MIL-PRF-23359H
inability to assemble the detector shall constitute failure of the high
temperature operation test.
4.7.1.3.2 Low temperature operation. Place the disassembled detector in
the temperature chamber and reduce the temperature to -32 ±2 °C. Maintain
this temperature for 3 hours, assemble, and remove the detector from the
chamber. Test in accordance with 4.5.1 using only the PMN-6 striker pin, 308
series (see figure 2), starting within 5 minutes and completing within 30
minutes after removal from the chamber. Return the detector to the chamber
and duplicate this test for six continuous cycles. After the sixth cycle,
test in accordance with 4.5.1 using all targets. These tests shall start
within 5 minutes after removal of the detector from the chamber. Failure to
operate in accordance with 4.5.1, or inability to assemble the detector shall
constitute failure of the low temperature operation test.
4.7.1.4 Humidity. The detector, out of its transport case, shall be
subjected to the following humidities along with their corresponding
temperatures. This constitutes one cycle. This cycle shall be repeated 5
continuous times and tested in accordance with 4.5.1 using all targets
specified herein after each complete cycle. After each cycle, the detector
shall be assembled within 5 minutes after removing it from the chamber and
tested in accordance with 4.5.1.a through 4.5.1.c, for all targets. Failure
to operate in accordance with 4.5.1, after each cycle shall constitute failure
this test.
Temperature - °C
Humidity - %
Time - Hours
95
26
6
85
30
2
74
35
8
85
30
2
95
26
6
4.7.2
Induced environments.
4.7.2.1 Vibration. The detector, out of its transport case, shall be
mounted to the vibration table. It shall be vibrated along each of three
orthogonal axes for a period of 1 hour, through a frequency range of 10 to 55
Hz, with a 0.25 cm double amplitude or maximum acceleration of 1.0g with a
sweep time of 15.05 minutes logarithmically. The sweep time includes an
ascending plus a descending sweep of the frequency range. After this test the
detector shall be assembled and tested in accordance with 4.5.1.a, b, and c,
for all targets. Any physical damage or failure of the detector to operate in
accordance with 4.5.1 shall constitute failure of this test.
4.7.2.2 Shock. The detecting set shall be loaded, complete with
accessories, in the transport case. A total of 26 drops, from a height of 122
cm, on all edges, corners, and faces shall be made onto plywood with a
concrete base from a quick release hook or drop tester. The case shall be so
oriented that, upon impact, a line from the struck corner or edge to the
center of gravity of the case and its contents is perpendicular to the impact
surface. After this test, the detector shall be assembled and tested in
accordance with 4.5.1.a, b, and c, for all targets. Evidence of damage to any
detector components or failure to operate in accordance with 4.5.1 shall
constitute failure of this test. Damage to the transport case shall be
allowed provided that it does not prohibit continuing its mission.
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