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(5)
Press the RUN key (F1) and operate the hand-pump, continue until the switch
operates and immediately press (F2).
(6)
Carefully open the release valve and allow the airspeed to decrease until the
switch operates again and immediately press (F2). The display shows the
operating airspeeds and hysteresis.
(7)
Record the displayed operating data.
(8)
Allow the airspeed to decrease until it is below 80 kts.
(9)
Slowly open the manual let-down valve to return system to zero (ground level).
(10)
To perform another switch test, press RUN (F1).
(11)
To cancel switch test mode, press TASK.
Airspeed Leak Tests
Select TASK, AERO:
Select AIRSPEED LEAK TEST:
If necessary, SELECT AERO UNITS:
Method
(1)
Connect the instrument to the pitot system as shown in Figure C4. Ensure that
the static system is vented to atmosphere before starting the test.
(2)
Close the release valve and manual let-down valve and, using the hand-pump,
generate the required airspeed.
K0237 Issue No. 2
10
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