MIL-DTL-28788C
STD-202. The following details and exceptions shall apply
a. Test condition A.
b. Applied force 4-1/2 pounds. For wire lead terminals, the applied force shall be 15
pounds.
c. Direction of force Force shall be applied along three mutually perpendicular axes of the
terminal, one direction of which shall be the one most likely to cause failure.
d. Time duration 1 minute.
e. Examination after test Switches shall be examined for evidence of breaking, loosening,
cracking, and other damage affecting the operation of the switch. (Bending of terminals
shall not be considered as damage to the switch.)
4.7.10 Connector torque (see 3.14). Switches shall be mounted by their normal mounting means on
a rigid metal fixture. A torque of 5 foot-pounds shall be applied to the electrical connector, in a plane
perpendicular to its central axis and in the direction which would tighten the mating part, and held for 1
minute. If the normal mounting means of the switch includes some type of strap or clamp, which would
permit rotation of the entire switch in its mounting device during this test, the switch shall be held
stationary by its pressure-port wrench flats, while the torque is applied. This test is intended as a
verification of connector mounting suitability, and is not meant to conform integrity of connector design or
construction.
4.7.11 Shock (see 3.15). Switches shall be tested as specified in 4.7.11.1, method I, and in addition,
when specified (see 3.1), switches shall also be tested as specified in 4.7.11.2, method II. The following
details and exceptions shall apply to method I and method II:
a. Mounting method and accessories Switches shall be mounted on a rigid metal panel by
their normal mounting means.
b. Electrical load conditions The electrical load shall consist of the monitor circuit only.
c. Half of the units shall be tested with the actuating means in one position and the other half of
the units shall be tested with the actuating means in an alternate position. Open circuits may
be connected in parallel and monitored for closing and closed circuits may be connected in
series and monitored for opening. In the event of indication of opening or closing of contacts
greater than that allowed, the test shall be modified by applying successive identical blows in
the same plane to monitor contacts, switch by switch, to determine if a switch is defective.
d. Measurements during shock Switch-contact stability shall be continuously monitored during
shock using method 310 of MIL-STD-202.
e. Measurement after test There shall be no evidence of broken, deformed, displaced, or
loose parts and the operating points shall be within the tolerances specified.
4.7.11.1 Method I (shock, specified pulse). Switches shall be tested in accordance with method 213
of MIL-STD-202. The following detail and exception shall apply:
a. Test condition I.
b. Contact stability 10 microseconds.
4.7.11.2 Method II (high-impact shock) (when specified). Switches shall be tested in accordance
with method 207 of MIL-STD-202. The following shall apply:
a. Contact stability 20 milliseconds.
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