Using Autocal Function - NF DP420LS Instruction Manual

4.13

Using Autocal Function

The Autocal (Automatic Calibration) function calculates the ratio (calibration factor) of the output
voltage measured value (effective value) versus the output voltage setting value when this function
is turned on, and multiplies the gain of the output amplifier by the calculated value, intending to
match the output voltage with the setting value. The calculated calibration factor is used as a fixed
value until the Autocal function is turned off. Therefore, even when the Autocal function is on, the
output voltage fluctuation may occur if the load is fluctuated. When the Autocal function is set to on,
the icon is displayed.
As the detected part of the output voltage calibrated by the Autocal function, either the sensing input
terminal (the Remote sensing function is on) or the output terminal (the Remote sensing function is
off) can be selected. Combining the Remote sensing function with the Autocal function, you can
compensate the voltage drop due to wiring to the load.
The Autocal function can be set to on in the AC-INT, AC-VCA, AC-SYNC, DC-INT, and DC-VCA
modes. However, for the AC mode, it can be set to on only when the waveform is a sine wave.
When the Autocal function is on, the waveform cannot be changed to other than a sine wave. When
the mode is changed to ACDC mode, when the signal source is changed to EXT or ADD, or when
the Sequence or Simulation function is selected, the Autocal function is forcibly set to off. When the
AGC function is on or Remote sensing function is FB, the Autocal function cannot be used.
For the specification of the Autocal function, see 11.17.
DP420LS/DP480LS

4.13 Using Autocal Function

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