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 calibration procedure.
Calibrations for each range and frequency should be performed in the order shown.
The ADC and zero calibration adjustment procedure must have been recently performed before beginning gain calibration. Flatness calibrations can be made using either the front or the rear input terminals. On the 34461A/65A/70A, make sure the Front/Rear switch matches the terminals in use.
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Never turn off the instrument during a gain or flatness calibration. This may cause calibration memory for the present function to be lost. |
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 calibration procedure.
Most measurement functions and ranges have gain calibration procedures, and calibration for each function should be performed in the order shown.