MIL-DTL-83538D
4.6.28 Contact walkout. Two contacts in each receptacle shall be tested. The contacts shall be
crimped to stranded steel cable of an appropriate size and installed in the connector. The unmated
connector shall be mounted in a test fixture as shown on figure 13. A 13.6 Newton-load (3 pounds) shall
be applied to the cable. One 360° rotation of the fixture with the connector mounted shall constitute one
cycle. The connector shall be subjected to 100 cycles at a rate of 10 to 20 cycles per minute
(see 3.31).
4.6.29 Installing and removal tool abuse. Qualifications only. One 8 gauge, one 12 gauge, one 16
gauge, and two 20 gauge contact cavities in each connector shall be subjected to each of the following
test. Different contact cavities shall be used for each test. Should a tool become damaged during any of
the testing, it shall be replaced. Failure of a tool shall not constitute a test failure. Tools shall be used in
accordance with MIL-I-81969/14 (see 3.32).
4.6.29.1 Removal tool rotation. The tool shall be inserted as if to remove a contact and a total of 13.6
Newtons (3 pounds) axial load shall be applied. With the force applied, the tool shall be rotated 180° and
then removed also removing the contact. The contact shall be reinserted. The steps shall be repeated
three times on each of the contacts selected.
4.6.30 High temperature exposure. See 3.33.
4.6.30.1 High temperature exposure with contact loading. Connectors with removable contacts shall
have one mating pair of 16 gauge contacts removed from an untested contact cavity and replaced with
contacts crimped or otherwise attached to steel cable or steel cored copper wire (copperweld, or
equivalent) of an appropriate size. The axial location of these contacts shall be measured for
conformance to the applicable dimensions of 3.1, with a load of approximately 8.9 Newtons (2 pounds)
applied to seat the contact back against the retention device. The connector shall then be mounted in a
fixture equivalent to that shown on figure 6. A weight equal to 50 percent of the axial load specified in
table XII for the applicable contact size shall be suspended freely from each steel wire. A current of 100
milliamperes maximum shall be applied to the test contacts and a suitable instrument shall be used to
monitor the circuit for discontinuities in excess of 1 microsecond. The mounted connector shall then be
exposed to 175°C for 1,000 hours minimum. After the connectors return to ambient temperature, they
shall be unmated and the contact locations remeasured with approximately 8.9 Newtons (2 pounds) axial
load applied to seat the contact back against the retention device. A suitable fixture shall apply the
4.6.30.2 High temperature exposure for connectors. Mated connectors shall be subjected to an
ambient temperature of 175°C +3°C, -0°C. The temperature shall be maintained for 1,000 hours. A
suitable fixture shall apply the holding force as specified in 3.4.7.2 to hold the connector pair together
(see 3.33.2).
4.6.31 Electrolytic erosion. Not applicable to the MIL-DTL-83538/11 buffer plug (see 3.34). The
launcher receptacle with buffer plug (not MIL-DTL-83538/11) mated shall be mounted in a vertical
position, pins facing up. A saltwater solution (5 percent salt by weight) shall be poured onto the pin
interface until the solution level just reaches the pin tips. The solution shall remain in the connector for a
minimum of 30 seconds and then poured out, lightly shaking excesses from the connector. The store
receptacle shall immediately be mated to the buffer plug with an applied holding force as specified in
3.4.7.2. One cell pattern, with all contacts adjacent to a central contact at a positive polarity and the
center contact at a negative polarity, shall be set up at a location giving the most uniform distribution of
contacts adjacent to the center contact. A potential of 60 volts dc shall be applied between the contacts
adjacent to the center contact. The contacts shall be energized for 40 hours. Following this, with the
voltage disconnected, the connectors shall be unmated and the pin contacts shall be examined using 3X
magnification for erosion to base metal.
39
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business