This instruction manual version is v1.0

This document is applicable to the products below.

Method for confirming product version

You can find the hardware version on the sticker on the left side of the device.

Firmware version could be found on the bottom right of the boot screen indicated by a red arrow sign like shown below.

Definition of hardware version number

Hardware version number starts with a lowercase “V”, followed by 1 to 2 numbers “YY” which represents important modification of electronic parts and mechanisms that affects product’s core function. Following 1 or 2 numbers “XX” represents modification of non-core functions. The last 1 or 2 numbers “ZZ” represents modification which does not affect product function, such as minor mechanism feature modification or substitution of electronic components.

Definition of firmware version number

Firmware version number starts by lowercase “V”, followed by 1 to 2 numbers “YY” which represents important modifications of the firmware. Following 1 or 2 numbers “XX” represents modification of non-core functions. The last 1 or 2 numbers “ZZ” represents modification which does not affect product function.

Definition of manual version

Version number starts from lowercase “v”, following 2 numbers “XX” which is the version of manual.The last 1 or 2 numbers “ZZ” represents revised serial number of the version.

Due to modifications in mechanisms, electrical or firmware that could affect usage or installation methods, LORRIC will release new versions of the instruction manual. For example, if the definition of aviation plug changes then we release an updated manual. At the same time, for clients who own older models, the appropriate manual will still be available.

If modifications in the instruction manual don't affect the usage, but are just for improvements in grammar, sentence structure, etc. LORRIC will not release a new version.

We provide multi-language manuals

The manual provides multi-language versions. The same manual version in each language is for the same hardware and firmware version.

Measurement Principle

A number of global invention patent applications are pending.

The LORRIC clamp-on ultrasonic flowmeter uses the ultrasonic time difference to measure the flow, and uses the linear relationship between the ultrasonic transmission time difference between the upstream and downstream of the pipe and the flow rate to measure the flow. Due to the one-piece clamp-on structure, it can be installed without interventions in the pipe, compared with the in-line flowmeter, it can also provide the highest chemical resistance and leak-proof performance. Compared with the traditional ultrasonic flowmeter, since there is no need to adjust the position of the upstream and downstream probes, it can be installed quickly, and also greatly reduces the training required for installers.

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.

Usage Scenario

This product provides flow measurement of liquids that do not contain a large amount of impurities in full pipe in industrial environments. The installation location should allow the fluid in the pipe to be as stable and fully developed as possible. The temperature of the pipe can be up to 100 degrees Celsius, but the ambient temperature should allow the device to work between -10 and 60 degrees Celsius. The device also provides IP66 water repellent design and cannot be used under water. The product material is PC, PMMA, PPS, PA66, stainless steel 304 and PEEK, which can resist light chemicals, but should not be exposed to chemicals for a long time or in large quantities.

In order to reduce the difficulty of installation, each model corresponds to a range of pipe outer diameters. Please select the model according to the pipe specifications to be installed. Some combinations of pipe materials and wall thicknesses that are unfavorable for ultrasonic transmission may make it difficult to measure the flow rate (for example, too thick PVDF pipes or some metal pipes). Please consult the sales staff before purchasing.

Firmware Version: P1203 Release Date: August 2024

Improvements:

• 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."

Firmware Version: 1.202

Improvement:

• Added Modbus RTU commands 03, 06, and 30 to enable remote parameter configuration.

Exterior

Exploded views

Product Specs

Mechanism Specs

Size and Model

Measurement Specs

User Interface

** IP66：The IP Code, International Protection Marking, IEC standard 60529, sometimes interpreted as Ingress Protection Marking, classifies and rates the degree of protection provided by mechanical casings and electrical enclosures against intrusion, dust, accidental contact, and water. The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign objects. The second digit indicates the level of protection that the enclosure provides against harmful ingress of water. First 6 stands for dust tight: No ingress of dust; complete protection against contact (dust tight). A vacuum must be applied. Test duration of up to 8 hours based on air flow.

*** This machine is calibrated with normal temperature water and CNS UPVC pipe before delivery. Different environments and different fluids will result in different performance.

Device Functionalities

LED screen mainly provides high contrast numbers display for high visibility even in a dark environment.

LED screen also provides 5 displayed digits within a decimal point which mainly displays real-time and accumulated flow volume data. For more digits of data, such as historical data and long-term cumulative data, please look at the LCD screen.

LCD screen allows display for 16 English characters in 3 rows . The first row is current content with units. The second row is data. The third row is a definition of each button.

The LCD screen has a 3-color backlit display. Definition of each color light as below:

• Green: Real-time data, device is working normally.

• Orange: The device is normal, and the display screen is on the setting page.

There are 4 buttons on the device, the definition of each button will be displayed at the upper row on the LCD screen. Generally, the leftmost button stands for “Exit” or “Back to last page”. The middle 2 buttons are for users to review page by page, modify data, or switch options. The rightmost button stands for “Set” or “Confirm”. Previously mentioned definitions are only for general use. For some other usage scenarios, button definitions are modifiable for usability or error proof.

Package contains

Besides other agreed contents, our standard package contains:

• FU-ES Device * 1

• 2m 8 pin cable * 1

• Quick starting manual * 1

• A buckles for the corresponding pipe diameter

Size, material, model

Mechanical and electrical spec of device

Power supply

OCT output

Analog output (4-20mA, 0-20mA)

Digital communication Modbus RTU RS485

Update Date: 2024/09/02

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.

Definition of M12 8-Pin connector

1. Connect the cable inside the box to the power supply and communication system. The unused color cables should be covered or protected to avoid electric leakage or short circuit.

2. Before removing the top housing of the device and wiring, the device should be powered off and the M12 8-pin cable should be removed.

3. Due to space constraints, the sticker on the side of the device and subsequent illustrations only use cable contact definitions.

4. Please see below images to know where each cable is connected.

Wiring diagram of DC power supply

Wiring diagram of 4-20mA analog output

This function will only work with power supplies through the brown and blue lines. The following diagram is not showing power supply wiring for readability.

OCT NPN Output Wiring Diagram

This function can only work when the brown and blue lines of the DC power supply are powered. Please note that the DC power supply diagram is omitted in this figure. For more details, see the DC power supply wiring diagram.

OCT PNP Output Wiring Diagram

This function can only work when the brown and blue lines of the DC power supply are powered. Please note that the DC power supply diagram is omitted in this figure. For more details, see the DC power supply wiring diagram.

RS485 Two-Wire Wiring Diagram

This function can only work when the brown and blue lines of the DC power supply are powered. Please note that the DC power supply diagram is omitted in this figure. For more details, see the DC power supply wiring diagram

Device Contact Definitions

1. Due to space constraints, the sticker on the side of the device only uses cable contact definitions.

2. The number of the device contact and the cable contact is mirrored and symmetrical.

3. Please see below device contact number:

Important notice before installing

• ​​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.

Extremely important precautions to take note before installing!!

If any of the scenarios below occur and cause damage to the flowmeter, the warranty is void.

• 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.

How to Choose an Installation Location

The 1st principle for choosing an installation location is wherein the pipe is filled completely with liquid to avoid issues caused by air bubbles or precipitation in the pipe. The 2nd principle is allowing the flow in the pipe to be fully developed by having enough length on both sides of the straight pipe. This means no equipment should be left on either side like adaptors, elbow pipe, valves or pumps.

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.

Vertical pipe

Please choose the vertical pipe with a bottom-up flow direction.

Horizontal pipe

• Please choose the location with full liquid, like the lower part of the inclined pipe.

• LORRIC’s EchoSense flow meter should not be installed at the top right or bottom side of the pipe in order to avoid the interruption of air bubbles or precipitation.

Please be cautious of the air bubble in the pipe to avoid measurement error.

If the installation location for the flowmeter is close to a tank where pressure is low. We recommend installing a valve at the pipe exit to avoid generating any air bubbles.

New Product Installation Process

1. Make sure that the buckle is in the released position.

2. After the device faces the intended operation direction, pre-lock the device and the buckle on both sides of the pipeline with screws. At this time, if it is a large pipe in the applicable pipeline, the device may not move. If it is a small pipe in the applicable pipeline and the device is still in a movable state, please lock the flowmeter.

3. Tighten the two knobs on the fastener by hand, as long as the device does not rotate and move.

4. Finished

How to rotate the display screen direction

1. Please turn off the device and unplug it before disassembling.

2. Take off the four hex socket head cap screws on the top housing according to the above image.

3. Separate the top and bottom housing.

   1. Be aware when separating the top and bottom housing because there are many wires connecting both.

4. Rotate top housing to a desired viewing orientation.

   1. Do not rotate the top housing too many times to prevent the cables from being damaged from unnecessary pulls.

5. On the bottom housing there is an O-ring with an inner groove for a thread hole . For it to work properly, please confirm there is no particle, fiber or any object that may break the sealing function before attaching the top and bottom housing.

6. Combine top with bottom housing.

7. Tighten four screws on top housing.

   1. Too much torque may damage the device.

8. Finish.

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.

Recommended flow of parameter setup

1. After the mechanism is installed, execute Z03 to automatically initialize the flowmeter parameters, and the machine can work normally.

Basic tuning

1. If there is still large flow data with the fluid stationary, execute a Z04 Zero Offset correction with water in the pipe and the fluid stationary.

2. If there is a reference value for the flow rate, you can use the Z05 Scale Factor to multiply the flow rate data by a certain ratio to correct it to the correct value.

Main Functions and Steps

1. System Startup: On the main screen, open the system menu and navigate to the "(Z Quick Menu)" interface.
2. Settings Page: In the "(Z Quick Menu)" options interface, locate and select the "(Z02 Automatic Pipe Size Detection)" menu, then press enter.
3. Initiate Detection: Click the “Start Detection” button. The system will automatically begin the pipe size detection process.

4. Viewing Results: Once detection is complete, the screen will display detailed results. You can then return to the main screen.

Example Explanation

• Example Installation: For a pipe size CNS W15 PVCU, the system will display normal detection results if installed correctly.

  • (Left Image): If a matching pipe size is found, the screen will display the pipe size name.

  • (Right Image): If no matching pipe size is found, the system will default to a CNS W size specification.

Common Reasons for Unsuccessful Z02 Detection

• The pipe size is not in the built-in options. Refer to the A02 list for different model pipe sizes. See the pipe size guide for further details.

• Improper installation: Excessive or insufficient torque can cause inaccurate detection results.

• Pipe deformation due to material, pressure, wall thickness, or temperature may lead to inconsistent detection results.

Important Notes

• Ensure the pipe is properly installed to prevent detection errors.

• Regularly calibrate the system to maintain detection accuracy.

LCD screen displays 3 rows of information.

Functions of each button

There are 4 buttons on the device, the definition of each button will be displayed at the upper row on the LCD screen. Generally, the leftmost button stands for “Exit” or “Back to last page”. The middle 2 buttons are for users to review page by page, modify data, or switch options. The rightmost button stands for “Set” or “Confirm”. Previously mentioned definitions are only for general use. For some other usage scenarios, button definitions are modifiable for usability or error proof.

Three-color large indicator lights

Definition of each LCD backlight color:

• Green: Real-time data, device is working normally.

• Orange: Non real-time data display. Set-up page display.

Frequency of data update

Due to frequent data updates for real time flow volume, data on the LED screen will update first, then data on the LCD screen. Therefore, they may have about 0.1 seconds updated time difference. between both data sets.If there are not many digits in the data, please use the LED screen for the main data.

Displayed digits on LED screen

Maximum 5 displayed digits are provided on the LED screen. If data digits exceed more than 5 digits, “FFFFF” will be displayed on the LED screen (please refer to the image below). At this time, for reading complete data, you can try to modify the units or see the 2nd row data on the LCD screen to confirm exact flow volume.

When the flow direction is reversed and the data is a negative number, the 1st digit will be a minus sign with four remaining digits.

Hybrid Page Application Monitoring

Application Scenario the Hybrid Page provides real-time monitoring of two key metrics—instantaneous flow rate and cumulative flow rate—allowing users to make prompt adjustments based on current conditions. This dual-data display is designed to optimize operational decision-making and efficiency.

Hybrid Page Setup Guide

Follow these steps to configure the Hybrid Page:

1. Open the Settings Menu:

   • Navigate to the Settings screen and select Option H.

   • Press the button to enter the settings submenu H09: Boot Screen Settings.

2. Select the Hybrid Page Option:

   • In the settings menu, locate and select the "Hybrid Page" option.
3. Set Parameters:

   • Adjust display parameters based on operational needs, such as the flow rate display format or alarm threshold indicators.

4. Save Settings and return:

   • Once adjustments are complete, click the "Save" button to apply and retain the settings.

HybHybrid Page Function Page Display

The monitoring screen is composed of 2 sections. The first 7 pages are real-time data monitoring. The last 15 pages are the current date, time and historical cumulative volume for the past 14 days. All the pages can be viewed cyclically by pressing the middle 2 direction buttons. Each definition on these 22 pages could be found below.

Monitoring screen detail

Monitoring Page No.1~No.3

Monitoring Page No.4~No.6

State 1 screen description

Description of Alarm A

Description of Alarm B

Description of Alarm C

Description of system status

Description of State 2

If the password function is turned on, press Setup from the monitoring screen to modify the parameters, the following screen will appear first:

Press the bottom-right button for entering the set-up page as below.

Enter the sub menu, then select the expected parameter. Accordingly, find below image for display reference.

If there is a N/A on the lower right corner of an option, it means that this version of the hardware does not have this function, and you cannot enter the option.

Instantaneous flow volume and deviation

The maximum possible deviation for LORRIC’s flow meter is 0.5 % F.S. + 2.5 % O.R. which could be converted to the relation of maximum possible deviation and displayed data under different flow speed as seen below.

Flow speed

The data displayed on the screen is the flow speed in the T-connector. In most cases it will be a bit faster than the flow speed of the same ordinary pipe at the same flow volume.

Cumulative flow speed

The accumulated flow rate continuously counts until manually reset.

The maximum limit for the accumulated flow rate is 999,999,999 Liters, and it will reset to zero once exceeded.

Specs

Cable wiring

Parameter setup

Set-up steps as below:

2. Connect cable first according to the cable wiring instructions on this page.

3. Set up parameter E06 for opening Analog current output function, and select the data content to be output.

4. The current range to be set up by using parameter E13 is 0-20mA or 4-20mA.

5. Parameter E07 and E08 are for specifying maximum and minimum value to output. These 2 values can be either positive or negative, however, E07 has to be smaller than E08.

6. Use E09 to set output current milliamps when output data is out of the E07 and E08 range.

7. Please enter the E11 parameter page to test and adjust 0mA/ 4mA output current. Adjustment unit is uA.

8. Please enter the E12 parameter page to test and adjust 20mA output current. Adjustment unit is uA.

10. Use parameter F01 for setting up the flow volume value to be simulated. Turn on F02 and go back to the monitoring screen.

11. Confirm that the external device receives the signal correctly.

12. Turn off F02 and go back to the monitoring screen.

13. Finish.

Specs

Cable wiring

Parameter setup

Set-up steps as below:

2. Connect cable first according to the cable wiring instructions on this page.

3. Set up parameter E01 for selecting NC(Normal Close) or NO(Normal Open) when there is no signal.

4. Set up parameter E02 for specifying output signal content.

   1. For selecting “pulse output”

      1. Use E03 to confirm each pulse width.

      2. Use F03 to simulate specific pulse output frequency at OCT for testing with external devices.

   2. For selecting “pulse v2”

      1. Use E03 to confirm each pulse width.

      2. Use E14 to determine each pulse capacity.

      3. F03 to simulate specific pulse output frequency at OCT for testing with external devices.

   3. For selecting “out of range flow volume notice”.

      1. Use D05 to turn on the alarm.

      2. Use D06 D07 for specifying normal flow range.

      3. Use D08 for specifying hysteresis range percentage. D07 is a positive value, it means the single range must exceed in order to disable the alarm.

      4. Set up F01 and F02 to simulate flow volume and go back to the monitoring screen to confirm if the alarm works.

      5. Turn off the simulation mode.

   4. For selecting “Total Alarm.” (“Inform of over total target”)

      1. Use D09 to turn off alarm.

      2. Use D10 for specifying notification conditions. "Larger Than" is for positive flow direction, "Less Than" is for negative flow direction.

      3. Use D11 for specifying total target, positive number is for positive flow, negative number is for negative flow.

      4. Set up F01 and F02 to simulate flow volume and go back to the monitoring screen to confirm the alarm works.

      5. Turn off the simulation mode.

5. Go back to the monitoring screen, finish.

Pulse output

The user uses parameter E13 to select a volume first, and the device outputs a digital square wave every time it accumulates through a specified volume.

Specs

Cable wiring

Parameter setup

Set-up steps as below:

2. Connect cable according to the cable wiring instructions on this page.

3. This machine uses Modbus RTU protocol, communication parameter set-up as below:

   1. Set E04 for Modbus ID , and please make sure there is no other device using the same address.

   2. Set E05 for specifying communication Baud, this machine supports 9600, 19200, 38400 and 57600.

4. Please go back to the monitoring screen. RS485 only responses on monitoring screens.

5. If needed, please use F01 and F02 to set up the machine to do a communication test under simulation mode.

7. Turn off F02 simulation mode.

8. Finish.

Advanced parameter setting (available since FW 2.3.0)

E15 Byte format

This setting provides 4 options.

ST stands for start bit, D0 ~ D7 are data bits, SP stands for stop bit.

OP and EP stands for Odd-parity and Even-parity respectively

E16 Bit order

This option controls the direction of the transfer and selects LSB or MSB first.

LSB first is typically used for Modbus RTU.

The figure below presents the difference with N-8-1 mode.

E17 Endianness

This setting controls the byte order of multi-byte data. This setting solely interacts with the byte order of replied data. The byte format of register address and length in the commands still conform to the examples provided by manual. The figure below presents the byte order for when converting number 1000 in IEEE-754 format.

Example

The command below requests instantaneous flow speed (abbreviated to FS) and totalized flow rate ( abbreviated to TF) from the device.

The first line is the command sent by the master device. It is not affected by the current settings. Please refer to Modbus 04 command for details.

The second line is the response from the flow meter in Big Endian format. From left to right, 0x01 to 0x08 and CRC1 to CRC2 are not affected by the current settings. The order of the instantaneous flow rate (indicated as FS+number) and the accumulated flow rate (indicated as TF+number) in the response is also unaffected. Because it is set as Big Endian, the four bytes of the instantaneous flow rate (represented by FS3 to FS0) will be returned starting from FS3. The four bytes of the cumulative flow (represented by TF3 to TF0) will be returned starting from TF3.

The third line is the response from the flow meter in Little Endian format. From left to right, 0x01 to 0x08 and CRC1 to CRC2 are not affected by the current settings. The order of the instantaneous flow rate (indicated as FS+number) and the accumulated flow rate (indicated as TF+number) in the response is also unaffected. Because it is set as Little Endian, the four bytes of the instantaneous flow rate (represented by FS0 to FS3) will be returned starting from FS0. The four bytes of the cumulative flow (represented by TF0 to TF3) will be returned starting from TF0.

Instruction example

Format of command (04) from master

Description of master command

The example will read instantaneous flow volume.

slave address: 01(address of this flowmeter)

function code: 04(read instruction)

Address of first reading register: 0000(Address of first register to read)

Quantity of registers to be read: 0002 (need to read 2 registers from 0000)

CRC: 71 CB(Calculating error correcting code according to CRC algorithm)

Format of flowmeter response(04)

Description of flowmeter response example

slave address: 01(address of this flowmeter)

function code: 04(read instruction)

Amount of response Byte: 04 (2 register=4 byte)

Data Byte: 00 00 00 00(Assume the instantaneous flow volume is 0)

CRC: FB 84(Calculating error correcting code according to CRC algorithm)

Definition and address of memory

How to use these charts

Read-only memory list

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.

01 Command Example

This command does not reset the C02.Del.Total (Clear Accumulated Total) option. It only provides the HMI with the ability to read Single Bit data using the 01/05 commands. If the command format is correct, the flow meter will respond to the master device with a Bit read acknowledgment.

Control Terminal TX (Transmit) Command Example for 01

Control Terminal TX (Transmit) Command Example for 01

• Slave Address: 01 (Address of the flow meter)

• Function Code: 01 (1-bit Read Command)

• Starting Address of Data to Read: 02 01 (Start address for C02.Del.Total Clear Accumulated Total)

• Data to Read (Bits): 00 01 (Read C02.Del.Total data)

• CRC: AD B2 (Error-checking code calculated using the CRC algorithm)

Flow Meter RX (Receive) Response Example for 01

• Slave Address: 01 (Address of the flow meter)

• Function Code: 01 (Read Command)

• Response Bit: 01 00 (The flow meter is still online and operational, responding to the control terminal)

• CRC: 51 88 (Error-checking code calculated using the CRC algorithm)

05 Command Example

This example activates the C02.Del.Total option to clear accumulated data, resetting the total to zero.

Control Terminal TX (Transmit) Command Example for 05

• Slave Address: 01 (Address of the flow meter)

• Function Code: 05 (Register Write Command)

• Starting Address of Data to Write: 02 01 (Start address for C02.Del.Total Clear Accumulated Total)

• Data to Write: FF 00 (Reset C02.Del.Total data)

• CRC: DC 42 (Error-checking code calculated using the CRC algorithm)

Flow Meter RX (Receive) Response Example for 05

• Slave Address: 01 (Address of the flow meter)

• Function Code: 05 (Register Write Command)

• Starting Address of Data to Write: 02 01 (Memory address for C02.Del.Total Clear Accumulated Total)

• Data Written: FF 00 (Acknowledgment of reset action sent back to the control terminal)

• CRC: DC 42 (Error-checking code calculated using the CRC algorithm)

For large numbers, reading and writing in different formats (float32/int64) may result in a discrepancy of less than 1/10,000.

Example Command:

Format for issuing the read command (03) from the control terminal.

This example reads the pipe diameter data of A02 Preset Pipe Spec.

• Slave Address: 01 (Address of the flow meter)

• Function Code: 03 (Read command)

• Starting Address of Data to Read: 00 00 (Starting address of the A02 Preset Pipe Spec data)

• Number of Registers to Read: 00 03 (Read three registers starting from address 00 00)

• CRC: 05 CB (Error-checking code calculated using the CRC algorithm)

Flow Meter Response Format (03)

Example Explanation of Flow Meter Response

• Slave Address: 01 (Address of the flow meter)

• Function Code: 03 (Read command)

• Number of Bytes Returned: 06 (3 registers = 6 bytes)

Data Bytes:

• 00 06 (Current type option: ASTM SCH 80 PVC)

• 00 00 (Reading A02 RS485 init)

• 42 41 (Reading A02 RS485 init)

CRC: 59 E5 (Error-checking code calculated using the CRC algorithm)

Instruction example

Format of command (06) from master

Description of master command

This example will change A01 pipe diameter option

slave address: 01(address of this flowmeter)

‌function code: 06(Single Register write instruction)

Address of first reading register: 0000(memory address to write)

Write data: 0000 (1" PVC pipe)

‌CRC: C40B (Calculating error correcting code according to CRC algorithm)

Format of flowmeter response(06)

Description of flowmeter response example

Valid command received. It will output the same command back to master.

‌slave address: 01(address of this flowmeter)

‌function code: 06(Single Register write instruction)

Address of first reading register: 0000(memory address to write)

Write data: 0000 (1" PVC pipe)

‌CRC: C40B (Calculating error correcting code according to CRC algorithm)

Read-write memory list

For large numbers, writing and reading in different formats (float32/int64) may result in a discrepancy of less than 1/10,000. This command is limited to memory with a register length of 4. Please refer to the provided list.

Example Command:

Format for Issuing the Write Command (30) from the Control Terminal

Example Explanation of Control Terminal Command

This example modifies the A18 Low Flow Cutoff value to 0 (default).

• Slave Address: 01 (Address of the flow meter)

• Function Code: 30 (Dual-register write command)

• Starting Address of Data to Write: 00 15 (Memory address for A18 Low Flow Cutoff)

• Data to Write: 00 00 00 00 (Set A18 Low Flow Cutoff value to 0)

• CRC: BC 07 (Error-checking code calculated using the CRC algorithm)

Flow Meter Response Format (30)

Example Explanation of Flow Meter Response

If the write command format is correct, the received control command will be echoed back to the master device.

• Slave Address: 01 (Address of the flow meter)

• Function Code: 30 (Dual-register write command)

• Starting Address of Data to Write: 00 15 (Memory address for A18 Low Flow Cutoff)

• Data to Write: 00 00 00 00 (Set A18 Low Flow Cutoff value to 0)

• CRC: BC 07 (Error-checking code calculated using the CRC algorithm)

Communications 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.

Terminology

‌‌Register: Length of 2 Byte or 16bit which is unit length of memory in Modbus RTU.

‌Byte: 8 bit length

Definition and function of memory

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. Detail information in following page:

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. 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. Please see read-write memory detail page below:

Read-write memory instruction detail information as below:

Instruction example

Format for Issuing the Write Command (31) from the Control Terminal

Example Explanation of Control Terminal Command

This example reads and writes data for C04 Dosing Target (64).

• Slave Address: 01 (Address of the flow meter)

• Function Code: 31 (Write command)

• Starting Address of Data to Write: 02 83 (Memory address for C04 Dosing Target (64))

• Data to Write: 00 00 00 00 00 BC 61 FF (Data for C04 Dosing Target (64))

• CRC: 1E F5 (Error-checking code calculated using the CRC algorithm)

Flow Meter Response Format (31)

Example Explanation of Flow Meter Response

If the write command format is correct, the flow meter will echo the received command back to the master.

• Slave Address: 01 (Address of the flow meter)

• Function Code: 31 (Write command)

• Starting Address of Data to Write: 02 83 (Memory address for C04 Dosing Target (64))

• Data to Write: 00 00 00 00 00 BC 61 FF (Data for C04 Dosing Target (64))

• CRC: 1E F5 (Error-checking code calculated using the CRC algorithm)

The Z category lists the most frequently used functions from other categories in sequence, allowing users to adjust the device more conveniently.

Z02 Auto Pipe Spec – Automatic Pipe Specification Detection

Z03 Auto Initialization – Automatic System Initialization

Activating this function allows the flow meter to adjust its signal state according to environmental conditions. This function should be executed after every reinstallation. It is identical to A21.

Z04 Auto Zero Offset – Automatic Zero-Flow Calibration

Ensure the pipeline is stationary and fully filled with liquid before executing this function to correct zero-flow errors. This function is identical to A22.

Z05 Scale Factor – Flow Scaling Factor Setting

Multiplies the measured flow data by a fixed ratio, adjustable from 0.001 to 1000. To configure negative flow measurement, refer to A17. This setting is synchronised with K03.

Usage Instructions for the Read-Write Memory List

Read-Write Memory List

K02 Calibration Mode

The simple calibration mode applies a formula to adjust the instantaneous flow rate:

Calibrated instantaneous flow = (K03 × uncalibrated instantaneous flow) − K04

Example 1 If the desired calibrated flow rate is half of the current displayed value, set K03 to 0.5, and leave K04 at the default value 0.

• Example:

  • Uncalibrated instantaneous flow: 5.0 L/min

  • Calibrated instantaneous flow: 2.5 L/min = 0.5 × 5.0 L/min

Example 2 For multi-point calibration requiring the addition or subtraction of a constant to maintain linearity:

Set K03 to 0.5 and K04 to 1.0.

• 4 L/min = 0.5 × 10 L/min − 1.0

• 9 L/min = 0.5 × 20 L/min − 1.0

K03 Scale Factor

A proportional adjustment to the flow rate, default is 1.0. This parameter is synchronised with Z05.

K04 Manual Offset

A fixed value is subtracted from the instantaneous flow rate according to the input. The unit matches the system setting.

• Example: Entering 1.0 subtracts 1.0 from the current flow. If the original flow is 3.0, the output becomes 2.0. Default value: 0.0. This parameter functions similarly to Zero Offset but operates independently.

K05 Totalizer Scale (Cumulative Total Ratio)

Adjusts the ratio of the amount added to the Totalizer from the calibrated instantaneous flow. It does not affect previously accumulated data. Adjustments amplify both positive and negative values.

• Use case: Maintain the same instantaneous flow data while accounting for differences in cumulative values (e.g., using density to reflect weight).

Default value: 1.0.

Formula:

New cumulative value = Previous cumulative value + (K05 × newly added calibrated flow)

Example: If the Totalizer currently increases by 1 L/min, and the cumulative value is 100 L, to double the accumulation rate without altering the flow rate, set K05 to 2.0:

• New cumulative value = 100 + 2 × 1 = 102 L

B01 Vol. Unit (Volume Unit)

The unit for instantaneous flow volume, default is L.

• Metric units: L (litres), m³ (cubic metres)

• Imperial units: U.gal (US Gallon), I.gal (Imperial Gallon), ft³ (cubic feet)

After selecting the command, please confirm whether to Save or Not Save.

B02 Time Unit

The time unit for flow rate, available options: seconds, minutes, hours, days.

• Default: minutes

After selecting the command, please confirm whether to Save or Not Save.

B03 Total Unit (Total Volume Unit)

The unit for cumulative and historical volume measurements, default is L.

• Metric units: L (litres), m³ (cubic metres)

• Imperial units: U.gal (US Gallon), I.gal (Imperial Gallon), ft³ (cubic feet)

After selecting the command, please confirm whether to Save or Not Save.

B04 Velocity Unit

The unit for flow velocity and sound velocity, default is m/s.

• Metric unit: m/s (metres per second)

• Imperial unit: ft/s (feet per second)