Sapphire Instruments SI-9101 Calibration Procedure page 8

3.7 Accuracy Adjustment
a. Referring to Fig. 12, connect output BNC to a DMM.
b. Connect the red input line to the positive terminal of a DC voltage source (70 VDC) and the
black input line to the negative terminal.
c. Put SW1 at 1/10.
d. Adjust VR3 to make the output voltage equal to 6.915V.
Fig. 12
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