# 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="https://3726973265-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEJHDgY5EjEXnZCA7cAxk%2Fuploads%2Fs9AVeEpAfB034XdsectJ%2Fimage.png?alt=media&#x26;token=e3b80172-0ba3-4924-b4a1-e3c8c40a9a9e" 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="https://3726973265-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEJHDgY5EjEXnZCA7cAxk%2Fuploads%2FJRZbLJojDXmHgTRi9XgE%2Fimage.png?alt=media&#x26;token=eadcd82f-2d74-4bb5-970f-8c43376f874d" 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="https://3726973265-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEJHDgY5EjEXnZCA7cAxk%2Fuploads%2FLt5t7HcuB4XiVNOzQ1qQ%2Fimage.png?alt=media&#x26;token=29accac0-7d68-4982-a944-6aa50be9ea8c" alt=""><figcaption><p>Calibrating flow meter finish</p></figcaption></figure>

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