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|  MIL-V-82443(OS)
4.4.4.9
High temperature operatin. Before testing, the valve,
installed in its test chamber in the ready condition, shall be condi-
tioned at a temperature of +140 F 5 F for a period of 1 hour. The
valve shall then be operated in accordance with and meet the require-
ments of 4.4.4.13 at an environmental temperature of +140 F 5 F.
The valve shall thereafter meet the requirements of 4.4.4.14 through
4.4.4.17.
4.4.4.10
Vibation, packed and packaged. The valve, packed and
packaged in accordance with Section 5, shall be vibrated in such a
manner as to determine the frequency producing maximum transmissibility
within the frequency range of 5 to 60 cps. The container shall be
fastened, in suitable fashion, to the table of a vibration testing device
producing an essentially sine wave motion. The maximum permissible
motion freedom shall be approximately 1/32 inch. The speciment shall then
be vibrated for 1 hour at the frequency producing maximum transmissibility
and at an input acceleration of 1 g. This test shall be applied to each
of the three principal orthogonal axes.
4.4.4.11
Shock, packed and packaged. The valve, packed and packaged
in accordance with Section 5, shall be subjected to free fall drop
tests. The valve in its container shall be dropped from a height of
36 inches. A total of four edgewise drops shall be made. Two drops,
each, shall be made on the bottom and top edges at points 180 degrees
apart. In addition, flat drops shall be made, one each, on the bottom
and on the side. The drops shall be made on an impact surface of essentially
non-yielding material such as stone or concrete. The complete series of
drops shall be performed under each of the following conditions: room
temperature, within 10 minutes after the container has been stabilized
at -45 F 5 F, and within 10 minutes after the container has been
stabilized at +140 F 5 F.
4.4.4.12
No-fire current. The valve (or sample squib) shall be sub-
jected to a current of 0.2 0.02 amperes maximum for a period of 5
minutes minimum, in accordance with Figure 2, and shall not fire.
Thereafter, the valve (or sample squib) shall be capable of meeting the
requirements of 4.4.4.13.
4.4.4.13
Firing current. The valve (or sample squib) shall fire when
subjected to a current of 2.0 0.2 amperes DC for 5 0.5 milliseconds
in accordance with Figure 2.
4.4.4.14
Visual inspection, after firing. After firing, the valve
case shall be inspected and shall show no evidence of permanent distortion.
14
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