Instruction Manual

Page 5-70 G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air
Revision 8 190-00915-01
5.15.4 Calibration Procedure E: Magnetometer Interference Test
A magnetometer interference test is available for troubleshooting and/or verifying a magnetically ‘clean’
installation of the GMU 44. This test exercises various devices on the aircraft that could potentially
affect the magnetic field as measured by the GMU 44.
NOTE
This test is used to validate that no electronic device
or magnetized components produce a
magnetic field sufficient to interfere with the operation of the GMU 44 magnetometer. It is
highly recommended that this test be performed after installation or maintenance of
electrical components on the aircraft and/or for troubleshooting the GMU 44.
Figure 5-7, Magnetometer Interference Test
1. Initiate the AHRS magnetometer interference test procedure by performing the following steps:
2. On PFD1, enter Configuration Mode and go to GRS/GMU Calibration page as shown in Figure
5-7.