Rev #
23
Version 7.10
December
2019
9
IGC Barograph Recalibration Procedure
The mai
n display unit has an additional pressure sensor for altitude recording. To comply
with IGC procedures this sensor has no external pneumatic connection. To carry out t
he
barograph calibration procedure it is necessary to remove the instrument from the gl
ider
and place it in a vacuum chamber. The procedure is as follows:
•
Switch the instrument ON and wait some minutes (straight line on the barogram
beginning).
•
Set the re
cording interval to 1 second (see Chapter 5.1.2).
•
Place it in the chamber and carry out a short climb to about 100
m (to start the flight
recorder).
•
Bri
ng the chamber pressure to exactly 1013.2hPa.
•
Decrease the
p
ressure by 1000
m and
hold for about 30 seconds.
•
Continue the procedure to 9000
m.
•
Increase the pressure in 1000
m steps back to 1013.2hPa.
•
After reaching ground wait about 3 minutes and then switch the instrument off.
•
Leave the instrument off for at leas
t
5 minutes.
•
Download the last flight and print the barogram.
•
Restore the flight record
er settings.
The barogram will be the last flight in the logbook.
