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1 Reverse the cable connections to the calibrator to create a -10 Vdc
voltage standard. You must physically reverse the cables.
DO NOT switch the output polarity of the calibrator.
2
Perform a –10V DC gain calibration. Press to enter the
calibration menu. Press again to begin the adjustment
procedure. Be sure to allow time for thermal offsets to stabilize
(usually about 1 minute).
3
Use the knob and to set the number in the display to the
difference of the calibrator output and the measured offset (from step 3)
and press . Using the previous example values, enter 10 µV
minus 10.001 volts or –10.000990 volts.
4 When the adjustment finishes, verify that new readings fall
within ± 30 µV of the calibrator output minus the offset.
Chapter 4 Calibration Procedures
–10 Vdc Adjustment Procedure (Optional)
86
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