TB 9-6625-2135-24
Table 4. Resistance
Calibrator
Test instrument
ERROR display indication
pushbuttons
Output
(%)
1
200
190
.031
.025
2k
1.9
k
.025
20 k
19
k
k 2
200 k
190
.025
.025
2000 k
1.9
M
.110
20 M
10
M
Set calibrator 2 wire Comp on.
1
Set calibrator 2 wire Comp off before setting output.
2
b. Adjustments
(1) Press TI 2 k pushbutton and disconnect calibrator from TI.
and COM.
(2) Short TI V
ADJ R69
(3) Connect multimeter to junction of R78 and Q25 (fig. 1). Adjust 20 M
(fig. 1) for a multimeter indication of < 500 V (R).
and COM and disconnect multimeter.
(4) Remove short from TI V
and COM.
(5) Connect calibrator OUTPUT HI and LO to TI V
(6) Set calibrator for a 1 k output and 2 wire Comp on. Adjust 2 k ADJ R58
(fig. 1) for a TI indication equal to calibrator output display rounded to TI digits of
resolution (2 digits) (R).
(7) Press TI 20 M pushbutton.
(8) Set calibrator 2 wire Comp off and output to 10 M . Adjust 20 M ADJ R69
(fig. 1) for a TI indication equal to calibrator output display rounded to TI digits of
resolution (1 digit) (R).
(9) Press TI 2 k pushbutton.
(10) Repeat (6) through (9) above for best compromise.
10. Ac Voltage
a. Performance Check
and COM.
(1) Connect calibrator OUTPUT HI and LO to TI V
V pushbutton.
(2) Press TI
(3) Press TI pushbuttons and set calibrator output for settings listed in table 5. If TI
indications are not within limits specified, perform b below.