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©
2022 DJI All Rights Reserved.
39
AGRAS T40/T20 P
Unmanned Aircraft Flight Manual
5. Make sure propellers are securely mounted, that there are no foreign objects in or on the motors and
propellers, that the propeller blades and arms are unfolded, and the arm locks are rmly tightened.
6. The FPV camera and binocular vision system are clean and in good condition.
7. Make sure the spraying system is not blocked in any way.
8. Make sure the sprinkler hoses are clear from bubbles. Discharge any bubbles as they may affect the
performance of the sprinkler.
System Starting
1. Press the power button on the remote controller and then press and hold to power on the remote
controller. Make sure that DJI Agras is open.
2. Press the power button on the Intelligent Flight Battery and then press and hold to power on the
aircraft.
3. Check the home screen in DJI Agras to make sure that the aircraft is connected to the remote
controller.
4. If using RTK for positioning, make sure that the RTK signal source is correctly set (D-RTK 2 Mobile
Station or Network RTK service). Go to Operation View in the app, tap
and select RTK to view and
set.
Set the RTK signal source to None if RTK positioning is not in use. Otherwise, the aircraft is not able
to take off when there is no differential data.
5. Wait for satellites to be searched, make sure that there is a strong GNSS signal, and make sure the
aircraft heading measurement using the dual antennas is ready. (If the dual antennas are not ready
after waiting for an extended period, move the aircraft to an open area with a strong GNSS signal.)
Calibrating the Flow Meter
Make sure to calibrate the flow meter before using for the first time. Otherwise, the spraying performance
may be adversely affected.
1. Fill the spray tank with approximately 2 L of water.
2. In the app, go to Operation View, tap
, then , and tap Calibration on the right side of the ow
meter calibration section.
3. Tap Start Calibration and calibration will start automatically. The result of the calibration will be
displayed in the app when completed.
After calibrating successfully, users can proceed with the operation.
If calibration fails, tap “?” to view and resolve the problem. Recalibrate once the problem is
resolved.
During calibration, tap , then to cancel. If the calibration is cancelled, the accuracy of the
ow meter is based on the data before the calibration was started.
When to Recalibrate
1. Using a liquid of a different viscosity.
2. The error between the actual value and the theoretical value of the completed area is more than 15%.
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