MIL-DTL-22931D
-55 ± 2
-55 ± 2
1
48
2
4 24
25 +10 -5
25 +10 5
80 ± 2
200 ± 5
3
48
4
4 - 24
25 +10 -5
25 +10 5
4.5.15 Thermal shock (when applicable, see 3.5.5). A piece of cable, 5 feet long shall be prepared by
carefully removing 1 inch of insulation from each end. (For purpose of this test, insulation is defined as all
layers of non-conducting material covering the electrical conductor, e.g., primary insulation, all tapes, and
braids of the jacket). The specimen shall be formed into a loose coil not less than 1 foot in diameter and
shall be laid on a screen for handling throughout the test (see 3.1). A razor blade, or equivalent, held
perpendicular to the axis of the specimen shall be used to cut the insulation for the removal operation.
The length of exposed conductor at each end of the specimen shall be measured to the nearest .125 inch
(3.18 mm) or as specified (see 3.1). The test cable shall be placed for 30 minutes in a preheated air-
circulating oven at the temperature specified (see 3.1). It shall then be removed from the oven and within
2 minutes placed in a chamber maintained at -55ºC ± 2ºC. The specimen shall be exposed to this
temperature for 30 minutes. It shall be removed and stored for a minimum of 30 minutes at room
temperature, 20º to 25ºC. At the conclusion of this cycle, the distance from the end of each layer of
insulation to the end of the conductor shall be measured to the nearest
.125 inch (3.18 mm) (see 3.1). This thermal shock and the measurements shall be repeated for an
additional three cycles (a total of four cycles). Cables shall be examined for flaring of any layer, and
checked for measurement variations.
4.5.16 Vibration, high frequency (when applicable, see 3.5.6). Cables shall be tested in accordance
with method 204 of MIL-STD-202. The following details shall apply:
a. Mounting of specimen Secure one end of an appropriate length of cable (supported by three
or less rigid clamps on each end) to a vibrating means while the other end is supported by a
rigidly stationary surface. A foot of free cable length shall exist between the supporting
surfaces. Each end shall describe a 180º nominal bend.
b. Test-condition letter B, except 10-55 Hz.
c. Measurements Short circuits shall be continually monitored throughout test with a detector
applied by a latching relay, conforming to MIL-R-39016/32.
Cables shall be examined for damage.
4.5.17 Shock (when applicable, see 3.5.7). Cables shall be tested in accordance with method 202 of
MIL-STD-202. The following details shall apply:
a. Mounting method and accessories Three or less cable straps to provide as rigid support as
possible.
b. Acceleration requirements 15g.
c. Number of blows 18 shocks, 3 in each of 3 mutually perpendicular directions.
d. Measurements after shock Cables shall be examined for discontinuity and damage.
5. PACKAGING
5.1 Packaging requirements. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD
in-house contractor personnel, these personnel need to contact the responsible packaging activity to
ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control
Point's packaging activities within the Military Service or Defense Agency, or within the military service
system commands. Packaging data retrieval is available from the managing Military Department's or
13
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business