AHRS500GA Series Operator’s Manual
Doc# 7430-0060-02 Rev. A
Page 23
9.4.2
Switch to Mag Cal Mode
Start the magnetic calibration by moving the calibration switch on the
calibration/maintenance cable to the ON position. The AHRS500GA will
use all the subsequent measurements while the switch is in the ON position
to model the magnetic environment. At this time, the following BIT status
should be displayed:
9.4.3
Collecting Calibration Data
Make one complete turn, with the aircraft close to level on the tarmac,
compass rose, etc. The aircraft does not have to be perfectly level, as the
algorithm will compensate for any angle offsets, but running the test with
the aircraft as close to level as possible will ease the process. The
AHRS500GA monitors the data and calculates when a full turn is
completed. At the completion of the full circle, the AHRS500GA will reset
itself into initialization mode and apply the estimated magnetometer
calibration parameters. The turn indicator bit will come on while the
AHRS500GA is being moved through the turn and the GyroView BIT
status panel will have the following appearance during the turn:
SYSTEM STATUS:
READY
BIT 10: OFF
BIT 9: OFF
MAG CAL DATA STAT:
NOT ACCEPT
BIT 13: ON
MAG CAL MODE:
ON
BIT 11: ON
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