DJI A2 - Manual (Page 22)

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1.3 Compass Calibration
The Compass can assistant the GPS to position the aircraft, which is very important during flight. As we know,
the compass is very sensitive to electromagnetic interference, which will cause abnormal compass data, and lead
to poor flight performance or even flight failure. Compass Calibration MUST be done for first time use.
It is recommended to calibrate the compass outdoors after the Controller Unit finds 7 or more GPS satellites.
Regular calibration enables the compass to keep optimal performance.
Calibration Cautions
(1) DO NOT calibrate your compass where there is strong magnetic interference, such as magnetite,
car park, and steel reinforcement under the ground.
(2) DO NOT carry ferromagnetic materials with you during calibration, such as keys or cell phones.
(3) Compass Calibration is very important; otherwise the flight control system cannot work.
Calibration Procedures
Choose an open space to carry out the following procedures.
Control
Mode LED
Quickly flip the control
mode switch
360 o Rotate the aircraft
horizontally
360 o Rotate the aircraft
vertically (Nose downward)
Position1*
Position 3
Position1->3->1 once
Start horizontal calibration Start vertical calibration Succeed Fail
Position1->3->1
Flip 6~10 times
Start
cali
Re-calibrate Position1*
Position 3
Situations that require recalibration
Situations Descriptions
Compass Data abnormal LED blinks yellow and green alternatively( ( ∝ )).
Flying field altered Flying field has changed over a long distance.
Mechanical alteration
The mounting position of GPS-COMPASS PRO module changes.
Electronic units such as Controller Unit, CAN-HUB, battery etc. have been added,
removed, remounted or other alterations.
Mechanical structures of the aircraft has changed
Drifting during flying Evident drifts occurred in flight such as the aircraft doesn’t fly straight
Attitude errors LED often blinks error indicator when the aircraft turns around.