MIL-DTL-6484D
4.3.3.4 High temperature. The light assembly shall be subjected to the high temperature tests, method 501.4,
procedure I, MIL-STD-810, except that the test period shall be for 24 hours. The lamp shall not be operated during this
test. At the conclusion of the test, the light assembly shall be checked for proper operation, dimensional stability, and
for crazing and other defects. Failure of any part of the assembly in this test shall be cause for rejection.
4.3.3.5 Salt fog. The light assembly shall be subjected to salt fog, method 509.4, MIL-STD-810 for 50 hours.
Immediately at the end of the test period the external surface of the light assembly shall be washed with distilled water
and air-dried. The light assembly shall be operated and shall meet the requirements of the operation test (see 4.4.1.2).
4.3.3.6 Sand and dust. The light assembly shall be subjected to the sand and dust tests, method 510.4, procedure
I, MIL-STD-810, except the test shall consist only of one test period of 6 hours at 25ºC. The assembly shall operate at
the conclusion of the test.
4.3.3.7 Temperature rise. The light assembly shall be operated for 4 hours in still air at maximum current and at
an ambient temperature of 25ºC. The temperature at any point on the exterior of the light assembly, except the focusing
device, shall not exceed 50ºC at any time during this test.
4.3.3.8 Humidity. The light assembly shall be subjected to the humidity tests, method 507.4 of MIL-STD-810.
The light assembly shall be thoroughly dried, with air blast if necessary, to assure that all water has been removed from
the light assembly before checking for proper operation.
4.3.3.9 Vibration. The light assembly shall be subjected to the Vibration Tests, method 204D, condition B, MIL-
STD-202. Any failure of the mount, lens housing, lamp housing, control rheostat, or failure of operation of the lamp
circuit shall be cause for rejection of the light assembly.
4.3.3.10 Dielectric. The light assembly with the lamp removed shall be subjected to a minimum of 750V rms ac
applied between terminals of the conductors for 2 minutes. Failure of the assembly in this test shall be cause for
rejection.
4.3.3.11 Rough handling. The light assembly shall be subjected to the tests specified in 4.3.3.11.1, 4.3.3.11.2 and
4.3.3.11.3. At the conclusion of each test, the light assembly shall be checked for proper operation. Breakage of any
part, or failure of the light assembly to operate properly at the completion of any of the tests for any reason other than
lamp failure, shall be cause for rejection. If lamp failure occurs, the light assembly shall be checked for proper
operation after a new lamp has been installed. The base referenced on MS17246 shall be removed when this test is
conducted.
4.3.3.11.1 Drop. The light assembly shall be dropped three times from a height of 2 feet into a concrete floor. It
shall be so dropped that it strikes the floor once in the front, once on the side, and once on the rear, in the three drops.
4.3.3.11.2 Impact. The light assembly shall be suspended by the end of the cord on a vertical wooden wall. It
shall then be raised to a 90-degree arc in order that the cord will be horizontal and will be perpendicular to the wall.
The light assembly shall be released from this position. This test shall be conducted three times.
4.3.3.11.3 Cord test. A force of 20 pounds shall be applied to the cord at the point it enters the light. The force
shall be directed so that it will tend to pull the cord from the light and shall be applied for 5 minutes. A weight of 5
pounds shall be suspended from the end of the coiled cord and permitted to remain there for 3 minutes and then
removed and the cord allowed to return and remain in retracted position for 1 minute. This procedure of suspending the
weight and removing it shall be repeated for 10 cycles. At the end of the 10th cycle the cord should return to less than
120 percent of its retracted length. Within 6 hours the coiled cord shall have returned to original length. A weight of 2
pounds shall then be suspended from the end of the coiled cord and the extended length shall be longer than 50 inches
and less than 72 inches.
4.4 Conformance inspection. The conformance inspection shall consist of individual tests.
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