TB 9-1430-201-50
16. Ratio Accuracy
a. Performance Check
(1) Connect equipment as shown in figure 2.
(2) Position TI dials to 999(10).
(3) Adjust voltage divider (A3) to 999999X.
(4) Adjust output of voltage standard (A4) to 12 volts.
(5) Adjust lead compensator (A5) BALANCE 1 control for null on null detector (A1).
(6) Set TI and voltage divider controls to zero.
(7) Adjust lead compensator BALANCE 2 control for null on null detector.
(8) Repeat (2) through (7) above until no further adjustment is required.
(9) Set TI dials to 9000.
(10) Adjust voltage divider dials to obtain null on null detector. Voltage divider will
indicate between 899950 and 900050.
(11) Repeat technique of (9) and (10) above at TI dial settings listed in table 8.
Voltage divider will indicate within limits specified.
Table 8. Ratio Accuracy
Test instrument
Voltage divider indication
dial indication
Min
Max
899(10)
899950
900050
8888
888750
888850
7777
777650
777750
6666
666550
666650
5555
555450
555550
4444
444350
444450
3333
333250
333350
2222
222150
222250
1111
111050
111150
b. Adjustments. No adjustments can be made.
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