# 8.2.1 Spray testing

Users can test the spraying speed before the actual flight using this functionality. Tap on "**Spray testing**" from the main screen of the Spraying System Settings. The user will see the following screen. 

<figure><img src="https://3726973265-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FEJHDgY5EjEXnZCA7cAxk%2Fuploads%2FrZd4mv5VjAke4AHHoFXq%2Fimage.png?alt=media&#x26;token=afd59372-48b0-4e7a-8462-6cdfd2df9b9e" alt=""><figcaption><p>Spray testing</p></figcaption></figure>

Adjust the spraying percentage using the slide bar, then click the "**OK**" button to conduct a test run with the selected value. **Ensure that the tank is filled with liquid, and the pumps are turned on during this process.**