TB 9-6625-1493-24
C5021
R503
R538(+)
R539
R403
C518(-)
R406
C4011
C4031
R120
C4051
R111
R410
R230
R122
C219(+)
R103
C215(-)
R231
1
REMOVE CAP FROM CAPACITOR TO GAIN ACCESS TO ADJUSTMENT.
Figure 1. Differential Voltmeter -adjustment locations.
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).
10. Differential Voltmeter Dc Voltage Accuracy and Stability (Reference Level)
a. Performance Check
(1) Utilizing the dc reference standard and standard resistor, characterize
multimeter to obtain 24 hour manufacturer specifications.
