DJI Phantom FC40 User Manual

Page 15

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Compass Calibration

If the compass module is not used, you can skip this step.

The GPS module has a built-in magnetic field sensor for measuring the geomagnetic field, which is not the same in

different areas. The GPS module will not work unless the compass module has been connected. Make sure the compass

module connection is correct.

Always keep the compass module away from the magnet. If this situation occurs please change the compass module

before flying. Otherwise it may damage the compass module and lead the aircraft to work abnormally or even be out of

control.

Calibrate the compass before the first flight or when flying in a different area.

Make sure to keep away from

ferromagnetic substance and other electronic equipment when calibrating or flying. If you keep having calibration

failure, it might suggest that there is magnetic interference or other ferromagnetic substance, please avoid flying in this

area.

If you have calibration failure or the LED flight indicator blinks red and yellow lights alternately (

), please

connect to the Assistant Software, select the “Tools” tab and follow the tips of the “IMU Calibration” to do operation.

1. Quickly switch control mode switch from GPS Mode to ATTI. Mode and back

to GPS Mode for 6 to 10 times, The LED flight indicator will turn to constantly

yellow.

2. Rotate your aircraft around the horizontal axis (about 360

) until the LED

flight indicator changes to constant green, and then go to the next step.

3. Hold your aircraft vertically and rotate it (its nose is downward) around the

vertical axis (about 360

) until the LED flight indicator turns off, meaning the

calibration is finished.

4. If calibration was successful, calibration mode will exit automatically. If the

calibration has failed, the LED flight indicator keeps flashing quickly Red.

Switch the control mode switch one time to cancel the calibration, and then

re-start from step 1.

GPS Mode

ATTI. Mode

GPS Mode -> ATTI. Mode -> GPS

Mode is one time

，quickly switch

6 to 10 times

Horizontal Rotation

Vertical Rotation