MIL-DTL-16377J(SH)
4.8.6.8 Lumen output for emergency luminaires. The following procedure shall be used to measure the lumen
output of emergency luminaires:
a.
Ensure battery is at full charge by applying power for a minimum of 24 hours.
b.
Remove external power source.
c.
Take initial lumen measurement per IES LM-79.
d.
Allow fixture to run on battery for 5 hours.
e.
Take lumen measurement per IES LM-79.
4.8.7 Shock test. The sample fixture, light, or part shall be subjected to the Type A, H.I. shock test in
accordance with MIL-S-901 for Grade A or B (see 3.5.12), Class I for fixtures and lights without shock mounts or
Class II for fixtures and lights with shock mounts, light weight equipment. Fixtures or lights shall be energized
during this test. Photographs shall be taken before the test of the test set-up and after the test of any failed element.
4.8.7.1 Mounting. Mounting of fixtures, lights, and parts on the shock machine shall simulate normal
shipboard installation. Mounting dimensions and hardware shall be as specified in the applicable specification
sheet. Fixtures, lights, and parts shall be securely mounted on the shock machine in accordance with the standard
methods shown on figure 17.
4.8.8 Vibration test. The sample fixture, light, or part shall be subjected to a vibration test conforming to
Type I vibration of MIL-STD-167-1 (see 3.5.13). Mounting for fixtures and lights shall simulate shipboard
installation. Fixtures or lights shall be energized during this test. Photographs shall be taken in accordance with
MIL-STD-167-1.
4.8.9 Noise test. When required (see 3.5.14), after the vibration and shock tests are conducted, the sample
fixture, light, or part shall be submitted to an airborne noise test as follows: Using a sound level meter that meets
the requirements of ANSI S1.4, determine the ambient noise level 12 inches from the fixture, light, or part under
test. The maximum acceptable ambient noise level is 40 dB. With the fixture, light, or part energized, determine the
maximum combined (ambient plus test piece) noise level at a distance of 12 inches from the test piece in all
directions. The combined noise shall fall within the shaded area of figure 20. The fixture, light, or part shall be
mounted as in actual service during this test. The "Shipboard Equipment Noise" section of MIL-STD-1474 may be
used as a guide. Calibration of sound level meter and recording of results shall be in accordance with the
"Shipboard Equipment Noise" section of MIL-STD-1474.
4.8.10 Salt spray test. The sample fixture, light, or part shall be subjected to a salt spray test in accordance with
Method 509.5 of MIL-STD-810, Test Condition A (see 3.5.15). The salt solution concentration shall be 20 percent.
4.8.11 Grounding circuit. The grounding circuit of the fixture, light, or part shall be tested by placing a current
of not greater than 5 nor less than 4 amperes through the grounding circuit for a period of not less than 1 minute.
This shall be done with the fixture, light, or part insulated from the ground conductor. The ground conductor of a
2-foot cable shall be connected to one end of the circuit, and the exposed metal portion of the fixture, light, or part
shall be connected by means of a test clip to the other end of the circuit. This circuit shall be placed in series with an
ammeter and some means of limiting the current to the specified value. The potential drop through the ground
connection when carrying between 4 and 5 amperes shall be measured by means of a voltmeter having a full scale
deflection of not more than 3 volts connected between a metal portion of the fixture, light, or part in electrical
contact with the grounding circuit and the ground conductor of the cable. This potential shall be not greater than
0.25 volt, and no arcing or burning in the grounding circuit shall be evident. The resistance of the grounding circuit
shall be measured with a milliohmmeter and the resistance of the circuit shall be not greater than 0.1 ohm.
4.8.12 Continuity of grounding. The resistance shall be measured with a milliohmmeter between protruding tip
of shockmount and any remote internal metallic structure of the housing assembly of the fixture, light, or part.
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