> For the complete documentation index, see [llms.txt](https://docs.lorric.com/qr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lorric.com/qr/fu-lt-english-v1/installation-and-setup/parameter-settings.md).

# Parameter Settings

### Setup Procedure

<details>

<summary><strong>Button Functions</strong> <em>(Click to Expand)</em></summary>

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:

* <img src="/files/bdd75120acea6361d128fd3deec06f1a8277e667" alt="" data-size="line"> **Blue Button -** Leftmost button: Return, exit, or save settings.

Gray Arrow Buttons:

* <img src="/files/2e37e572251371c6020ab6d9e11c1fcdd5ef0369" alt="" data-size="line"> **Left Gray Button:** Previous Page, decrease value, or select item
* <img src="/files/50a67ff5744401e217d5b9e838da3f7909be732f" alt="" data-size="line"> **Right Gray Button:** Next Page, increase value, or select item
* <img src="/files/6c0b22a2048cf9b2afd86fac7a65e414feb967d4" alt="" data-size="line"> **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 %}

</details>

{% 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](/qr/fu-lt-english-v1/parameters/h-system/h04-language.md).

{% code fullWidth="false" expandable="true" %}

```
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.
```

{% endcode %}

<img src="/files/MY1yHnQJkMbTjQpdnj3r" alt="" width="375">
{% endstep %}

{% step %}

### Pipe Setting

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](/qr/fu-lt-english-v1/parameters/a-measurement-setup/a02-preset-pipe-spec.md).

```
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 language, press Orange Button(Set) to confirm.
• Press Blue Button(ESC) to return to main screen.
```

<img src="/files/NjMZGiSrmGG1q1M4OPjV" alt="" width="375">
{% endstep %}

{% step %}

### A04 Pipe Outer Diameter&#x20;

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-lt-english-v1/parameters/a-measurement-setup/a04-pipe-outer-diameter.md).

```
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).
```

<img src="/files/YCRbDbRZQhmrFJRaI0hF" alt="" width="375">
{% endstep %}

{% step %}

### A06 Pipe Thickness&#x20;

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.

```
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).
```

<img src="/files/96TcdOAzZKRABlLtOEnp" alt="" width="375">
{% endstep %}

{% step %}

### A08 Pipe Material

Set the pipe material. If no matching option is available, select custom. Please refer to [A08 Pipe Material](/qr/fu-lt-english-v1/parameters/a-measurement-setup/a08-pipe-material.md).

```
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 %}

<img src="/files/ISc4jIgVe0nTtqQ0zk9N" alt="" width="375">

| A08 Available Pipe Materials                                                        |
| ----------------------------------------------------------------------------------- |
| custom (default), PE, PFA, Copper, SUS316, SUS304, Steel, ABS, PVDF, PP, PVC, PVC-U |
| {% 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-lt-english-v1/parameters/z-easy-setup/z03-auto-initialization.md).&#x20;

{% hint style="danger" %}
Z03 must be executed with the pipe fully filled.\
Running it when not full will cause measurement errors.\
If this happens, re-run Z03 under full-pipe conditions.
{% endhint %}

{% hint style="info" %}
Z03 Auto Initialize must be performed with the pipe completely full.\
Under full-pipe conditions, whether the fluid is flowing or stationary does not affect the result.
{% 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 the lower-left blue ESC button to return to the main screen (green backlight).
```

<img src="/files/0wmMXtz71myc2ZEhYq8J" alt="" width="375">
{% 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.

<img src="/files/180a011cb1087b8606214a1a8e59b90e9ca2eb81" alt="" width="375">
{% endstep %}
{% endstepper %}

### **Troubleshooting**

If any of the following issues occur during installation or setup, adjust the system as instructed.

<details>

<summary><strong>Rapid Fluctuating Readings</strong></summary>

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-lt-english-v1/parameters/a-measurement-setup/a15-damping.md)

</details>

<details>

<summary><strong>No Zero at Zero Flow</strong></summary>

**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 (examples).

**Model-Specific Lower Limit Recommendations (Example):**

* FU-LT 008 → 1 LPM
* FU-LT 010 → 1 LPM
* FU-LT 015 → 2.5 LPM
* FU-LT 020 → 2.5 LPM
* FU-LT 025 → 5 LPM

Refer to [A18 Low Flow Cutoff](/qr/fu-lt-english-v1/parameters/a-measurement-setup/a18-low-flow-cutoff.md)

</details>

<details>

<summary><strong>Incorrect Positive/Negative Sign Display</strong></summary>

If the flow meter shows the wrong sign, adjust the detection direction in [**A16 Direction**](/qr/fu-lt-english-v1/parameters/a-measurement-setup/a16-direction.md).

</details>

<details>

<summary><strong>Unit Adjustment</strong></summary>

To change the display unit, go to [**B Unit**.](/qr/fu-lt-english-v1/parameters/b-unit-setup.md)

</details>

### **Advanced Calibration Settings**

Refer to the full parameter table for detailed settings.\
See: [**Full Parameter Reference**](/qr/fu-lt-english-v1/parameters.md)


---

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