Garmin G5 Maintenance Manual page 49

1. Select the Air Data configuration page.
2. Select Calibrate Static Pressure.
3. Ensure all on-screen instructions have been complied with, then press Start.
4. At each calibration point the display will present a screen indicating the pressure altitude to set.
Once the altitude is set, select Ready to calibrate this pressure.
5. During the calibration at each pressure, the pressure must be held constant for 30 seconds for the
calibration step to be successful. The calibration may be cancelled at any point should the test
setup require adjustment before repeating. A progress screen will be displayed showing the status
of the test.
6. Select Done when the static pressure calibration is successfully completed.
7.5.3 Calibration Procedure D: GMU 11 Magnetometer Calibration
NOTE
All selections made in configuration mode in this section are made on the G5 ID strapped as #1.
In a single G5 installation, Unit ID #1 is always the single G5 unit. In a Dual G5 installation,
Unit ID #1 is the G5 in the Attitude or Turn Coordinator position.
CAUTION
This magnetometer calibration procedure should be carried out on a compass rose to guarantee
measurements free of environmental magnetic disturbances. If a compass rose is not available a
sight compass can be used. Attempting to carry out this procedure on a typical ramp area may
not yield a successful calibration. The accuracy of the heading display on the G5 cannot be
guaranteed if this calibration is not performed on a magnetically clean and level surface.
NOTE
A magnetometer calibration failure is indicated by a "Magnetometer not Calibrated" message on
the G5 on power up. If necessary, move the aircraft to a different location and attempt the
magnetic calibration again.
1. Start the aircraft engine in accordance with the aircraft AFM or POH.
2. After aircraft engine startup, taxi the aircraft to a properly calibrated compass rose.
3. At the compass rose, align the aircraft to a heading of magnetic north (+/- 10°).
4. Restart the G5 in configuration mode.
5. Go to the "Magnetometer" page Group on the G5 unit.
6. Select the "Calibrate Magnetometer..." page.
7. The G5 will display instructions. Follow the on-screen instructions and select "Next" to cycle
through each page of instructions.
8. On the final page, select "Start" to begin the calibration.
9. The G5 display advises the operator when to turn the aircraft, when to stop, and when to turn
again.
10. Upon instruction to turn, taxi the aircraft in a right turn. After approximately 25° to 30° of turn
from the last heading, the G5 display advises the operator when to stop the aircraft.
NOTE
If smooth accurate turns are not made, the G5 may incorrectly interpret a station and instruct to
"Hold current position..." prior to or after completion of the heading change. If this scenario is
encountered, it is best for the operator to temporarily ignore the "Hold current position..."
Garmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual
Page 41 of 54
190-01112-11
Rev. 7