MIL-PRF-83287G
voltage shall then be removed and the indicator reset. The indicator shall then be energized at
shall be repeated three more times. (Total of four times)
voltage shall then be removed and the indicator reset. The indicator shall then be energized at
procedure shall be repeated three more times. (Total of four times)
c. Transfer pulse length (see 3.7.1). Indicators shall be subjected to the specified pulses at the applicable
rated and operating voltages specified (see 3.1). An oscilloscope shall be used to monitor the pulse
length or a calibrated pulse generating device that is approved by the Qualifying Activity.
4.5.5 DC resistance (see 3.8). Indicators shall be tested in accordance with method 303 to MIL-STD-202. The
test voltage applied shall be the applicable rated voltage specified. Tests shall be at +125°C, ambient (+25°C) and -
65°C for group B and qualification. Tests shall be at 25°C for group A inspection.
4.5.6 Coil transient suppression (indicators with diodes only) (see 3.9). The voltage across the coil terminals shall
be measured when a low transient inducing switch external to the indicator is opened to remove rated voltage (see
3.1) from the coil. The recording system shall consist of a. or b.:
a. An oscilloscope and camera.
b. An equivalent high input impedance, high speed response recording instrument.
4.5.7 Thermal shock (see 3.10). Indicators shall be tested in accordance with method 107 of MIL-STD-202. The
following detail and exception shall apply:
a. Test condition: Unless otherwise specified (see 3.1), B-3 (for qualification and group B inspections) and B
(for group A inspection).
b. Measurements during cycling: During the final cycle, indicators shall be held for 30 minutes, minimum, at
the temperature extremes before the following applicable measurements are taken:
(1) Step 1: Dielectric withstanding voltage and operating voltage shall be measured at -65°C as specified
(2) Step 3: Insulation resistance, dielectric withstanding voltage, and operating voltage shall be measured
at +125°C (or at applicable temperature specified, see 3.1), as specified in 4.5.2, 4.5.3, and 4.5.4,
respectively.
4.5.8 Terminal strength (indicators with solder terminals only) (see 3.11). Indicators shall be tested in accordance
with method 211 of MIL-STD-202. The following details shall apply:
a. Test condition A, C, or E, as specified (see 3.1). Applied forces shall be as specified (see 3.1).
b. Inspection after test: The indicator shall transfer when rated voltage is applied.
4.5.9 Shock (specified pulse) (see 3.12). Indicators shall be tested in accordance with of MIL-STD-202 method
213. The following details shall apply:
a. Test condition I.
b. Inspection before and after test.
4.5.10 Vibration, high frequency (see 3.13). Indicators shall be tested in accordance with of MIL-STD-202 method
204. The following details and exception shall apply:
a. Mounting: Prior to test, one indicator shall be mounted on the test table and the operating voltage shall be
measured with the table coil de-energized. The measurement shall then be repeated with the table coil energized. If
the value measured with the table coil energized varies more than ±5 percent from that obtained with the table coil de-
energized, magnetic shielding shall be added so that the value measured with the table coil energized does not vary
more than ±5 percent from the value measured with the table coil de-energized.
b. Test condition D, or as specified (see 3.1).
c. Measurements (see 3.13).
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