TB 9-6625-1866-50
(5) Repeat technique of (2) through (4) above for UUT switch settings and
indications listed in table 3. Dc voltage standard will indicate within limits specified.
Table 3. Dc VTVM
Unit under test
Dc voltage standard indication (V dc)
VOLTS RANGE switch
Meter indication
Min
Max
5
500
4.80
5.20
5
400
3.80
4.20
5
300
2.80
3.20
5
200
1.80
2.20
5
100
0.80
1.20
50
500
48.0
52.0
500
500
480.0
520.0
(6) Adjust dc voltage standard for 0 (zero) indication on UUT.
(7) Turn VOLTS RANGE switch to .5 and NULL, switch to .01 V.
(8) Adjust dc voltage standard for full-scale indication on UUT meter. Dc voltage
standard will indicate between 9.6 and 10.4 mv. If not, perform b(3) and (4) below.
(9) Reverse input polarity to UUT.
(10) Adjust dc voltage standard for full-scale indication on UUT meter. Dc voltage
standard will indicate between 9.6 and 10.4 mv.
(11) Reverse input polarity to UUT.
(12) Repeat technique of (7) through (11) above for UUT switch settings and
Table 4. Null Range
Unit under test
Dc voltage standard indication
NULL switch
Indication
Min
Max
.1
1
96 mv
104 mv
1
1
0.96 v
1.04 v
10
1
9.6 v
10.4 v
(13) Turn UUT NULL switch to VTVM.
b. Adjustments
(1) Adjust dc voltage standard for 0.500 volt
(2) Adjust P104 (fig. 1) until UUT indicates 500.
(3) Adjust dc voltage standard output to 10.00 mv.
(4) Adjust P103 (fig. 1) for full-scale indication on UUT.
6