TB 9-6625-2135-35
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to TI VΩ and COM.
(2) Press TI function Ω pushbutton.
(3) Press TI range pushbuttons and set calibrator output for settings listed in
table 4. At
each output
setting, use calibrator output
adjustment controls to
set
calibrator control display Reading equal to TI indication. If calibrator control display
Error indications are not within limits specified, perform b below.
Calibrator
Test instrument
Error display indication
(%)
range pushbuttons
Output
Ω1
200
190
.031
kΩ
2k
1.9
.025
kΩ
20 k
19
.025
kΩ2
200 k
190
.025
MΩ
2000 k
1.9
.025
MΩ
20 M
10
.110
1Set
calibrator 2 wire Comp on.
2Set
calibrator 2 wire Comp off before setting output.
b. Adjustments
(1) Press TI 2 k range pushbutton and disconnect calibrator from TI.
(2) Short TI VΩ and COM.
(3) Connect multimeter to junction of R78 and Q25 (fig. 1). Adjust 20 MΩ ADJ R69
(fig. 1) for a multimeter
indication of <
500 V
(R).
(4) Remove short from TI VΩ and COM and disconnect multimeter.
(5) Connect calibrator OUTPUT HI and LO to TI VΩ and COM.
(6) Set calibrator for a 1 kΩ output and 2 wire Comp on. Adjust 2 kΩ 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 range pushbutton.
(8) Set calibrator 2 wire Comp off and output to 10 MΩ. Adjust 20 MΩ 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 range pushbutton.
(10) Repeat (6) through (9) above for best compromise.
a. Performance Check