MIL-DTL-45068E
4.6.3 Performance.
4.6.3.1 Current draw. To determine conformance to 3.4.1, 28 ± 1V dc shall be applied to the
input connection of the dome lamp. The electrical circuit shall be completed by making electrical contact
with the body and door of the dome lamp. The dome lamp switch shall be rotated from the off to
blackout and white light positions.
4.6.3.2 Photometric. To determine conformance to 3.4.2, the dome light shall be operated in the
circuit specified in 4.6.3.1, and tested at a distance of 1.2 meters (m) from the filament as specified on
Drawing 7064671.
4.6.4 Environmental.
4.6.4.1 High temperature. To determine conformance to 3.5.1, the dome light shall be stored at
a temperature of 75 ± 3șC for a period of 24 hours and then operated continuously at this temperature for
4 hours with input voltage at 28 ± 1 V dc. Subsequently, the dome light shall be subjected to the tests
specified in 4.6.3.1 and 4.6.3.2 and examined for evidence of damage.
4.6.4.2 Low temperature. To determine conformance to 3.5.2, the dome light shall be stored at a
temperature of -55 ± 3șC for a period of 24 hours and then operated continuously at this temperature for 4
hours with input voltage at 28 ± 1V dc. Subsequently, the dome light shall be subjected to the tests
specified in 4.6.3.1 and 4.6.3.2 and examined for evidence of damage.
4.6.4.3 Shock. To determine conformance to 3.5.3, the dome light shall be mounted to simulate
actual installation in use and subjected to 12 shocks according to MIL-STD-202, method 213, test
condition G, except the peak value shall be 25 g, the nominal duration shall be 7 ms and the velocity
change shall be 0.8 meter per second (m/s). Subsequently, the dome light shall be subjected to tests
specified in 4.6.3.1 and 4.6.3.2 and examined for evidence of damage.
4.6.4.4 Vibration. To determine conformance to 3.5.4, the dome lights shall be mounted to
simulate actual installation in use using suitable mounting apparatus to assure that the mounting is free
from resonances over the test frequency range. The specimens shall be subjected to a simple harmonic
motion having an amplitude of 0.76 mm (1.5 mm maximum total excursion), the frequency being varied
uniformly between the approximate limits of 10 and 55 Hz. The entire frequency range from 10 to 55 to
10 Hz shall be traversed in approximately 1 minute. This motion shall be applied for a period of 2 hours
in each of three mutually perpendicular directions for a 6 hour total. Subsequently, the dome light shall
be subjected to the tests specified in 4.6.3.1 and 4.6.3.2 and examined for evidence of damage.
4.6.4.5 Corrosion. To determine conformance to 3.5.5, the dome light shall be subjected to the
salt spray (fog) specified in ASTM B117 for a period of 200 hours. Subsequently, the dome light shall be
subjected to the tests specified in 4.6.3.1 and 4.6.3.2.
4.6.4.6 Waterproofness. To determine conformance to 3.5.6, the dome light shall be subjected
to the test compatible to MIL-HDBK-1184., method 100, procedure 1. Subsequently, it shall be subjected
to the tests specified in 4.6.3.1 and 4.6.3.2.
4.6.4.7 Fungus. To determine conformance to 3.5.7, the dome light shall be subjected to the test
as specified in MIL-STD-810, method 508.3 for a period of 90 days. Subsequently, it shall be subjected
to tests specified in 4.6.3.1 and 4.6.3.2 and examined for evidence of microbial growth.
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