MIL-DTL-55422B
d.
The vibration shall be conducted in each of three mutually perpendicular directions at the following
temperature conditions:
(1)
-65°C: 25 percent of the time.
(2)
+265°C: 25 percent of the time.
(3)
Normal temperature conditions: 50 percent of the time.
e.
The circuit shall be monitored for circuit continuity before, during, and after the vibration. A discontinuity
of contact or interruption of current flow for more than ten microseconds shall not be allowed.
4.5.2.3 Thermal shock. Clips shall be tested in accordance with MIL-STD-202, method 107, test condition C, and
shall meet the requirements of 3.8.
4.5.2.4 Shock (see 3.9). Clips shall be tested in accordance with method 202 of MIL-STD-202. The following
details and exceptions shall apply:
a.
Mounting of specimens. By their normal mounting means with the test plug fastened to the shock
machine and the clip coupled to the test plug.
Acceleration. 50 gravity units.
b.
Number of blows. Four
c.
d.
Direction of blows. One direction shall be in the axis of the test plug, away from the open end of the
clip, and the other direction shall be perpendicular to the axis of the test plug.
Measurements before and after shock. Clips shall be removed from the test plug parts and the
e.
withdrawal force recorded.
4.5.2.5 Retaining and release force for electrical clips (see 3.10). The clips shall be rigidly mounted so as to
permit coupling and uncoupling of the test plugs. The force to couple and uncouple the clips on the maximum size
test plug shall be within the limits specified (see 3.1). The clip shall be coupled and uncoupled 500 times. The
maximum size test plug shall have a diameter of no less than the tube cap diameter of +.015 inches (0.38 mm). A
minimum size test plug shall be inserted, and the gradually applied release force shall be measured. This force shall
be as specified by the retaining and release force of the specification sheets. The minimum size test plug shall have
a diameter of no more than the tube cap diameter, .007 inches (0.18 mm).
4.5.2.6 Dielectric withstanding voltage (see 3.11). Clips shall be tested in accordance with method 301 of
MIL-STD-202. The following details and exceptions shall apply:
a.
Special preparation or conditions:
(1)
The maximum relative humidity shall be 50 percent.
(2)
The center of contact of the clips shall be positioned in such a manner as to simulate actual
assembly conditions.
(3)
Precautions shall be taken to prevent air gap voltage breakdown.
7
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