fuel pressure gauge (6). Two function selector valves are used to set up the equipment for
its five test functions; the VACUUM selector valve (16) for vacuum tests and the PRESSURE
selector valve (7) for pressure tests.
The control panel contains two VACUUM needle
valves (15) and two PRESSURE needle valves (10) which are used for fine or vernier con-
trol of vacuum and pressure. Also contained on the control panel are the power ON-OFF
switch (12) and power on indicator (11), the 4 AMP fuseholder (13) containing the power
fuse, and the SPARE fuseholder (14).
1-8. The rear panel contains four fittings; FUEL PRESS., MANF. PRESS., AIRSPEED,
and RATE OF CLIMB ALTIMETER. During operation, the instrument under test is con-
nected to the applicable fitting.
The rear panel also contains the POWER connector to
which a-c or d-c operating power is applied through an appropriate cable assembly,
1-9. At the top of the test set is a hinged panel (3) which contains a table which lists the
most current calibration corrections for the five master instruments on the test set
instru-
ment panel. When its captive fasteners
are released and the panel is raised, five small
OPEN-CLOSED selector valves become accessible.
These valves, designated RATE OF
CLIMB, ALTIMETER, AIR
SPEED, MANF. PRESS.,
and FUEL PRESS., control application
of vacuum or pressure to the appropriate instruments on the instrument panel and for the
external instruments to be tested.
1-10.
For access to interior components of test set, captive fasteners on the instrument
panel are released and the panel is swung upward.
With the panel open, the motor-pump
assembly, reservoir and electrical power supply components are easily visible. in ad-
dition, lower front panel and rear panel can be removed for access to the motor-pump
assembly, reservoir, filter
sumps in the vacuum and pressure lines., and bellows
1-3