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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 temperature, dc voltage, 2-wire ohms, and dc current
measurements only. Autozero is enabled when you select 4-wire ohms
measurements.
• 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.
• You can set autozero from the remote interface only; you cannot
directly set autozero from the front panel.
• 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).
• 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.
ZERO:AUTO {OFF|ONCE|ON}[,(
@<ch_list>)]
4
Chapter 4 Features and Functions
General Measurement Configuration
105