EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 151-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
With aircraft stationary at (POSITION 1) of Figure 10.24 press the “START CALIBRATION”
line select key. The annunciation shown in Figure 10.26 will be displayed with a
countdown timer that begins with 10 secs and counts down to 0 secs.
CAUTION: Do not press ACCEPT Calibration without moving the aircraft in the
procedure below as corruption to the configuration module could occur.
MAGNETOMETER CALIBRATION
IN PROGRESS
DO NOT MOVE THE AIRCRAFT FOR
THE NEXT 7 SECS
Figure 10.26 – Calibration in Process
When the menu of Figure 10.27 is displayed immediately begin taxiing the aircraft
clockwise or counter-clockwise at a constant rate of no faster than 1 turn every 30
seconds. About half normal taxi speed or a brisk walking speed is about right.
Approximately 10 seconds after initial movement (see POSITION A) the aircraft should
be taxiing at a constant rate (CR) throughout the rest of the procedure. When the
countdown timer is reached between one and a quarter turns (450º) (POSITION B) and
two turns (720º) (POSITION D) should have been completed. While turning the aircraft
do not stop the aircraft until the end of the 60 second timer and Figure 10.28 appears.
If you find that the timing of the turns was not right such that “Magnetometer
Calibration Complete” message occurs between B & D of Figure 10.24, then REJECT the
results and re-run the procedure.
MAGNETOMETER CALIBRATION
IN PROGRESS
TURN THE AIRCRAFT
NO FASTER THAN
1 CIRCLE IN 30 SECS
UNTIL TIMER STOPS
TIME REMAINING: ## SECS
Figure 10.27 – Aircraft Turning
At the end of the calibration routine the “ACCEPT CALIBRATION?” and “REJECT
CALIBRATION?” menu options will be enabled.
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