[SENSe:]VOLTage:{AC|DC}:NULL:VALue:AUTO {ON|1|OFF|0}
[SENSe:]VOLTage:{AC|DC}:NULL:VALue:AUTO?
Enables or disables automatic null value selection for AC voltage or DC voltage and ratio measurements.
This parameter is not shared between AC and DCmeasurements. The parameters are independent for AC
and DCmeasurements.
Parameter Typical Return
{ON|1|OFF|0}, default OFF 0(OFF)or1(ON)
Configure AC voltage measurements, using the null function to subtract 100 mV from the measurements. Make and
read two measurements:
CONF:VOLT:AC
VOLT:AC:NULL:STAT ON;VAL 100 mV
SAMP:COUN 2
READ?
Typical Response: +1.04530000E+00,+1.04570000E+00
Make a second set of measurements using automatic null value selection:
VOLT:AC:NULL:VAL:AUTO ON
READ?
Typical Response: +0.00000000E+00,+0.01420000E+00
l When automatic reference selection is ON, the first measurement made is used as the null value for all
subsequent measurements.[SENSe:]VOLTage:{AC|DC}:NULL:VALue will be set to this value. Automatic null
value selection will be disabled.
l When automatic null value selection is disabled (OFF), the null value is specified by this command:[SENSe:]
VOLTage:{AC|DC}:NULL:VALue.
l The instrument enables automatic null value selection when the null function is enabled ([SENSe:]VOLTage:
{AC|DC}:NULL:STATe ON).
l This parameter is set to its default value after a Factory Reset (*RST), Instrument Preset (SYSTem:PRESet), or
CONFigure function.
Agilent Truevolt Series DMM Operating and Service Guide 219
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