Gsu 25/Gsu 73/Gmu 22 Post-Installation Calibration Procedures; Post-Installation Calibration Procedure Summary - Garmin G3X Installation Manual

19.3 GSU 25/GSU 73/GMU 22 Post-Installation Calibration Procedures

After mechanical and electrical installation of the GSU 25/GSU 73 AHRS and GMU 22 magnetometer
have been completed, prior to operation, a set of post-installation calibration procedures must be carried
out.
Table 19-1 describes the calibration procedures:
Table 19-1 Post-Installation Calibration Procedure Summary
Calibration
Procedure Name
Procedure
A AHRS Orientation
Pitch/Roll Offset
B
Compensation
Magnetometer
C
Interference Test
Magnetometer
D
Calibration
Engine Run-Up
E
Vibration Test
190-01115-01 G3X Installation Manual - Post Installation Checkout and Calibration Procedures
Rev. L
Procedure
Description
Validate GSU
Procedure A is required for all installations
Orientation
Level Aircraft Procedure B is required for all installations
Procedure C is required for initial installation
verification.
This test should also be repeated to verify all
subsequent electrical changes associated with
devices within 10.0 feet of the GMU 22
magnetometer. Such changes include, but are
not limited to, wiring, shielding or grounding
Validate no changes to any light, strobe, beacon or other
magnetic electrical device located in the vicinity of the GMU
interference 22 unit. Likewise, this test should also be
with GMU 22 repeated to verify all subsequent changes to
materials within 10.0 feet of the GMU 22. Such
changes include, but are not limited to, addition,
removal or modification of ferrous or electrically
conductive materials located in the vicinity of the
GMU 22 unit.
Garmin recommends this test be performed at
least once every 12 months.
Procedure D is required for all installations.
This calibration must be performed after every
Compass Rose
Pitch/Roll Offset Compensation and following a
Taxi Maneuver
removal or replacement of the GMU 22 unit, or
degaussing of the area near the GMU 22 location.
Validate
vibration
Procedure E is required for all installations
characteristics
of installation
Installations Requiring Procedure
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