MIL-PRF-49318A(CR)
4.5.4 Adapters. Attach each of three adapters to the Assessor and check for light leakage
in accordance with the requirement of 3.5.4.
4.5.5 Power supply. Examine the battery for conformance with the requirement of 3.5.5.
The battery shall produce 9 volts dc.
4.5.6 Low battery indicator. A battery adapter shall be installed in the battery housing of
the Assessor under test, and its cable connected to a power supply. The voltage shall be set to
9 volts as read on the multimeter. The low battery indicator will not be illuminated. The voltage
shall then be reduced to 5.0. volts. Verify that the low battery indicator is illuminated.
4.5.7 Controls and switches. Conformance with the 3.5.7 requirement shall be
demonstrated wearing arctic mittens, as indicated.
4.5.8 Power on indicator LED. Conformance with the requirement of 3.5.8 shall be
demonstrated via manually operating the Assessor.
4.5.9 Optical instrument case. Demonstrate conformance with the requirement of 3.5.9 by
placing all items into the case, as indicated.
4.5.10 Input current. During the Low Battery Indicator test of 4.5.6, the input current will
be measured to verify that it does not exceed 5 milliamps.
4.5.11 Test modes. Ensure that the requirement of 3.5.11 has been met.
4.5.12 Light levels. Ensure that the requirement of 3.5.12 has been met.
4.5.13 Field of view. In order to test for the requirement of 3.5.13, the Assessor shall be
mounted in a holding fixture on a precision rotary table with a high intensity light source
illuminating the Assessor's test port. A dioptometer shall be used to measure the field of view.
The field should be no less than 30 degrees.
4.5.14 Reliability. The Assessor reliability requirement of 3.5.14 shall be demonstrated by
a MTBF compliance of 10,000 hours. For guidance, the provisions of Test Plan 30-1, figure 20,
of MIL-HDBK-781 are recommended. A test accept decision shall be based on demonstration of
1200 hours accumulated on each Assessor with no reliability failures. A test rejection decision
shall be based on occurrence of one chargeable failure in 1200 hours for any test set. If the
contractor performs the test for a longer period of time to allow one failure without rejection, the
test set reliability requirement will be demonstrated by a MTBF compliance of 10,000 hours
using the provisions of Test Plan 30-2, figure 20 of Handbook-781 as guidance. A Test accept
decision shall be based on demonstration of 1960 hours accumulated on each test set with no
more than one reliability failure.
4.5.15 Interchangeability. Ensure that all units, adapters and replaceable parts are
completely interchangeable by performing a parts exchange using no less than five(s)
disassembled Assessors. No modifications may be made to components to alleviate mating
problems during this test.
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