CAUTION
Power source voltage must be within the limits specified in in paragraph 1-12.
4. If a-c power is used, connect a-c power cable (item 1, table 1-1) to POWER con-
nector on rear panel. Connect either single-phase adapter cable (item 3) or 3-phase
adapter cable (item 4) to free end of a-c power cable, then connect free end of adapter cable
to appropriate a-c power source.
5. If d-c power is used, connect d-c power cable (item 2) to POWER connector on
rear panel and, observing polarity, connect clips of d-c power cable to d-c power source.
2-5. OPERATING PROCEDURE.
2-6. To operate the test set, proceed as follows:
1. Raise hinged panel at top of test set and set all selector valves on recessed valve
panel to CLOSED
.
2.
Determine
which
aircraft
instrument
is
to
be
tested,
then
perform
either
step
a
o r a b e l o w
.
CAUTION
Vacuum valves must be open when operating pressure side: pressure valves
must be closed when operating vacuum side.
a. If pressure is to be used, open VACUUM UP and DOWN needle valves (15,
figure 1-1).
b. If vacuum is to be used, open PRESSURE UP and DOWN needle valves (10).
3. Set VACUUM or PRESSURE selector valve (7 or 16), as applicable, to setting
corresponding to that of instrument to be tested. Make sure that UP and DOWN needle
valves associated with the chosen selector valve are closed.
4. Using appropiate accessories (see table 1-1),. connect instrument to be tested to
FUEL PRESS., MANF. PRESS., AIRSPEED, or RATE OF CLIMB ALTIMETER fitting on
rear panel, as applicable. The RATE OF CLIMB ALTIMETER fitting is used for testing
both rate-of-climb indicator or altimeter.
2-2