TB 9-6625-1957-24
Table 4. Ac Voltage Continued
Test instrument
Calibrator
output
RANGE/FUNCTION
indications
Adjustments
Amplitude
setting
Min
Max
450 V
40 Hz
500 AC VOLTS
444.4
V
455.6
V
450
V
1.0 kHz
500 AC VOLTS
446.7
V
453.4
V
180 V
20 Hz
200 AC VOLTS
177.82 V
182.18 V
180 V
1.0 kHz
200 AC VOLTS
178.72 V
181.28 V
180 V
20 kHz
200 AC VOLTS
177.82 V
182.18 V
18 V
20 Hz
20 AC VOLTS
17.782 V
18.218 V
18 V
1.0 kHz
20 AC VOLTS
17.872 V
18.128 V
18 V
20 kHz
20 AC VOLTS
17.782 V
18.218 V
1.8 V
20 Hz
2 AC VOLTS
1.7782 V
1.8218 V
1.8 V
1.0 kHz
2 AC VOLTS
1.7872 V
1.8128 V
1.8 V
20 kHz
2 AC VOLTS
1.7782 V
1.8218 V
(4) Reduce calibrator output to minimum.
b. Adjustments. No further adjustments can be made.
10. Dc Current Accuracy
a. Performance Check
(1) Set RANGE/FUNCTION switch to 2 DC mA. If TI does not indicate .0000,
perform 10 b below, before proceeding.
(2) Set calibrator for an output of 1.8 mA. TI will indicate within limits specified in
first row of table 5.
(3) Repeat technique of (1) and (2) above using the remaining calibrator outputs
Table 5. Dc Current
Test instrument
Calibrator
RANGE/FUNCTION
Indication limits
output
setting
Min
Max
1.8
mA
2 DC mA
1.7954 mA
1.8046 mA
18
mA
20 DC mA
17.954 mA
18.046 mA
180
mA
200 DC mA
179.54 mA
180.46 mA
1.8
A
2000 DC mA
1795.4
mA
1804.6
mA
(4) Reduce calibrator output to minimum.
b. Adjustments. Adjust R50 CURRENT ZERO (fig. 1) until TI indicates .0000 (R). No
further adjustments can be made.
11. Resistance
a. Performance Check
(1) Set RANGE/FUNCTION switch to 200 k OHMS.
(2) Set calibrator for a 190 k
nominal output.