Using Autocal Function - NF DP060LM Instruction Manual

4. Advanced Operation
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.
However, in case the stand-by state of sequence mode (step0) effective only for AC-INT, ACDC-INT
or DC-INT and when the waveform is sine wave or DC. Autocal cannot be activated unless either AC
voltage or DC voltage setting is not 0 V for ACDC-INT. Also, Autocal is turned off once when you
change ACDC mode from AC mode of DC mode even in stand-by state. Turn ON it again when you
need.
For the specification of the Autocal function, see 11.18.
164 PROGRAMMABLE AC POWER SOURCE