MIL-DTL-55661C
4.6.3 Insulation resistance. This test shall be conducted in accordance with MIL-STD-202, method 302,
test condition B to determine compliance with 3.9.3.
4.7 Environmental tests.
4.7.1 Rotation. A torque shall be applied to the coupler of Connector UG-1870( )/U. The torque shall
be measured with a torque wrench to determine conformance to 3.10.1.
4.7.2 Salt spray. Four unmated connectors not assembled to cable shall be subjected to the salt spray
(corrosion) test in accordance with MIL-STD-202, method 101, condition B, and meet the requirements of
3.10.2.
4.7.3 Thermal shock. Four connectors each wired to 5 feet of Cable WD-37( )/U shall be tested in
accordance with MIL-STD-202, method 107, test condition A. The minimum time exposure to steps 1 and
3 shall be 1 hour after thermal equilibrium has been established. After completion of the fifth cycle, the
connector shall meet the requirements of 3.10.3.
4.7.4 Shock. Four coupled Connectors UG-1870( )/U, each wired to 5 feet of Cable WD-37( )/U shall
be tested in accordance with MIL-STD-202, method 205, test condition C, or method 202 at equivalent
acceleration to determine compliance with the requirements of 3.10.4.
4.7.5 Shock drop. Four unmated Connectors UG-1870( )/U, each wired to 5 feet of Cable WD-37( )/U
shall be dropped at random six (6) times with protective caps coupled to the connectors, and six (6) times
with protective caps dangling from a height of 10 feet onto 2 inch fir wood backed by concrete to
determine conformance to the requirements of 3.10.5. The connectors shall be visually examined and the
caps tightened after each drop.
4.7.6 Vibration. Four connectors each wired to 5 feet of Cable WD-37( )/U shall be tested in
accordance with MIL-STD-202, method 204, test condition A and meet the requirements of 3.10.6. Plugs
shall be mated and mounted to the vibration table. Receptacles shall be mounted using connector
components.
4.7.7 Pull. Connectors UG-1870( )/U shall be wired to 5 feet of Cable WD-37( )/U. A static load of 400
pounds shall be applied gradually to the assemblies mated, and approximately 2 feet of cable on each
assembly. The load shall be applied for a duration sufficient to complete the tests and meet the
requirements specified in 3.10.7.
4.7.8 Water immersion. The connectors wired to 5 feet of Cable WD-37( )/U shall be immersed to a
depth of 3 feet of water for 16 hours to determine compliance with the requirements of 3.10.8. Fifty
percent of the connectors shall be mated, twenty-five percent shall be with protective cover in place, and
twenty-five percent shall be without protective cover. When the sample size is not a multiple of four (4),
the odd connector(s) shall be tested with protective cover(s) in place. The receptacle shall be mounted to
a metal waterproof box, not less than 1/8 inch thick, using the mounting nut. The hole where the cable
enters the box shall be sealed.
4.7.9 Moisture resistance. Two connectors wired to 5 feet of Cable WD-37 ( )/U shall meet the
requirements of 3.10.9 after subjection to 10 cycles of moisture resistance in accordance with MIL-STD-
202, method 106, except that the vibration sub-cycle shall be omitted. Measurements shall be made
during the periods shown on the standard. The receptacle shall be mounted to a metal waterproof box,
not less than 1/8 inch thick, using the mounting nut. The hole where the cable enters the box shall be
sealed.
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