# 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** 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 (highlighted in yellow). The value may fluctuate slightly; it is recommended to observe for a while and enter the **average value** into **A23**.

<figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2FSTc1wRbDTVfUUnmF3CEJ%2FH10%20Debug%20Page.png?alt=media&#x26;token=13289157-555d-4754-ade9-38b4417a56e6" alt="" width="375"><figcaption><p><strong>Debug Screen</strong> <em>(actual values may vary depending on conditions)</em></p></figcaption></figure>

### Notes

N/A

### Operation Procedure

<details>

<summary><strong>Button Functions (Click to Expand)</strong></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="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/BZuNjMgY75LH0onY5NtL/image" alt="" data-size="line"> **Blue Button -** Leftmost button: Return, exit, or save settings.

Gray Arrow Buttons:

* <img src="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/Br88VpmnPLAPdutxVdZb/image" alt="" data-size="line"> **Left Gray Button:** Page up, increase value, or select item
* <img src="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/3Dzp8nuxmHsaZ7LqBscw/image" alt="" data-size="line"> **Right Gray Button:** Page down, decrease value, or select item
* <img src="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/sq6fX6r39JE0Au2hahAR/image" 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>

```
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).
```

<figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2F0d8lSZHITCVQuHFUoGl2%2FFU-LT-A23-en.png?alt=media&#x26;token=4a94addf-723a-4967-aa22-0125692478f0" alt="" width="375"><figcaption></figcaption></figure>

### 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                  | -             |