TB 9-1430-201-50
(2) Position TI dials to 999(10) (999(100)) for model DP311.
(3) Adjust voltage divider (Ae) 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 dial to 9999 (99990 for model DP311).
(10) Adjust voltage divider dials to obtain null on null detector. Voltage divider will
indicate between 9998000 and 999999X for model DP211 or between 9998500 and 9999500
for model DP311.
(11) Repeat technique of (9) and (10) above at TI dial settings listed in table 6 for
model DP211 or table 7 for model DP311. Voltage divider will indicate within limits
specified.
Table 6. Ratio Accuracy, Model DP211
Test instrument
Voltage divider indication
dial setting
Min
Max
8888
8887000
8889000
7777
7776000
7778000
6666
6665000
6667000
5555
5554000
5556000
4444
4443000
4445000
3333
3332000
3334000
2222
2221000
2223000
1111
1110000
1112000
Table 7. Ratio Accuracy, Model DP311
Test instrument
Voltage divider indication
dial setting
Min
Max
88889
8888400
8889400
77777
7777200
7778200
66666
6666100
6667100
55555
5555000
5556000
44444
4443900
4444900
33333
3332800
3333800
22222
2221700
2222700
11111
1110600
1111600
9