MIL-PRF-94G
4.7.3 Torque. (see 3.6).
4.7.3.1 Operating. The torque required to rotate the contact arm of the resistance element shall be determined
throughout the entire range of mechanical rotation by the torque wrench method or by any other method satisfactory
to the Government.
4.7.3.2 Stop. Resistors shall be mounted on a metal panel by their normal mounting means. The contact arm
shall then be rotated to each extreme limit of mechanical rotation and the specified torque (see 3.1) applied through
the operating shaft to the stops.
4.7.3.3 Locking. Resistors shall be mounted on a metal panel by their normal mounting means and the locking
device tightened with a torque wrench not greater than that specified (see 3.1).
4.7.4 Dielectric withstanding voltage (see 3.7).
4.7.4.1 Atmospheric pressure. Resistors shall be tested in accordance with method 301 of MIL-STD-202. The
following details and exceptions shall apply:
a.
Special preparation: Resistors shall be mounted on metal plates of sufficient size to extend beyond the
resistor extremities, and such a manner that measurements can be made between terminals tied together
and any other external metal parts.
b.
Magnitude of test voltage: 900 volts root mean square (rms) (for resistor styles RV6, 750 volts rms).
c.
Nature of potential: From alternating current (ac) supply at commercial line frequency and waveform.
d.
Points of application of test voltage: Between the resistor terminals tied together and all external metal
portions of the resistors and metal mounting plate.
e.
Examination after test: During the tests, the leakage current shall be monitored and the resistors examined
for evidence of arcing and breakdown. At the conclusion of the test, resistors shall be examined for
evidence of damage.
4.7.4.2 Barometric pressure. Resistors shall be tested in accordance with method 105 of MIL-STD-202. The
following details and exceptions shall apply:
a.
Method of mounting: As specified in 4.7.4.1a.
b.
Test condition B.
c.
Period of time at reduced pressure prior to application of potential: 1 minute.
Tests during subjection to reduced pressure: Voltage as specified (see 3.1) form an ac supply at
d.
commercial line frequency and waveform shall be applied for 1 minute.
e.
Points of application: As specified in 4.7.4.1d.
f.
Examination and measurement: As specified in 4.7.4.1e.
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