# A04 Damping

### Definition

* A04 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 **A04** 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 **A04** 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:** **A04** 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 **A04**, it is recommended to observe the system operation for several minutes to verify that the setting meets the application requirements.
5. **Usage Reminder:** Setting **A04** too high may cause delayed response to flow changes. Adjust according to the actual application scenario.

### Operation 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 Direction Buttons:
  * <img src="/files/2e37e572251371c6020ab6d9e11c1fcdd5ef0369" alt="" data-size="line"> **Left Gray:** Previous Page, decrease value, or select item
  * <img src="/files/50a67ff5744401e217d5b9e838da3f7909be732f" alt="" data-size="line"> **Right Gray:** Next Page, increase value, or select item
* <img src="/files/uJJ6BEZ4sukIlwQaHrUB" 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>

```
A04 Damping Setting Steps
• From the main screen(green backlight), 
press Orange Button(Setup) to enter settings (orange backlight).
• Select A. Measurement by pressing Orange Button(Enter).
• Use Gray Arrow Buttons to select A04 Damping, press Orange Button(Enter).
• Use Gray Arrow Buttons to choose the digit to adjust(highlighted in dark gray).
• Adjust digits: Left Gray Button to increase, Right Gray Button to decrease.
• Press Orange Button(Set) to save the adjusted value.
• Confirm by pressing Orange Button(Save) (or Blue Button(NOT) to cancel).
• Press Blue Button(ESC) to return to the main screen(green backlight).
```

### A04 Options, RS485 Values, Read/Write Commands, and Formats&#x20;

| Parameter Input Range | RS485 Value |
| --------------------- | ----------- |
| Default               | 3           |
| Minimum               | 0           |
| Maximum               | 600         |


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