TB 9-6625-2059-24
Table 17. Ac Voltage Accuracy.
TI multimeter
Calibrator indications
RANGE switch settings
(V Ac)
(V)
Min
Max
1
1 kHz
0.95
1.05
0.1
1 kHz
0.095
0.105
0.1
20 kHz
0.095
0.105
0.3
20 kHz
0.285
0.315
0.3
50 Hz
0.285
0.315
1
50 Hz
0.95
1.05
1
20 kHz
0.95
1.05
3
20 kHz
2.85
3.15
3
1 kHz
2.85
3.15
3
50 Hz
2.85
3.15
10
50 Hz
9.5
10.5
10
20 kHz
9.5
10.5
30
20 kHz
28.5
31.5
30
50 Hz
28.5
31.5
100
50 Hz
95
105
300
20 kHz
285
315
300
50 Hz
285
315
(17) Connect multimeter to TI multimeter INPUT. Set PWR-OFF-BATT switch
to OFF.
(18) Set TI multimeter FUNCTION switch to the first setting in table 18.
Multimeter will indicate within limits specified in first row of table 18.
(19) Repeat technique of (18) above for settings and indications listed in table 18.
Multimeter will indicate within limits specified in table 18.
Table 18. Ac Load Accuracy.
Multimeter
TI Multimeter
(Ω)
FUNCTION switch settings
Min
Max
600
504
616
150
135
165
8
7.2
8.8
3.2
2.88
3.52
(20) Disconnect multimeter from equipment setup. Set PWR-OFF-BAT switch to PWR.
(21) Connect INT MOD OUT to TI multimeter INPUT and audio analyzer
INPUT HIGH.
(22) Set TI multimeter FUNCTION switch to HI-Z and RANGE switch to SINAD.
(23) Adjust VAR control until audio analyzer voltmeter indicates 0.3 V.
(24) Adjust 1 kHz control until TI multimeter indicates 50 percent distortion (6 dB on
SINAD scale).
(25) Measure distortion at 4 kHz, and then adjust 1 kHz control until audio analyzer
indicates 50 percent distortion. If TI multimeter does not indicate between 4.5 and 7.5 dB
on SINAD scale, perform b (7) below. Adjust 1 kHz control fully ccw.
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