Keysight 34420A - Null (Relative) Commands

4 Remote Interface Reference
160 Keysight 34420A User’s Guide
Null (Relative) Commands
The meter uses independant null values for channel 1 and channel 2 voltage
measurements, resistance measurements, and temperature measurements. See
page 90 in Chapter 3.
[SENSe:] | SENSe1: | SENSe2
VOLTage[:DC]:NULL[:STATe] {OFF | ON}
VOLTage[:DC]:NULL[:STATe]?
VOLTage[:DC]:NULL:VALue {<value> | MIN | MAX}
VOLTage[:DC]:NULL:VALue?
These commands enable or disable the null state for voltage measurements on
the selected input channel. Null must be enabled before the null value can be set.
The null value set must be within ±132 V on each input channel.
[SENSe:]
FRESistance | RESistance
:NULL[:STATe] {OFF | ON}
:NULL[:STATe]?
:NULL:VALue {<value> | MIN | MAX}
:NULL:VALue?
These commands enable or disable the null state for resistance measurements.
Null must be enabled before the null value can be set. The null value set must be
within ±1.2 MW. Null is common to both 2-wire and 4-wire resistance
measurements, that is, enabling null on 4-wire ohms measurements also enables
null on 2-wire ohms measurements.
[SENSe:]
TEMPerature
:NULL[:STATe] {OFF | ON}
:NULL[:STATe]?
:NULL:VALue {<value> | MIN | MAX}
:NULL:VALue?
These commands enable or disable the null state for temperature measurements.
Null must be enabled before the null value can be set. The null value set must be
in the range of -300 °C to 2000 °C. Null is common to all temperature
measurements, that is, enabling null for one probe type enables null for all probe
types.