MIL-DTL-642E
4.6.7 Thermal shock (see 3.6.6). Plugs shall be tested in accordance with method 107 of MIL-STD-202.
The following details shall apply:
a. The plug shall be inserted into the applicable mating jack (see table IV) and shall remain
inserted in the jack throughout the test.
b. Measurements before and after test - None.
c. Test condition letter A.
4.6.8 Vibration, high frequency (see 3.6.7). Plugs shall be tested in accordance with EIA-364-28. The
following details and exceptions shall apply:
a.
Method of mounting: Plugs shall be mounted with their longitudinal axis in a horizontal plane.
b.
Test condition: I.
c.
Direction of motion: Along the axis of the plug, and then perpendicular to the axis of the plug.
d.
Measurements during vibration: Each plug shall be monitored for electrical continuity, using a
test current of 100 ±2 milliamperes, dc. Loss of continuity for a period longer than 10
microseconds constitutes a failure.
e. Measurements after vibration: Contact resistance shall be measured as specified in 4.6.2.
f. The vibration test shall be performed on plugs, both unmated (without the mating jack) and
mated (with the mating jack).
g. Mating jack: The applicable mating jack (see table IV) shall have a 3 foot ±3 inch length of
cord, of the type normally used with the jack, attached and hanging free. The plug shall be
inserted into the mating jack and shall remain inserted in the jack throughout the mated portion
of the test.
4.6.9 Shock (specified pulse) (see 3.6.8). Plugs shall be tested in accordance with method 213 of
MIL-STD-202. The following details shall apply:
a.
Test condition letter: H (75 G's).
b.
Six blows in three planes (total 18 blows).
c.
Mounting: Plugs shall be mounted on a rigid test plate and tested in the vertical position.
d.
The test shall then be repeated with the plugs mounted on a horizontal plate.
4.6.10 Salt spray (corrosion) (see 3.6.9). Plugs shall be tested in accordance with method 101 of
MIL-STD-202. The following details shall apply:
a. Test condition letter B (48 hrs.).
b. Measurements after test: Contact resistance shall be measured as specified in 4.6.4.
c. Unless otherwise specified, 5 percent salt solution.
4.6.11 Insertion and withdrawal forces (see 3.6.10). The specified mating jack conforming to the
applicable specification sheet (see table IV) shall be used. The maximum force required to insert and
withdraw the plug shall be measured as follows: The axis of the plug shall be aligned with the axis of the
jack bushing. A straight thrust shall then be applied gradually in a direction along the axis of the plug until
it is completely inserted into the jack; a straight pull shall then be applied gradually in a direction along the
axis of the plug until it is completely separated from the jack.
4.6.12 Strain relief (see 3.6.11). While terminated to the specified cable, a force of 50 pounds minimum
shall be applied in a longitudinal direction for a minimum of five minutes.
4.6.13 Longitudinal pull (see 3.6.12). The specified mating jack conforming to the applicable specification
sheet (see table IV) shall be used. The plug, when inserted in the jack and subjected to a longitudinal
pull of one pound less than the measured withdrawal force shall not render the jack inoperative or cause
an open contact (discontinuity) between the plug and jack.
4.6.14 Static load (see 3.6.13). A static load of 150 pounds minimum shall be applied to the plug at
approximately midpoint for one minute minimum. The plug shall be resting in a horizontal position on a
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