MIL-DTL-55116D
4.9.6 Humidity. After being prepared for test in accordance with 4.2.2.3, 50 percent of the connectors
shall be mated and 50 percent shall be unmated. The connectors shall be tested in accordance with
method IV of ECA/EIA-364-31, except step 7a shall not be required. The connectors shall meet the
requirements of 3.7.6.
NOTE: The connectors may be placed in the humidity chamber in such a manner as to preclude
accumulation of moisture on the contact face.
4.9.7 Water immersion. Connector plugs U-228( )/U and U-229( )/U assembled to separate test
cables and each other, or U-229( )/U with connector receptacle U-183( )/U, shall be immersed in tap
water to a depth of 6 feet for a period of 48 hours in accordance with the following. The length of the
cable shall be such that the cable extends a few feet outside of the tank (see 3.7.7)
a. The receptacles tested shall be completely sealed against leakage or shall be mounted by their
normal means to the wall of the water tank so that the terminal end of the shell is external to the
tank and the water in the tank does not leak through the junction of the receptacle and the tank.
b. Mated connectors 50% of the connectors tested shall be mated. Insulation resistance of the
still mated units shall be measured at the end of the test and shall meet the requirement of 3.5.1.
c. Unmated connector 50% of the connectors tested shall remain unmated. Upon completion of
the test, all excess moisture shall then be removed and the connector dried by room temperature
compressed air for a period of 5 minutes. Insulation resistance shall be measured within ½ hour
after test is performed and shall meet the requirement of 3.7.2. They shall then be examined for
leakage into the body.
4.9.8 Mating test-connector. Test connectors necessary for the performance of tests requiring a
mating connector shall be the applicable mate in accordance with 1.2. They shall have passed the visual
and mechanical inspection of 4.10.
4.9.8.1 Test cables. For test purposes, plug connectors U-228( )/U, U-182( )/U and U-229( )/U will
be equipped with length of cable not less than 7 feet.
4.10 Visual and mechanical inspection. Connectors shall be examined for the defects listed on
table IX.
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