> For the complete documentation index, see [llms.txt](https://aerogcs-green-docs.aeromegh.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://aerogcs-green-docs.aeromegh.com/8.-rpa-settings/8.2-spraying-system/8.2.8-calibrate-flow-meter.md).

# 8.2.8 Calibrate Flow Meter

Calibrating the liquid level is essential to maintain the accuracy of the remaining payload measurement.

To initiate the calibration of the flow meter, tap on the "**Calibrate**" button located in front of the "**Calibrate Flow Meter**" on the main screen of the spraying system. This action will bring up the following screen on the user’s display. 

<figure><img src="/files/i2ZI5C6mRrsPgsJT2OXt" alt=""><figcaption><p>Calibrates flow meter</p></figcaption></figure>

1\.      After releasing air from the tank and pipes, add water into the tank.

2\.      Choose the tank capacity from the drop-down menu.

3\.      Click the 'Start' button to commence the flow meter calibration process.

As shown in the following screen&#x20;

<figure><img src="/files/QI2d8B6Ar8x3x6uiC5uy" alt=""><figcaption><p>Select tank capacity</p></figcaption></figure>

Follow the instructions displayed on the screen to complete the calibration process. When the tank is empty, click on the “**Stop**” button to finish, as illustrated in the following screen.&#x20;

<figure><img src="/files/9zOBgfXyCTjPCnJ6HTaX" alt=""><figcaption><p>Calibrating flow meter finish</p></figcaption></figure>

After clicking “**Stop**” a calibration successful message will be displayed on the screen.