uses the Int16 data format. # D06 Up LIM ### Definition Set the upper limit of the normal flow range. Default: 100.\ (D05 , D06 , D07 , and D08 work together to enable the flow range over-limit alarm function.)

Flow Range Limit Alarm Example (Click to Expand)

### Notes If either **D06** or **D07** is adjusted, the other must also be set; otherwise, the display may not function correctly. If both are unset, default values are **D06 = 100**, **D07 = 0**. ### Operation Procedure

Button Functions (Click to Expand)

When the main screen is displayed in **green backlight**, the four buttons function as follows: *

**Blue Button (leftmost):** Return, exit, or save settings. * Gray Direction Buttons: *

**Left Gray:** Previous Page, decrease value, or select item *

**Right Gray:** Next Page, increase value, or select item *

Flow Range Over-Limit Alarm Operation (Click to Expand)

{% endstep %} {% endstepper %}

### D06 Options, RS485 Values, Read/Write Commands, and Formats | Parameter Input Range | Corresponding Values | RS-485 Value | | --------------------- | -------------------- | ------------ | | Default | 100 | - | | Minimum | -99999 | - | | Maximum | 100000 | - | > Refer to the [Read/Write Memory List ](/qr/fu-es-echosense-instruction-manual/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-read-list)for the Modbus command format. This parameter uses the float 32 data format. --- [Next Page](https://docs.lorric.com/qr/llms-full.txt/1)