Magnetometer Interference - Garmin G1000 Maintenance Manual

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Procedure E: Magnetometer Interference Test
This procedure validates that no electronic device is interfering with the operation of the GMU
magnetometer which directly impacts the determination of attitude and heading by the GRS.
Calibration Procedures A-1 through D are not required prior to this execution of this procedure.
1. Enter Configuration Mode and go to GRS/GMU Calibration page as shown in Figure 7-10.
2. This page is protected and requires a keystroke password to perform this test. Press the
following softkeys in sequence: 9, 10, 11, and 12.
3. Select GRS unit and press the ENT key.
4. Select MAG INTERFERENCE TEST and press the ENT key.
5. Follow the checklist items displayed on the PFD, and press the ENT key as each one is
completed or confirmed.
rd
The 3 item on the checklist instructs the operator to "prepare a detailed
test sequence with precise start and stop times for exercising all
electronic devices". Only the electronic devices that are likely to affect the
operation of the GMU 44 magnetometer need be included in the test
sequence. The list of relevant electronic devices will vary from aircraft to
aircraft. An example of an appropriate test sequence is given in Table 7-
2.
G1000 System Maintenance Manual
190-00907-00
Figure 7-10. Magnetometer Interference
NOTE
Page 7-25
Rev. B