TB 9-6625-1493-24
b. Adjustments
(1) Set NULL switch to TVM and voltage dials to 10.00000.
(2) Set NULL switch successively to each more sensitive position while adjusting
R120 (fig. 1) for a null indication on TI (R).
(3) Set NULL switch to TVM and voltage dials to 1.000000.
(4) Set NULL switch successively to each more sensitive position while adjusting
R122 (fig. 1) for a null indication on TI (R).
(5) Set NULL switch to TVM and voltage dials to 100.0000.
(6) Set NULL switch successively to each more sensitive position while adjusting
R103 (fig. 1) for a null indication on TI (R).
a. Performance Check
(1) Short COMMON to INPUT terminal.
(2) Position controls as listed in (a) through (d) below:
RANGE switch to 1.
(a)
(b)
Voltage dials to .000000.
NULL switch to .0001.
(c)
Polarity switch to + (positive).
(d)
(3) Adjust ZERO control for 0 indication on VOLTS meter.
(4) Readjust voltage dials for VOLTS meter indication of -1. If voltage dial
indication does not indicate between .000097 and .000103, perform b below.
(5) Repeat technique of (1) through (4) above, using values listed in table 6. Voltage
dials will indicate within limits specified.
b. Adjustments
(1) Set voltage dials to 0.000100.
(2) Adjust R231 (fig. 1) for VOLTS meter indication of -1 (R).
Test instrument
Voltage dial
NULL
RANGE
indications
switch settings
switch settings
Min
Max
10
1
0.97000
1.03000
1
0.1
0.097000
0.103000
1
0.01
0.009700
0.010300
1001
0.1
000.097
000.103
1001
0.01
00.0097
00.0103
Set all voltage dials to 0.
1