5. On recessed valve panel beneath calibration chart (3) at top of test set, set
selector valve which corresponds to the instrument connected in step 4 to OPEN.
6. Set power ON-OFF switch (12) to ON; power on indicator (11) will light and
pump will start.
C A U T I O
N
7.
When testing rate-of-climb indicators, do not exceed 5000 feet-per-minute
rate-of-climb ascending or decending.
Open UP needle valve associated with selector valve choosen in step 3. Use very
slight turn to prevent too rapid deflection of instrument. Continue opening UP needle
valve to obtain maximum deflection of both instrument ontest set panel and instrument
under test.
8. To return to zero deflection, close UP needle valve and slowly open DOWN needle
valve. Continuing opening DOWN needle valve until zero deflection is obtained.
9. To obtain true indications, operate UP and DOWN needle valves until indication
of applicable instrument on test set instrument panel corresponds to the corrected reading
shown on correction card at top of test set.
Refer to table 2-1 for test data pertaining to
aircraft instruments which can be checked using the test set.
10. At conclusion of test, open applicable DOWN needle valve until all instruments
indicate 0.
2-7. SHUTDOWN PROCEDURE.
2-8. To disconnect instrument under test and shut down test set, proceed as follows:
WARNING
Do not turn selector valves or disconnect hoses from test set unless all
instruments indicate zero.
2-3