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3.1 Offset Adjustment:
a. Referring to Fig. 7, connect both input lines together.
b. Connect output BNC connector to a DMM.
c. Put SW1 at 1/100
d. Adjust VR2 to make output voltage approach to zero as small as possible.
e. Put SW1 at 1/1000.
f. Adjust VR4 to make output voltage approach to zero as small as possible.
g. Repeat "c" to "g" steps until output voltage is always within ± 5 mV at either "e" or "g" step.
Fig. 7
4
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