MIL-DTL-83361B
TABLE III. Test tolerances.
Tolerance
Test
±PSI
Position error at midscale
1.0
Room temperature
1.0
Friction
High temperature
1.0
Low temperature
1.0
Pointer oscillation
1.0
Vibration
Pointer variation
1.0
Low temperature
1.0
Scale error
High temperature
1.0
3.4.2 Friction error. Friction error shall not exceed the tolerances specified in table III.
3.4.3 Position error. Position error shall not exceed the tolerances specified in table III.
3.4.4 Dielectric strength. The dielectric strength between each pin of the electrical
receptacle, except pins J and K and the case and between all external connections of each
mutually insulated circuit, shall be a minimum of 500 V alternating current (AC).
3.4.5 Case leakage. Case leakage shall not exceed 0.1 micron cubic foot per hour.
3.4.6 Fogging. There shall be no evidence of moisture or oil fogging of the coverglass
when the indicator is subjected to a temperature of 185 °F ± 9 °F (85 ºC ± 5 ºC) for a minimum
period of 2 hours and the face of the coverglass is then immediately immersed in an ice bath for
3 minutes.
3.4.7 Effect of lead length. When the lead length between the indicator and transmitter
is changed from 5 to 500 feet, the indicator shall not change more than 1 degree of arc. The
ground lead shall be kept short.
3.4.8 Magnetic effect. The compass deflection shall not exceed 1 degree of arc when the
indicator is positioned 5.5 inches from the compass and the horizontal magnetic field intensity at
the indicator is 0.17 oersted (Oe) to 0.19 Oe.
3.4.9 Unit torque gradient. The unit torque gradient shall be a minimum of 2,000 milligram-
millimeters (mg-mm) per angular degree of rotation.
3.4.10 Voltage and frequency variation. The indicator shall withstand voltage and
frequency variations from 22 V to 30 V and 320 Hz to 480 Hz without exceeding the scale error
10
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