MIL-DTL-83538D
4.6.32
Ice and freezing rain. See 3.35.
4.6.32.1 Severe ice test. The unmated wired connectors with accessories attached, shall be
temperature stabilized at +5°C (41°F). The store receptacle connector shall be filled with a salt water
solution (2.5% salt by weight) and then the water shall be emptied out by inverting the connector
assembly. Immediately after, within 30 seconds, the connector shall be mated with its launcher
counterpart. A suitable fixture shall apply a holding force as specified in 3.4.7.2 to hold the connector pair
together. The chamber temperature shall be reduced to -54.0°C (-65.2°F) at a rate not less than
5°C/minute. The chamber temperature shall be increased at a rate of 5°C/minute until the chamber
temperature reaches 0°C. The test specimen shall be held at this temperature for 5 minutes. Upon
completion of the soak period, the test specimen shall be removed from the chamber and immediately
(within 30 seconds) subjected to unmating as provided in its user application. The force required to
separate the connector shall not exceed 334 Newtons (75 pounds).
4.6.32.2 Ice resistance test. Wired, mated connectors with an applied holding force of 271 Newtons
maximum, and with accessories attached shall be placed in a chamber and the temperature reduced and
stabilized such that the item is maintained at -54.0°C (-65.2°F) for 1 hour. After stabilization of the
chamber temperature, the test specimen shall be sprayed with water precooled to 1.7°C (35°F) for a
period of 5 minutes. The test specimen shall be located at a maximum 305 mm (12 inches) from the
spray nozzle. The entire test specimen shall remain in the chamber at -54.0°C (-65.2°F) for an additional
30 minutes. Upon completion of the 30 minute cold soak period, the test specimen shall be removed
from the chamber and immediately (within 2 minutes) subjected to unmating as provided in its user
application. The force required to separate the connector shall not exceed 334 Newtons (75 pounds). A
suitable fixture shall apply a holding force as specified in 3.4.7.2 to hold the connector pair together.
4.6.33 Sand and dust. Wired, mated connectors shall be subjected to the blowing dust and blowing
sand tests of MIL-STD-810, method 510. Blowing dust air velocity shall be 8.9 meters/second minimum.
The blowing sand air velocity shall be 29 meters/second minimum with a sand concentration of 2.2 ± 0.5
grams/cubic meter. Immediately following this exposure, the decoupling force and coupling force shall be
measured and shall not exceed the requirements specified in 3.8 by more than 25 percent. A suitable
fixture shall apply the holding force specified in 3.4.7.2 to hold the connector pair together (see 3.36).
4.6.34 Magnetic permeability. Connectors shall be tested as specified in test procedure EIA-364-54
(see 3.3.6).
4.6.35 Post test examination. The tested connectors and contacts shall be examined for compliance
with 3.42 and 3.46 to determine the effects of previous testing. Any evidence of cracking, loosening of
parts, carbon tracking, excess wear, or missing parts shall be recorded.
4.6.36 Launcher drive pin strength. Applies to MIL-DTL-83538/4 launcher receptacle only. The
Launcher receptacles shall be mounted in a fixture along the "Z" axis as shown on figure 3. A static force
of 2000 Newtons (450 pounds) shall be applied to the rear of the connector. Connectors shall meet the
requirements of 3.37 after the test.
4.6.37 Maximum Holding force. A mated set of launcher receptacle, buffer plugs and store receptacles
shall be placed in an appropriate holding device. A holding force of 578 Newtons (130 pounds) shall be
applied to the set. The requirement of 3.8.5 shall be met.
4.6.38 Lightening strike. The connector set shall be subjected to the lightening strike test requirements
as specified in 4.6.38.1 and 4.6.38.2 (see 3.38).
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