TB 9-4920-469-24
(19)Set TI SYS RES full CW. Depress and hold TI PTS pushbutton. TI shall read
greater than 25.00 Ω. Release pushbutton.
(20)Connect multimeter, set to 200 V dc, to TI SW PCB TPB and AGND.
(21)Set TI FUNCTION switch to INS MEAS, RANGE switch to 200K and PWR
switch to ON.
(22)Depress and hold TI PTM pushbutton; multimeter shall indicate between
43 and 48 V dc. Release pushbutton.
(23)Disconnect multimeter from TI.
(24)Short TI leads. Depress and hold TI PTM pushbutton.
(25) Adjust TI P17 to achieve TI display of approximately 000.0. Release pushbutton.
(26)Connect TI leads to resistance standard NO.1, set to 195.00 kΩ.
(27)Depress and hold TI PTM pushbutton.
(28)Adjust TI P21 to achieve TI display of approximately 195.0. Release pushbutton.
(29)Short TI leads and repeat steps (24) through (28) until no further improvement
can be made in the zero and full scale adjustments.
(30)Repeat steps (24) through (29) above for remaining ranges and indications listed
Table 9. Insulation Accuracy Adjustments (Model TT1200).
Resistance
TI Range (Ω)
Standard
Adjustment
(Ω)
000.0 1
2M
P16
1.950 M
P20
1
20 M
00.00
P15
19.50 M
P19
000.0 1
200 M
P14
195.0 M
P18
Short TI leads.
1
12