MIL-DTL-81219C
5.5 Vdc for 5 Vdc indicators
At the completion of the test, the indicator shall meet the operational requirements of 4.6.2 (see
3.3.4)
4.6.7 Salt atmosphere. The indicator shall be tested in accordance with MIL-STD-202,
Method 101, Condition B. No voltage shall be applied during the test. At the completion of the
test, the indicator shall meet the operational requirements of 4.6.2 (see 3.3.5).
4.6.8 Vibration. The indicator shall be tested in accordance with MIL-STD-202, Method
204, Condition D. Application of the vibration shall be in each of the three principal planes.
The indicator shall be rigidly mounted in the horizontal position. The indicators shall be
energized during the test at their rated voltage. The AC indicators shall be energized at 60 Hz.
At the completion of the test, the indicator shall meet the operational requirements of 4.6.2 (see
3.3.6).
4.6.9 Shock. The indicator shall be tested in accordance with MIL-STD-202, Method 213,
Condition A, or as specified on the applicable MS sheet. At the completion of the test, the
indicator shall meet the operational requirements of 4.6.2 (see 3.3.7).
4.6.10 Life accuracy. Each indicator type shall be tested for life accuracy for 1000 ± 40
hours. The test shall be performed at the following conditions:
Temperature
Voltage
Elapsed Time
85°C (185°F)
Maximum Rated
200 ± 8 hours
85°C (185°F)
Minimum Rated
200 ± 8 hours
-20°C (-4°F)
Maximum Rated
200 ± 8 hours
-20°C (-4°F)
Minimum Rated
200 ± 8 hours
25°C (77°F)
Nominal Rated
200 ± 8 hours
The Maximum, minimum and nominal voltage ratings are shown on the applicable MS sheet. At
the end of the 1000 hours, the indicator shall be for accuracy in accordance with the
requirements of the applicable MS sheet. Accuracy is calculated as follows:
Accuracy (%) = (Measured Elapsed Time Actual Elapsed Time) X 100
Actual Elapsed Time
Failure of one or more indicators is considered failure of the entire sample. AC indicators shall
be energized at 60 Hz.
4.6.11 Power consumption. Indicators shall be checked for power consumption at the
rated voltage in accordance with the applicable MS sheet, using suitable measuring equipment
(see 3.3.10).
4.6.12 Low temperature Storage. The indicator shall be placed in a chamber maintained at
-80°C (-112°F) for 30 ± 2 minutes. The temperature shall then be raised to -20°C +5°C/-0°C (-4°F
+9°F/-0°F). This cycle shall be repeated for a total of 3 cycles. It shall then be brought to room
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