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  TM 11-6625-524-14-4
VOLTAGE ACCURACY TEST
a.
Test, equipment.
(1) Oscillator
( 2 ) AC voltmeter
b. Test connections. As connected from paragraph 6-4.
c. Procedure.
(1) On the U. U. T., turn POWER switch to OFF. Adjust the meter's mechanical
zero to a meter reading of SET REF.
(2) Turn POWER switch to ON.
( 3 ) Disconnect oscillator from probe. Adjust the SET REF control (U.U.T.)
for a meter reading centered about the SET REF line.
( 4 ) Reconnect oscillator to probe.
( 5 ) Using the settings listed below, verify the U.U.T. meter indications
a r e within their min./max. voltages. V a r y the oscillator output to agree with the
a p p l i c a b l e AC voltmeter indication. When the U.U.T. is switched to the next range
position and for each subsequent range position. ad.iust the SET REF control prior
t o applying the oscillator voltage.
Voltmeter (U.U.T.)
A C voltmeter indication
M e t e r indication (volts)
RANGE switch
(volt
Min.
Max.
Max.
Min.
position (VOLTS)
0.000606
0.000582
0.001
0.000594
0.000618
0.00097
0.001
0.00099
0.00103
0.00101
0.000207
0.000291
0.001
0.000309
0.000303
0.00198
0.00206
0.00202
0.00194
0.003
0.003
0.00297
0.00201
0.00309
0.00303
0.003
0.00099
0.00103
0.00097
0.00101
0.00594
0.00618
0.00606
0.00582
0.01
0.01
0.0099
0.0103
0.0101
0.0097
0.00291
0.01
0.00297
0.00309
0.00303
0.0198
0.0194
0.03
0.0206
0.0202
0.0291
0.03
0.0297
0.0309
0.0303
0.0097
0.03
0.0099
0.0103
0.0101
0.0594
0.0582
0.1
0.0618
0.0606
0.097
0.1
0.099
0.103
0.101
0.027
0.029
0.1
0.0309
0.0303
0.194
0.3
0,198
0.202
0.206
0.291
0.297
0.3
0,309
0.303
0.097
0.3
0.099
0.103
0.101
0.594
0.582
1.0
0,618
0.606
0.97
1.0
0,99
1.01
1.03
0.291
0.297
0.303
1.0
0,309
2.02
3.0
1.98
2.06
1.94
3.0
2.91
2.97
3.09
3.03
3.0
0.99
1.01
0.97
1.03
(6) Disconnect equipment as shown in figure 6-1.
6-3/(6-4 blank)
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