Agilent Technologies Switch/Measure manual Autozero

Features and Functions 2

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, 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 {OFFONCEON} [,(@<ch_list>)]

34980A User’s Guide 21