MIl-PRF-8932/3A
4. Sensor balance. Following the range of adjustment test as specified in 4.6.5 of
MIL-PRF-8932, the following tests shall be performed in the order specified in 5.
5. Sensor matching gauge switch. The gauge switch pressure adjustment shall be set so that the
switch actuates when the applied pressure is of a value equal to four-fifths of the normal system
pressure specified in table I. The "V" port shall be open to the atmosphere.
a. A pressure shall be applied to the pressure port "P" and the switch operated as specified in
the procedure for operation of MIL-PRF-8932. The actuation and deactuation pressures shall be
recorded. The pressure difference shall be within the tolerances specified in table I.
b. The test specified in (a) shall be repeated except that a pressure equal to 15 pound per
square inch absolute shall be applied to the "V" port. The difference between the actuation and
deactuation pressure shall be recorded. The difference between them and the vent pressure shall
not differ from the values noted in (a) by more than the tolerances specified in table I.
c. The test specified in (b) shall be repeated, except that 14 inches of mercury absolute shall
be applied to the "V" port.
d. The test specified in (b) shall be repeated, except that 10 inches of mercury absolute shall
be applied to the "V + CPR" port.
e. The test specified in (b) shall be repeated, except that 5 inches of mercury absolute shall
be applied to the "V + CPR" port.
6. Intended use. The pressure switches covered by this specification are used in the production
and maintenance of F-18 military aircraft. These aircraft are exposed for prolonged periods to
extreme seagoing environments not encountered by commercial aircraft.
7. Superseding part numbers. The canceled part numbers and the corresponding superseding part
numbers are as shown in table II.
8. Changes from previous issue. Marginal notations are not used in this revision to identify
changes with respect to previous issue due to the extent of the changes.
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