Magnetometer Calibration - Garmin G1000 Maintenance Manual

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c. Ensure that the GRS1 is selected.
d. Select PITCH/ROLL OFFSET, then press the ENT key.
e. Follow the checklist items displayed on the PFD and press the ENT key as each one is
completed or confirmed. When the CALIBRATE field is blinking, press the ENT key to
begin the procedure.
f. After several seconds, a new checklist appears in the lower half of the PFD. Press the
ENT key as each item is confirmed. When the CONFIRM AIRCRAFT IS LEVEL field is
blinking, press the ENT key to continue.
g. The result of the pitch/roll offset compensation is displayed on the PFD. If successful,
the AHRS records the required pitch and roll offsets, informs the operator of a successful
conclusion and returns to normal operation.
h. Press the ENT key on the PFD. Repeat steps 1 through 4 for GRS2.
Procedure B: Magnetometer Calibration
The Magnetometer Calibration Procedure must be carried out at a site that is free of magnetic
disturbances. A Site Evaluation for Magnetic Disturbances can be performed for Magnetometer
Calibration Procedure if a compass rose is not available or may not be free of magnetic
interference (i.e. lamp poles or a blast fence installed nearby). The accuracy of the GRS 77 and
GMU 44 cannot be guaranteed if this calibration is not performed on a magnetically clean area.
Page 7-18
Rev. B
Figure 7-8. Magnetometer Calibration
G1000 System Maintenance Manual
190-00907-00