# 8.2.7 Calibrate Pump Flow Calibrate the pumps when facing issues such as inconsistent spraying, changing the type of nozzle, or replacing the pump. This ensures accurate and reliable performance. **Step 1**: To initiate the calibration of pump flow, tap on the "**Calibrate**" button located in front of "**Calibrate Pump Flow**" on the main screen of the spraying system. The following screen will be displayed.

1\. Choose the nozzle model. 2\. Ensure that any remaining air is manually discharged. 3\. Add 1 litre of water into the spray tank as part of the calibration process. 4\. Click the "**Start**" button to commence the calibration of the pump flow. A prompt will appear, instructing the user to add 1 litre of water to the tank, as displayed in the following screen.

**Step 2**: Once the user has added 1 liter of water to the tank, click the "**Start**" button to continue. The following screen will then be displayed.

Enter the value of the filled water in the tank, then click on the "**Start**" button. The calibration process will commence and display the following screen on the display.

Please wait patiently until the calibration process is completed. Once the process finishes, click on the '**Done**' button to proceed. **Step 3:** After the calibration is completed, the user will be prompted with the question: "**Does the user see any residue?**" Users can respond with either "**Yes**" or "**No**," as indicated in the following screen.

If the user finds any residue, click on "**Yes**," and the system will prompt the user to repeat the calibration process. If there is no residue, click on the "**No**" button, and the system will display a message indicating that the calibration was successful, as shown in the following screen on the display.