TM 55-4920-432-13&P
SECTION III - OPERATION UNDER USUAL CONDITIONS
2-6
OPERATING PROCEDURES
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a.
Connect appropriate power source to connector on rear panel of Tester with appropriate power
cable (and adaptor for single phase) per paragraph 2-2.
b.
Close all three instrument shut-off valves on top end of operator panel to “OFF” position.
c.
Select aircraft instrument to be tested.
CAUTION
Vacuum valves must be open when operating pressure side;
pressure valves must be open when operating vacuum side.
d.
Open "Control" and "Bleed" needle valves of opposite side of Tester selected.
e.
Set appropriate vacuum or pressure selector valve to instrument to be tested selection. Make sure
"Control" and "Bleed" needle valves to be used are both closed.
f.
open "shut-off" valve for appropriate aircraft instrument to be tested only.
g.
Connect instrument/aircraft to be tested to appropriate instrument "Pitot or Static" port on rear of
Tester.
NOTE
Altimeter and climb tests will be done using the "Static" port
whereas airspeed tests will be done using the "Pitot” port.
Appropriate hose(s) and fittings for these hook-ups are in the accessory storage compartment.
h.
Turn the power switch to “ON'. Indicator will light and motor/pump assembly will start.
CAUTION
When testing the rate-of-climb indicator do not exceed 5000
feet-per-minute up or down.
i.
Open "Control" needle valve to selector valve to test instrument selected. Use small turn to obtain
desired deflections and continue opening to obtain maximum deflection of both instrument on
tester panel and instrument under test.
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