[SENSe:]VOLTage[:DC]:ZERO:AUTO {OFF|ON|ONCE}
[SENSe:]VOLTage[:DC]:ZERO:AUTO?
Disables or enables the autozero mode for DC voltage and ratio measurements.
l
ON (default):
the DMM internally measures the offset following each measurement. It then subtracts
that measurement from the preceding reading. This prevents offset voltages present on the DMM’s
input circuitry from affecting measurement accuracy.
l
OFF:
the instrument uses the last measured zero measurement and subtracts it from each meas-
urement. It takes a new zero measurement each time you change the function, range or integration
time.
l
ONCE:
the instrument takes one zero measurement and sets autozero OFF. The zero measurement
taken is used for all subsequent measurements until the next change to the function, range or integ-
ration time. If the specified integration time is less than 1 PLC, the zero measurement is taken at 1 PLC
to optimize noise rejection. Subsequent measurements are taken at the specified fast (< 1 PLC) integ-
ration time.
Parameter
Typical Return
{OFF|ON|ONCE}
0 (OFF) or 1 (ON)
Configure DC voltage measurements and immediately autozero. Make and read two measurements:
CONF:VOLT:DC 1
VOLT:DC:ZERO:AUTO ONCE
SAMP:COUN 2
READ?
Typical Response: +1.0401,+1.0401
l
The autozero mode is set indirectly when you set the resolution and integration time using CONFig-
ure:VOLTage:DC, CONFigure:VOLTage:DC:RATio, MEASure:VOLTage:DC?, or
MEASure:VOLTage:DC:RATio?. Autozero is automatically turned OFF when you select an integration
time less than 1 PLC with these commands.
l
This parameter is set to its default value after a Factory Reset (
) or Instrument Preset
(
).
Keysight True
volt
Series Operating and Service Guide
385
SCPI Programming Reference
