MIL-PRF-5350G
used as the fill medium, the detected leak rate shall not exceed 0.10 micron cubic foot per
hour. Where 100% helium is used as the filling medium, the leak rate shall not exceed 1.0
micron cubic foot per hour.
4.6.7 Electrical zero. The (synchro) transmitter shall have R2 connected to S2, and 26Vac,
400Hz shall be applied to R1 and R2 for the following tests.
a. Rotate the rotor until the voltage between R1 and S3 is minimum.
b. Rotate the rotor counterclockwise approximately 30° until the voltage between S3
and S1 is minimum (null). This rotor position is electrical zero.
c. Rotate the rotor clockwise 30° from electrical zero. The voltage between S3 and
S2 shall increase and the voltage between S2 and S1 shall decrease during the rotation.
4.6.8 Electrical characteristics. The transmitter shall be tested for compliance with the
requirements for open secondary, power input, and secondary voltage.
4.6.9 Seasoning. The transmitter shall be subjected 10,000 deflection cycles (see 6.3.4).
One hour after the completion of this test, the transmitter shall be subjected to the scale
error test and shall be within the tolerances in the acquisition document.
4.6.10 Endurance. The transmitter shall be subjected 60,000 deflection cycles (see 6.3.4).
One hour after the completion of this test, the transmitter shall be subjected to the scale
error test at ambient temperature, and shall be within the tolerances in the acquisition
document.
4.6.11 Electromagnetic interference and compatibility. The transmitter shall be subjected
to electromagnetic interference and compatibility tests as specified in MIL-STD-461 and
MIL-STD-462. No "S" entries are defined for the transmitters covered by this specification
for use in MIL-STD-461.
4.6.11.1 RS103 (Army only). The RS103 test limit shall average 200 volts/meter for
10kHz through 40GHz.
4.6.12 Power supply. The transmitter shall be subjected to the scale error and friction error
tests at all combinations of 22, 24, 26, 28, and 30Vac and 320, 340, 360, 380, and 400Hz.
4.6.13 Damping. The transmitter shall drive the indicating standard from full scale
deflection to the level, and in the time limit specified in the acquisition document.
4.6.14 Overscale. The transmitter shall be operated at 150% of full scale for a period of 10
minutes. The transmitter shall then be subjected to the scale error test. The three secondary
leads of the synchro transmitter shall be connected to the corresponding leads of a synchro
indicator conforming to MIL-I-7057 (see figures 2 and 3).
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