Performance Tests and Calibration 4
34405A User’s and Service Guide 95
Gain Adjustments
The instrument calculates and stores gain corrections for
each input value. The gain constant is computed from the
calibration value entered for the calibration command and
from measurements made automatically during the
adjustment procedure.
Most measuring functions and ranges have gain adjustment
procedures. The 100 M
Ω range does not have gain calibration
procedures.
Adjustments for each function should be performed ONLY in
the order shown.
Gain Adjustment Considerations
• The zero adjustment procedure must have been recently
performed prior to beginning any gain adjustment
procedures.
• Be sure to allow the instrument to warm up and stabilize
for 2 hours before performing the adjustments.
• Consider the thermal effects as you are connecting test
leads to the calibrator and multimeter. It is recommended
to wait one minute before starting the calibration after
connecting the test leads.
Valid Gain Adjustment Input Values Gain adjustment can be
accomplished using the following input values.
CAUTION
Never turn off the instrument during a Gain Adjustment. This may
cause calibration memory for the present function to be lost.
34405A users guide.book Page 95 Saturday, September 2, 2006 3:38 PM
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