MIL-DTL-87104C
4.6.3.3.1 Test setup.
4.6.3.3.1.1 Apparatus. The test apparatus shall include the following:
a.
Connector clamp. The connector clamp shall provide for uniform distribution of the applied force about the
circumference of the connector component and shall not interfere with electrical test equipment connection.
b.
Cable grip fixture. The cable grip fixture shall uniformly grip and hold the cable component for a minimum
of 8 inches (203.2 mm) and shall not deform or indent the test sample. A means, such as wrench flats,
shall be provided to allow torque to be applied by a standard torque wrench, or other acceptable means.
c.
Fixed supports and cable guides. The fixed supports shall be rigid and shall not flex during the application
of force. The cable guides shall support the test sample, but not restrict rotation of the test sample.
4.6.3.3.1.2 Test conditions. Tests shall be conducted under room ambient conditions (see 4.3.1.1) and as
specified herein.
4.6.3.3.2 Procedure I (for flexible and semi-flexible assemblies).
a.
The assembly shall be subjected to examination of product, procedure II (see 4.6.1.2); VSWR, procedure II
(see 4.6.2.1.2); and RF insertion loss, procedures I and II (see 4.6.2.3.2 and 4.6.2.3.3). The input interface
shall be noted.
b.
The assembly shall be so mounted in the torque test fixture that the input interface will be subjected to the
torque force.
c.
The torque specified in the applicable detail specification shall be applied in a clockwise direction and
maintained for 10 seconds. The force shall be released and the torque shall be applied in a counter-
clockwise direction and maintained for 10 seconds. Torque applied in both the clockwise and
counterclockwise directions shall constitute one test cycle.
d.
The torque test shall consist of five test cycles as described in 4.6.3.3.2c. However, during the fifth cycle,
the force shall be maintained in each direction until the tests specified in 4.6.2.1.2, 4.6.2.3.2 and 4.6.2.3.3
have been accomplished.
e.
The force shall be released and the procedures specified in b. through d. above shall be repeated for the
other primary interfaces.
4.6.3.3.3 Procedure II (for rigid assemblies, adapters, panel receptacles, and connectors made of two or more
external parts).
a.
One end of the assembly (or connector) shall be held in a fixed position while the torque (specified in the
detail specification) is applied in line to the other end of the assembly (or connector) five consecutive times
in both a clockwise and a counterclockwise direction.
b.
The duration of maximum stress shall be for five seconds for each application of torque.
c.
At the completion of the torque test, the assembly shall be subjected to the tests specified in 4.6.1.2,
4.6.3.3.4 Accept-reject criteria (procedures I and II) (see 3.5.2.3). If the assembly fails at any time to meet the
accept-reject criteria established in 4.6.1.2.2, 4.6.2.1.2.5 ,4.6.2.3.2 and 4.6.2.3.3.1, the unit shall be considered to
have failed the torque test.
4.6.3.4 Flexing endurance test (see 3.5.2.4). Cable assemblies shall be subjected to the flexing endurance test to
determine their ability to withstand repeated flexing.
4.6.3.4.1 Test setup.
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