MIL-PRF-23648F
MIL-STD-202. The following details shall apply:
a. Method of mounting: As specified in 4.8.7.1,
b. Test condition letter: A.
c. Points of measurement: Between the thermistor terminals connected together and the V-block.
4.8.7 Dielectric withstanding voltage (see 3.9).
4.8.7.1 Atmospheric pressure. Thermistors shall be tested in accordance with method 301 of MIL-
STD-202. The following details and exceptions shall apply:
a. Special preparations: Thermistors shall be clamped in the trough of a 90 degree metallic V-block
of such size that the body of the thermistor does not extend beyond the extremities of the V-block.
The thermistor leads shall be so positioned that the distance between them and any point of the V-
block is not less than the radius of the lead wire.
b. Nature of potential: An ac supply at commercial line frequency (not more than 100 cycles per
second) and waveform.
c. Duration of application of test voltage: Maximum voltage to be applied for 2 minutes 500 volts.
d. Rate of application of test voltage: 100 volts per second.
e. Points of application of test voltage: Between the thermistor terminals (connected together) and
the V-block.
f. Inspection after test: Thermistors shall be inspected for evidence of mechanical damage, arcing,
and breakdown.
4.8.7.2 At reduced barometric pressure. Following the tests specified in 4.8.7.1, thermistors shall be
a. Method of mounting: As specified in 4.8.7.1a.
b. Test condition letter: C.
c. Magnitude of test voltage: 200 volts.
d. Nature of potential: As specified in 4.8.7.1b.
e. Points of application of test voltage: As specified in 4.8.7.1f.
f. Duration of application of test voltage: 2 minutes.
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