TB 9-6625-2020-24
b. Adjustments. No adjustments can be made.
19. Ac Volts
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to TI HI and LOW.
(2) Press TI VOLTS AC TRUE RMS pushbutton and release all other
pushbuttons to out.
(3) Press TI range pushbuttons and set calibrator for settings listed in table 11. If
TI does not indicate within limits specified, perform b below.
Table 11. Ac Voltage
Test instrument
Calibrator
Test instrument
range
output settings
indications (V)
pushbuttons
Voltage
Min
Max
200 mV
180 mV
20 Hz
176.7
mV
183.3
mV
200 mV
180 mV
50 Hz
178.3
mV
181.7
mV
200 mV
180 mV
20 kHz
178.3
mV
181.7
mV
2V
1.8 V
20 Hz
1.767 V
1.833
V
2V
1.8 V
50 Hz
1.783 V
1.817
V
2V
1.8 V
20 kHz
1.783 V
1.817
V
20 V
18 V
20 Hz
17.67
V
18.33
V
20 V
18 V
50 Hz
17.83
V
18.17
V
20 V
18 V
20 kHz
17.83
V
18.17
V
200 V
180 V
20 Hz
176.7
V
183.3
V
200 V
180 V
50 Hz
178.3
V
181.7
V
200 V
180 V
20 kHz
178.3
V
181.7
V
500 VAC
500 V
50 Hz
491
V
509
V
500 VAC
500 V
20 kHz
491
V
509
V
b. Adjustments
(1) Set calibrator to STANDBY and disconnect from TI.
and LOW.
(2) Short TI VOLTS/
(3) Press TI 200 mV range pushbutton. Adjust R1204 (fig. 2) until TI indicates 00.0.
and LOW.
(4) Remove short from VOLTS/
and LOW.
(5) Connect calibrator OUTPUT HI and LO to TI VOLTS/
(6) Press TI 2 V range pushbutton.
(7) Set calibrator for a 1.8 V, 100 Hz output. Adjust R1108 (fig. 2) until TI indicates
1.800 V (R).
(8) Press TI 20 V range pushbutton.
(9) Set calibrator for a 18 V, 10 kHz output.
Adjust C1215 (fig. 2) until TI
indicates 18.00 V (R).