MIL-PRF-55339C
STD-202. The following details shall apply:
a. Test condition letter (see 3.1).
b. Measurements before and after cycling Not applicable.
MIL-STD-202. The following exceptions and conditions shall apply:
Mating connector Cabled connector in accordance with MIL-PRF-39012.
a.
b.
Initial measurements Not applicable.
c.
Loading voltage Not applicable.
d.
Number of cycles 10 continuous cycles except step 7b (vibration) shall be omitted.
e.
Final measurements After the final cycle and within 5 minutes after removal from high
humidity, insulation resistance shall be measured as specified in 4.5.8 .
4.5.19 Corona level (see 3.22). The test sample shall be connected to a mating connector and
arranged in a suitable test circuit such as indicated on figure 8. Components of the test circuit shall
be corona free to the extent that a discharge of five picocoulombs or less can be measured when the
60 Hz test potential is increased to the value specified at the reduced pressure specified (see 3.1).
The type of cable and length of cable used shall be as specified (see 3.1). No grease or similar
compounds shall be used in or on the test item. After the sample is purged of air, the 60 Hz voltage
shall be slowly increased until the detector, operated at a sensitivity of five picocoulombs, indicates a
sustained corona discharge. The voltage shall then be decreased until corona is at the five
picocoulombs level or less. The latter value is being the corona level of the connector under test.
The contractor may, at his own option, use a corona detector (which has been approved by the
Government) for performing the test in lieu of the test set up on figure 8.
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