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|  MIL-G-19027D(OS)
4.5.2.2.1 Gyro Test Stand Assembled, NAVORD Drawing 877540 or equva-
lent, with 360 degrees rotation and the ability to set angles to the
nearest 1/4 degree.
4.5.2.2.2 Roll, pitch, and yaw table (Navy Stock Number 88-To-798-020-
000) 115 volts, 60 Hz, single phase, capable of being set zero to 15 de-
grees from horizontal with automatic reversing, six cycles per minute
with a capacity of 15 pounds.
4.5.2.3 Vacuum tube ac voltmeter, capable of reading 0.1, 0.3, 1, 3,
10, 30, 100, and 300 volts.
4.5.2.4 Matching synchro box. This box shall contain a synchro elec-
trically equivalent to Navy Synchro Control Transformer Mk 14, and shall
have provisions for rotating the synchro rotor so that the angle of rota-
tion can be read to the nearest 1/10 of one degree.
4.5.2.5 Rate turntable. Rate Gyro Table Assembled, NAVORD Drawing
877402 or equivalent, operated from 115 volts, 60 Hz single phase with
a rotating table capable of turning at speeds up to three rpm.
4.5.2.6 Megohmmeter, capable of measuring insulation resistance at 500
volts dc over the ranges of 0-20-20,000 megohms with an accuracy of 2 per-
cent.
4.5.2.7 One 10k plus or minus 10 percent, 2 watt potentiometer.
4.5.2.8 DC meter, capable of reading current up to 5 amps dc with
an accuracy of 3 percent.
4.5.2.9 AC ammeter capable of recording 400 Hz ac, rms current up to
5 amperes, with an accuracy of 3 percent.
4.5.2.10 Ohmmeter.
4.5.2.11 Current Fire Control Systems or their equivalent.
4.5.2.12 Oscilloscope, Tektronix Type 310A or equivalent.
4.5.2.13 Test leads and small tools as required.
4.5.3 Test procedure. The following tests constitute the quality con-
formance tests of the steering gyro. Unless otherwise specified, all pins
and connectors cited are shown on NAVORD Drawing 2413255.
4.5.301 Mount the steering gyro on the rate turntable (4.5.2.5) with the
spin axis parallel to the plane of the table.
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