MIL-PRF-44259E
4.4 Methods of inspection.
4.4.1 Electromagnetic compatibility test. Each of the light assemblies from the sample
light set shall be tested in accordance with test methods CE 102 and RE 102 of MIL-STD- 461.
Failure of any light assembly to meet the limits specified in MIL-STD-461 (see 3.4.8) shall
constitute a test failure.
4.4.2 Cold starting test at 60 Hz. Each of the light assemblies from the sample light set
shall be cold soaked for 4 hours at a temperature of 0 °F. While maintaining a temperature of
0 °F, an electric power of 120 + 5 volts, 60 Hz shall be applied to each light assembly and the
light operated for a minimum of 1 hour. Failure of any light assembly to properly operate or
conform to the requirements of 3.5.6 shall constitute a test failure.
4.4.3 Cold starting test at 50 Hz. Each of the light assemblies from the sample light set
shall be cold soaked for 4 hours at a temperature of 0 °F. While maintaining a temperature of
0 °F, an electric power of 120 + 5 volts, 50 Hz shall be applied to each light assembly and the
light operated for a minimum of 1 hour. Failure of any light assembly to properly operate or
conform to the requirements of 3.5.6 shall constitute a test failure.
4.4.4 Illumination test. Each light assembly from the sample set shall be tested for
illumination when operating at 120 ± 5 volts, 60 Hz, and a maximum current of 0.7 amperes in
an atmosphere of 77 ± 5 °F. Failure to provide illumination as specified in 3.4.10 shall constitute
a test failure.
4.4.4.1 Filter test. Each filter from the sample light set shall be tested for light reduction
when the light assembly is operating under conditions specified in 4.4.4. Failure to provide the
conditions specified in 3.4.10.1 shall constitute a failure.
4.4.5 Current draw test. Each light assembly from the sample light set shall be tested for
current draw when operating at 120 ± 5 volts, 60 Hz. Any light assembly exceeding 0.7 amp, as
specified in 3.4.3, shall constitute a test failure. Repeat this test at 120 ± 5 volts and 50 Hz.
4.4.6 Thermal protector test. One ballast assembly (or a represented standard ballast
circuit) shall be tested for thermal protection. Place ballast, which operates one external lamp at
120 V AC, 60 Hz inside an oven or similar chamber. Place a thermocouple on the ballast case.
Soak the operating ballast for a minimum of 2 hours at 140 °F and record stabilized case
temperature and input current. Increase ambient temperature at 10 degree increments allowing
case to stabilize at each increment until 160 °F has been reached. Record case and ambient
temperatures and input current at each increment. Return chamber to 140 °F and observe normal
operation. Record input current. Failure to conform to the requirements of 3.4.5 shall constitute
a test failure.
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