Gain and Flatness Adjustments
The instrument stores new flatness correction constants each time this procedure is followed. Flatness constants
adjust the DMM for AC Volts and AC current measurements across the usable input frequency band. The flatness
constant is computed from the calibration value entered for the calibration command and from measurements made
automatically during the adjustment procedure.
Adjustments for each range and frequency should be performed in the order shown.
Flatness Adjustment Considerations
The ADC and zero adjustment procedure must have been recently performed before beginning gain adjustment.
Flatness adjustments can be made using either the front or the rear input terminals. On the 34461A, make sure the
Front/Rear switch matches the terminals in use.
Never turn off the instrument during a gain or flatness adjustment. This may cause calibration memory
for the present function to be lost.
Agilent Truevolt Series DMM Operating and Service Guide 335
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