
G1000 System Maintenance Manual – Diamond DA40/40F Page 7-33
190-00545-01 Revision G
5. Press the ENT key on the PFD to conclude this procedure and proceed to the GRS/GMU Testing
section.
7.7.2.5 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.
Figure 7-16. Magnetometer Interference Test Page
1. Enter Configuration Mode and go to GRS/GMU Calibration page as shown in Figure 7-16.
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.
NOTE
The 3
rd
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.
Table 7-6. Magnetometer Interference Test Sequence (Example)
Elapsed Time
since Start of
Test (min:secs)
Action
0:00 Test begins
0:10 Aileron full right
0:20 Aileron full left
0:30 Aileron level
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