TB 9-6625-1314-35
Figure 5. High gain auto range unit - top view.
22. Dc Volts
a. Performance Check
(1) Connect dc voltage standard (A7) for Level A and AN/GSM-259 calibration, or
electrical test set (A11) and ac/dc voltmeter (A3) for AN/GSM-256 and AN/TSM-55
calibration, to voltmeter (A14) INPUT terminals using two leads (B4).
(2) Set RANGE switch to 100 MV.
(3) Adjust output of dc voltage standard or electrical test set to obtain an indication
of 90.00 on voltmeter (A14). If dc voltage standard or ac/dc voltmeter does not indicate
between 89.900 and 90.100 mV, perform b below.
(4) Repeat technique of (2) and (3) above using settings and indications listed in
table 12. If dc voltage standard or ac/dc voltmeter does not indicate within limits specified,
and no adjustment was required in (3) above, perform b below.
Table 12 Range and Accuracy
Dc voltage standard or ac/dc
Test instrument
voltmeter indications (V dc)
RANGE
switch setting
Indication
Min
Max
1000 MV
900.0
0.89900
0.90100
1000 MV
700.0
0.69920
0.70080
1000 MV
500.0
0.49940
0.50060
1000 MV
300.0
0.29960
0.30040
1000 MV
100.0
0.09980
0.10020
10 V
9.000
8.9945
9.0055
100 V
90.00
89.945
90.055
1000 V
900.0
899.45
905.55
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