MIL-PRF-23648F
204 of MIL-STD-202. The following details and exceptions shall apply:
a. Mounting: Thermistors shall be mounted on appropriate jig fixtures with their bodies restrained
from movement and their leads supported at a distance of .250 inch (6.35 mm) from the thermistor
body (see 6.7). These fixtures shall be constructed in a manner to insure that the points of the
thermistors mounting supports will have the same motion as the vibrating table. Test leads used
during this test shall be no larger than AWG size 22 stranded wire, so that the influence of the test
lead on the thermistor will be held to a minimum. The test lead length shall be no greater than is
absolutely necessary. A shielded cable, if required because of the field surrounding the vibration
table, shall be clamped to the thermistor mounting jig. In all cases, the thermistors shall be
mounted in relation to the test equipment in such a manner that the stress applied is in the
direction that is considered most detrimental.
b. Initial measurement: Zero power resistance shall be measured at 25°C as specified in 4.8.2.
c. Test condition letter: D.
d. Direction of motion: In each of two mutually perpendicular directions, one perpendicular and the
other parallel to the longitudinal axis of the thermistor.
e. Measurement during test: Each thermistor shall be monitored to determine electrical discontinuity
by a method which shall be sensitive enough to monitor or register (automatically) any electrical
discontinuity of 0.1 millisecond or greater duration.
f. Measurement after vibration: Zero power resistance shall be measured at 25°C as specified in
g. Inspection after test: Thermistors shall be inspected for evidence of mechanical and electrical
damage.
of MIL-STD-202. The following details and exceptions shall apply:
a. Special mounting means: Thermistor shall be mounted on appropriate jig fixtures with their bodies
restrained from movement and their leads supported at a distance of .250 inch (6.35 mm) from the
thermistor body (see 6.7). These fixtures shall be constructed in a manner to insure that the
points of the thermistor mounting supports will have the same motion as the shock table.
Thermistors shall be mounted in relation to the test equipment in such a manner that the stress
applied is in the direction which would be considered most detrimental. Test leads used during
this test shall be no larger than AWG size 22 stranded wire, so that the influence of the test lead
on the thermistor will be held to a minimum. The test lead length shall be no longer than
necessary.
b. Test condition letter: A.
c. Measurements before shock: Zero power resistance shall be measured at 25°C as specified in
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