190-01115-01
G3X/G3X Touch Install Manual - GDU 4XX Config and Post Install Checkout
Rev. AC
Page 34-25
34.4.6.2
Magnetic Interference Test
NOTE
The Magnetic Interference Test is only 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 magnetometer. Such changes include, but are not
limited to, wiring, shielding, or grounding changes to any light, strobe, beacon, or other
electrical device located in the vicinity of the GMU magnetometer unit. Likewise, this test
should also be repeated to verify all subsequent changes to materials within 10.0 feet of
the GMU magnetometer. Such changes include but are not limited to: addition, removal,
or modification of ferrous or electrically conductive materials located in the same wing as
a GMU magnetometer unit. 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 GSU 25/GSU 73 AHRS. The ADAHRS Unit
Orientation (
) and Pitch/Roll Offset Compenstion (
) are
not required prior to this execution of this procedure.
CAUTION
The real time readout displayed during the interference test is only valid for the
location of the GMU when the test was initiated. If using this procedure to
evaluate multiple mounting locations, the test must be started over for each
location, failure to do so could provide incorrect test results.
NOTE
Garmin recommends this test be performed at least once every 12 months.
1. Power on PFD1 in configuration mode (
), this step can be skipped if PFD1 is already
in configuration mode.
2. Use the Touch Panel or a Move Selector Knob to select the Magnetometer Calibration Page.
3. Ensure that all the required status boxes are checked (
). Use the Touch
Panel or a Move Selector Knob to select the ADAHRS (1, 2 or 3) that is being configured.
4. Use the Touch Panel or a Move Selector Knob to select Magnetic Interference Test.