TB 9-6625-2257-24
(2) Connect calibrator HI and LO OUTPUT to TI HI and LO INPUT.
(3) Set calibrator output to 1 V at 1 kHz. If TI does not indicate between 0.9975 and
1.0025, perform b (1) through (5) below.
(4) Set calibrator output to 1 V at 15 kHz. If TI does not indicate between 0.9940
and 1.0060, perform b (6) below.
(5) Repeat technique of (4) above using settings, indications, and adjustments listed
in table 4.
Table 4. Ac Voltage Accuracy
Calibrator settings
Test instrument indications
RANGE
pushbutton
Adjustments
settings
Min
Max
V
b(7)
1
10 kHz
1
0.9975
1.0025
1
20 kHz
1
0.9940
1.0060
---
1
30 Hz
1
0.9940
1.0060
---
10
30 Hz
10
9.940
10.060
...
10
1 kHz
10
9.975
10.025
---
10
10 kHz
10
9.975
10.025
---
b(8)
10
20 kHz
10
9.940
10.060
100
20 kHz
100
99.40
100.60
---
100
10 kHz
100
99.75
100.25
---
100
1 kHz
100
99.75
100.25
---
100
30 Hz
100
99.40
100.60
---
1000
30 Hz
1000
994.0
1006.0
---
1000
1 kHz
1000
997.5
1002.5
---
1000
10 kHz
1000
997.5
1002.5
---
1000
20 kHz
1000
994.0
1006.0
---
b. Adjustments
(1) Disconnect TI from calibrator.
(2) Press VDC and RANGE 1000 pushbuttons. If TI does not indicate +000.0,
connect multimeter between TI TP1 and LO INPUT. Adjust ZERO (R175) for a 0 V dc 10
V indication on multimeter. Disconnect multimeter.
(3) Press VAC pushbutton. TI will indicate between 000.0 and 000.3
(4) Connect calibrator OUTPUT HI and LO to TI HI and LO INPUT.
(5) Set calibrator output to 1 V at 1 kHz and press TI RANGE 1 pushbutton.
Adjust ACV CAL (R134) for a TI indication of 1.0000 (R).
(6) Set calibrator output to 1 V at 10 kHz.
(7) Adjust 1 V HF ADJ (C14) for a TI indication between 0.9993 and 1.0008 (R).
(8) Set calibrator output to 10 V at 20 kHz.
(9) Adjust 10 V HF ADJ (C15) for a TI indication of 10.000 (R).
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