TB 9-6625-1965-35
8. Dc Voltage Accuracy and Stability
a. Performance Check
(1) Connect TI V-Ω input to calibrator OUTPUT HI and TI COMMON input to
calibrator OUTPUT LO.
(2) Set calibrator for an output amplitude of 190 mV dc. If TI does not indicate
within limits specified in first row of table 3, perform b below.
(3) Repeat technique of (2) above using settings listed in table 3 below. If TI does
not indicate within limits specified in table 3, perform b below.
Calibrator
Test instrument
Range
Indication limits (V dc)
Output
setting
Min
Max
190 mV
200 mV
189.7
190.3
1.9 V
2 V
1.897
1.903
19 V
20 V
18.97
19.03
190 V
200 V
189.7
190.3
1000 V
1000 V
998
1002
b. Adjustments
(1) Adjust calibrator for a 190 mV dc output. Adjust R23 200mV DC (fig. 1) until TI
indicates 190.0 mV dc. Reverse leads and adjust R15 OFFSET (fig. 1) until TI indicates -
190.0 mV dc(R).
(2) Adjust calibrator for a 1.9 V dc output. Adjust R25 2V DC (fig. 1) until TI
indicates 1.900 V dc (R).
a. Performance Check
(1) Press FUNCTION ACV and RANGE 20 pushbuttons.
(2) Set calibrator for an output amplitude of 19 V and an output frequency of
20 kHz. If TI does not indicate within limits specified in first row of table 4, perform b
below.
(3) Repeat technique of (1) and (2) above, for settings and indications listed in table 4.
TI will indicate within limits specified in table 4.