TB 9-6625-2227-24
b. Adjustments. No adjustments can be made.
Test instrument
RANGE
Calibrator
Indications
pushbutton settings
(mA)
output
(mA)
(mA)
Min
Max
1.9
2
1.892
1.907
19
20
18.92
19.07
190
200
189.2
190.77
1900
2000
1886
1913
a. Performance Check
(1) Press FUNCTION ~ V (ac volts) and 20 V RANGE pushbuttons.
and COM jacks. If TI does not indicate 0.00 V ac,
(2) Connect a short between the V
perform b (1) below.
(3) Remove the short and connect V
and COM jacks to calibrator.
(4) Set calibrator output to 19 V and frequency to 200 Hz. If TI does not indicate
between 18.91 and 19.09 V, perform b (2) below.
(5) Set calibrator frequency to 20 kHz.
If TI does not indicate between 18.91 and
19.09 V, perform b (3) below.
(6) Set calibrator frequency to 100 kHz. If TI does not indicate between 18.61 and
19.39 V, perform b (4) below.
(7) Set calibrator output to 1.9 V and frequency to 20 kHz.
(8) Press 2V RANGE pushbutton. If TI does not indicate between 1.891 and 1.909
V ac, perform b (5) below.
(9) Repeat technique of (4) through (8) above, using settings and indications listed
b. Adjustments
(1) Adjust AC ZERO ADJ R203 (fig. 1) for a TI indication of 0.00 V ac (R).
(2) Adjust AC GAIN ADJ R123 (fig. 1) for a TI indication of 19.00 V ac (R).
(3) Adjust 20 V HI FREQ ADJ R102 (fig. 1) for a TI indication of 19.00 V ac (R).
(4) Adjust 20 VAC ADJ C109 (fig. 1) for a TI indication of 19.00 V ac (R).
(5) Adjust 2 V HI FREQ ADJ R110 (fig. 1) for a TI indication of 1.900 V ac (R).