AvMap A2 ADAHRS - Manual (Page 12)

12 - User and Installation Manual
AvMap A 2 ADAHRS
User and Installation Manual - 13
AvMap A 2 ADAHRS
Compass Calibration and Test flight
The purpose of this procedure is to compensate magnetic disturbances the A2 is subject to,
due to aircraft metal structures and electromagnetic components. These disturbances, if not
compensated, could alter the heading value provided by the system.
For this reason the compass indicator is always marked as out of order (i.e. crossed) before the
Compass Calibration procedure is executed.
Note: Compass Calibration is required in all scenarios after a proper Attitude Calibration is
fulfilled.
WARNING : magnetometer calibration data is invalidated after every attitude calibration
procedure (full attitude calibration and horizon alignment). Make sure to properly calibrate attitude
before proceeding with Compass Calibration.
The Compass Calibration procedure must be executed in-flight and requires to steer the aircraft
in 4 directions and execute some pitch up/down maneuvers. The total duration for this procedure
is about 4 minutes.
Pitch up + 20°
Pitch down - 20°
Figure 9