Keysight 34980A - Autozero

3 Features and Functions
128 Keysight 34980A Mainframe User’s Guide
Front Panel Operation: DMM or Channel (Configure) > INTEGRATION > TIME
First, select the measurement function on the active channel. You are
automatically guided to the next level of the menu where you can select a specific
integration time.
Remote Interface Operation: You can set the integration time using the SENSe
commands. For example, the following command specifies an aperture time of
2 ms for resistance measurements on channel 2001.
SENS:RES:APER 0.002,(@2001)
Autozero
When autozero is enabled (default), the instrument internally disconnects the
input signal following each measurement, and takes a zero reading. It then
subtracts the zero reading from the preceding reading. This prevents offset
voltages present on the instrument’s input circuitry from affecting measurement
accuracy.
When autozero is disabled, the instrument takes one zero reading and subtracts it
from all subsequent measurements. It takes a new zero reading each time you
change the function, range, or integration time.
– Applies to dc voltage, resistance, temperature, and dc current measurements
only.
– The autozero mode is set indirectly when you set the resolution and integration
time. Autozero is automatically turned off when you select an integration time
less than 1 PLC.
–The CONFigure and MEASure? commands automatically enable autozero.
– The autozero setting is stored in non-volatile memory, and does not change
when power has been off, after a Factory Reset (*RST command), or after an
Instrument Preset (SYSTem:PRESet command).
Front Panel Operation: DMM or Channel (Configure) > AUTO ZERO
Remote Interface Operation: The OFF and ONCE parameters have a similar
effect. Autozero OFF does not issue a new zero measurement. Autozero ONCE
issues an immediate zero measurement.
[SENSe:]<function>:ZERO:AUTO {OFF|ONCE|ON} [,(@<ch_list>)]