Chapter 3. OPERATION
22 | ADTS 405 Mk2 Instruction Manual-English © 2015 General Electric Company – All rights reserved.
Leak measure mode (Timed average leak rate measurement)
Note: Compressing a gas generates heat. Gas heated or cooled in an enclosed
volume causes a pressure change. It is important, especially for leak testing, to
allow enough time for the heated gas to cool and the pressure to stabilize.
When setting the rate timer consider three factors:
1. The volume of the system to be tested (large volumes take longer to stabilize).
2. The pressure change (the higher the change the greater heat generated).
3. The ambient air temperature.
result
Display
Alt
WAIT
Alt
Alt
shows
rate timer
Static channel altitude 5000 ft,
measure leak:
5000
ft
Leak Measure
Set rate timer:
wait 05.00 miutes
test 01.00 minutes
RATE
TIMER
TIME
F1 00:00
F2 00:00
F3 05:00
00:30
01:00
01:00
ft
Leak Measure
00:30/TIMING
4996
4996
ft
Leak Measure
04:36/WAITING
Display shows alternating time
countdown and TIMING message
Display shows alternating wait time
countdown and WAITING message
ROC
RtCAS
-15.00T
-1.97T
ft/m
kts/m
Timed Rates
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