TM 55-1520-240-23-9
11-277
BENCH TEST AFCS COMPUTER (AVIM)
(Continued)
11-277
Do not operate tester with the
reservoir dry for more than 10
seconds as it will damage the
motor pump assembly. Operation
of the tester with excessive oil in
the vacuum or pressure sumps will
damage the instruments and valves.
Do not change position of pressure or
vacuum selector knobs when pump
motor is running, as serious damage
to instruments on tester can result.
When pressure or vacuum selector
knob is in a test position, the other
selector knob must be in the OFF
position to prevent damage to
instruments.
741.
Set PRESSURE knob (80) to 20-250 KNOTS.
742.
Set power switch (81) to ON.
743.
Slowly turn INCREASE knob (82)
counterclockwise until KNOTS indicator
(83) reads 40. Turn knob fully clockwise. Read
and record V2 AC/DC VOLTMETER (10) reading.
744.
CalculateV3. Subtract reading of step 737 from
reading of step 743 (V3 = V2 - V1). Result shall
be -0.104 to -0.120.
745.
Slowly turn INCREASE knob (82)
counterclockwise until KNOTS indicator
(83) reads 165. Turn knob fully clockwise. Read
and record V4 AC/DC VOLTMETER (10) reading.
746.
Calculate V5. Subtract reading of step 737 from
reading of step 745 (V5 = V4 - V1). Result shall
be -1.692 to -1.946.
747.
Slowly turn INCREASE knob (82)
counterclockwise until KNOTS indicator
(83) reads 145. Turn knob fully clockwise. Read
and record V6 AC/DC VOLTMETER (10) reading.
11-1135
