Page 5-3
TL-3524 USER`S MANUAL
Rev. B
P/N 03-3524-2003
5.8 Restore Factory Calibration
Any time you can go back to the factory calibration done
according to the pressure datum traceable to the National
Bureau of Standards.
ADJUST ALTITUDE
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ADJUST: -280m +/- 30m
ACTUAL:
253m
DIFFERENCE:
1
ALTITUDE
encoder
YES
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RESTORE
FACTORY
CALIBRATION?
?
NO
ALTITUDE
encoder
5.9 Do Your Calibration
1.
The calibration should be done with both the primary flight
altimeter and the TL-3524 at the same ambient temperature
within the range of +15 to +35°C (+55 to +95°F). The
power supplied to the TL-3524 should be of the same
nominal voltage as the power of the aircraft, to which it is to
be installed.
2.
Connect the power to the TL-3524 for at least 5 minutes
before proceeding with the calibration.
3.
With the primary flight altimeter set to 1013,25mBar (29.92 in hg), increase the system pressure
supplied by the pitot-static test equipment until the primary flight altimeter indicates -280m +/-30m
(-918ft +/-100ft) as the minimum altitude.
4.
Compare the altitude shown on the display with the instant altitude and if required, adjust the
difference value by the „UP“ and „DOWN“ buttons for adjusting the instant altitude to the primary
flight altimeter. Press both buttons for storing the set value.
5.
Decrease the system pressure until the primary flight altimeter indicates 9500m +/- 30m
(3/- 100ft).
6.
Compare the altitude shown on the display with the instant altitude and if required, adjust the
difference value by the „UP“ and „DOWN“ buttons for adjusting the instant altitude to the primary
flight altimeter. Press both buttons for storing the set value.
7.
Repeat the steps 3 to 6 until the accuracy of 15m (+/- 50ft) is obtained for both increasing
and decreasing the pressure at both the maximum and minimum calibration altitude.
8.
Install a label that corresponds with the maximum altitude, to which the TL-3524 was calibrated,
on the instrument panel below the primary flight altimeter. The FAR 91.217 requires the correspondence
check to be performed. The AC43-6B provides guidance for acceptable methods to accomplish this.
5.7 Go to Calibration
A pitot-static system test equipment is required to perform the
following calibration procedures. The TL-3524 is calibrated in
the factory to the pressure datum according to the National
Bureau of Standards. When the TL-3524 has been installed in
the aircraft it must be calibrated to the primary flight altimeter
according to Advisory Circular 43-6A so as to comply with
FAR 91.36(b) and FAR 91.172.
ALTITUDE
encoder
CONTINUE
.............
.............
CALIBRATION
OK
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GO TO CALIBRATION
