Set the aircraft in level and straight ight attitude by using jacks or blocks.
Let the system stabilize for about 30 seconds and make sure that the aircraft is not moving.
Then conrm by pressing “NEXT”.
Note: The calibration calculation for south direction will start and a counter will inform
of the progress.
STEP 5: Calibration calculation for west direction
The Ultra display shows: “Point to WEST. Press NEXT when ready”.
Have the aircraft nose pointed to the magnetic west (270°) radial on the airport compass rose.
Set the aircraft in level and straight ight attitude by using jacks or blocks.
Let the system stabilize for about 30 seconds and make sure that the aircraft is not moving.
Then conrm by pressing “NEXT”.
Note: The calibration calculation for west direction will start and a counter will inform
of the progress.
STEP 6: Check compass calibration
At the end of the calibration process the Ultra will conrm if the magnetometer is
calibrated successfully.
The message “Calibration done” will pop up.
Note: In the SETUP page after COM 1 will be written “ENABLED MAG”.
IMPORTANT: Don’t power o the system. Let the system stabilize for about 15 minutes
before moving the aircraft.
Note: In the “SETUP” menu you can choose to display compass heading in reference to
magnetic north or true north (see chapter 4).
Note: If the calibration fails or the compass indicator is not enabled, repeat the
calibration procedure. If several calibration attempts fails review the installation
location of the Ultra. Magnetic disturbance could be too high in the area selected. In
alternative, in some aircrafts is experienced that a more precise calibration can be
achieved by performing the compass calibration in flight. In flight the aircraft is in a
stable and normal flight condition, which is favourable for calibrating the magnetometer
and correct magnetic interference. For performing the compass calibration in flight,
follow the same calibration instructions and use another source (GPS or compass) to
fly into the requested direction. Calibration in flight should be performed by a second
person (not the pilot) in safe and stable flight conditions. AvMap disclaims any liability.
3.3 Altimeter calibration
Ultra EFIS contains a barometric altimeter. The included pressure sensor measures
atmospheric pressure in order to determine your altitude above mean sea level. The
pressure sensor is calibrated at the factory. Nevertheless, due to fluctuations in pressure
over time, it is important to periodically calibrate the altimeter to maintain accurate
readings.
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