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Page Title:
Durability and environmental tests |
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|  MIL-M-81392(AS)
considered a defective and a retest of another marker shall be made.
Defective are markers failing to meet the requirements of 3.3.1.4.
4.3.2.1 Jolt test. The marker shall be subjected to the jolt test
prescribed in Standard MIL-STD-350. The marker shall be assembled to the
test equipment using Test Fixture, SA Drawing 2522980, for mounting.
Defectives are markers failing to meet the requirements of 3.3.2.1.
4.3.2.2 Forty (40) foot drop test. The marker shall be subjected to
the forty foot drop test prescribed in Standard MIL-STD-352, except the
markers shall be dropped free-fall without guidance system or associate
equipment. Defective are markers failing to meet the requirements of
3.3.2.2.
4.3.2.3 Vibration test. The marker, in the armed position, shall be
subjected to a vibration test using the equipment specified in Standard
MIL-STD-353. The marker shall be assembled to the test equipment using
Test Fixture SA Drawing 2522934, for mounting. The marker shall be tested
at a single vertical amplitude of 0.030 0.002 inches throughout a frequency
range of 1100 to 3000 cycles per minute in increments of 100 cycles per
minute. The running time for each increment shall be 10 minutes. This
schedule shall be repeated with the marker in each of the following three
positions: (1) base end down, (2) base end up and (3) longitudinal axis
horizontal. Each marker shall receive a total of 10 hours vibration.
Defective are markers failing to meet the requirements of 3.3.2.3.
CAUTION:
The marker shall be returned to the "SAFE"
position when vibration test is completed.
4.3.2.4 Temperature and humidity test. The marker shall be subjected
to one 14 day temperature and humidity cycle prescribed in Standard MIL-STD-
354. Defectives are markers failing to meet the requirement of 3.3.2.4.
4.3.2.5 Grouped data acceptance. Data shall be grouped for static
functioning on the sample of 36 markers composed of the following groups:
Group (a)
Eight (8) markers from the
vibration test of 4.3.2.3,
Group (b)
Eight (8) markers from the
temperature and humidity
test of 4.3.2.4,
Group (c)
Twenty (20) markers from the
sealing test of 4.3.1.1.
Acceptance shall be as specified in Table I.
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