MIL-DTL-22992G
4.6.18 Water immersion (mated and unmated) (see 3.21). All connectors shall be completely wired
and assembled with appropriate accessories in accordance with the directions on the manufacturer's
instruction sheet. Cable and single conductors used shall be in accordance with 4.4.3. Connectors
assembled to multiconductor cables shall be tested in a chamber under pressure by submerging in
conductive water. Receptacles assembled to single conductor wires shall be mounted to the pressure
chamber by their normal mounting means with mounting flange gaskets and their terminal ends external
to the chamber containing the conductive water. The water conductivity shall be assured by the addition
of at least 5 percent sodium chloride by weight. The cable ends shall be sealed or extended outside the
chamber. The tests shall be performed after each of the following conditionings for the classes specified:
a. As received (all classes).
b. After a minimum of 4 hours at -55C +0/- 3C and return to room temperature (classes
C and J only).
c. After a minimum of 4 hours at 80C +3/- 0 and return to room temperature (all
classes).
4.6.18.1 Mated (all classes). The chamber shall be at a 1 standard atmosphere pressure differential
for a minimum of four hours. While the samples are still submerged and after the chamber has returned
to normal pressure, insulation resistance shall be measured as specified in 4.6.10.
4.6.18.2 Unmated (class C and J). The chamber shall be at a 1 standard atmosphere pressure
differential for a minimum of four hours. After the test samples have been removed from the water, salt
deposits may be removed by a gentle wash or dip in running water not warmer than 100F (37.8C).
Following this, all excess moisture shall be removed and the samples dried with compressed air for 5
minutes. The insulation resistance shall then be measured as specified in 4.6.10.
4.6.18.3 Unmated (class L). Connectors shall be tested as specified in 4.6.18.2, except the chamber
shall be at a pressure differential equivalent to 6 feet (1829 mm) of water for 4 hours minimum.
4.6.18.4 Mated with protective cover. The chamber shall be at a 1 standard atmosphere pressure
differential for a minimum of four hours. While the connector samples mated with their protective covers
are still submerged and after the chamber has returned to normal pressure, insulation resistance shall be
measured as specified in 4.6.10.
4.6.19 Heat rise (class L) (see 3.22). The test shall be performed at 77F ±9F (25C ±5C) in still
air, on mated pairs of connectors with the contacts assembled in the connectors. The contacts shall be
wired using suitable stranded copper wire of the same AWG rating as the contacts. All phase and neutral
contacts shall be connected in series. All jumpers are to be at least 2 feet (610 mm) long.
Thermocouples shall be used to monitor the temperature of the contact terminals. Rated dc current shall
be applied through the contacts for a minimum of 4 hours. The temperature of each terminal shall be
measured after the 4 hours of loading.
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