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Multimeter Command Reference 83Chapter 3
:ZERO:AUTO
CALibrate:ZERO:AUTO <mode> enables or disables the autozero mode. Autozero
applies to dc voltage, dc current and 2-wire ohms measurements only. 4-wire ohms
and dc voltage ratio measurements automatically enable the autozero mode.
Parameters
Comments • You can use “0” for OFF and “1” for ON in the mode parameter.
• The ON parameter enables autozero. This is the default parameter which
causes the multimeter to internally disconnect the input signal following each
measurement and make a zero measurement. The zero reading is subtracted
from the input signal reading to prevent offset voltages present on the
multimeter’s input circuitry from affecting measurement accuracy.
• The OFF parameter disables autozero. In this mode the multimeter takes one
zero measurement and subtracts it from all subsequent input signal
measurements prior to a change in function, range or integration time. A new
zero measurement is made following a change in function, range or integration
time. This mode increases measurement speed because a zero measurement is
not made for each input signal measurement.
• Autozero ONCE issues an immediate zero measurement and can be used to get
an update on the zero measurement for a specific input signal measurement.
This helps to increase measurement speed since you update the zero reading
without making zero measurements for every measurement.
• *RST Condition: CALibrate:ZERO:AUTO ON (autozero enabled)
:ZERO:AUTO?
CALibrate:ZERO:AUTO? queries the autozero mode. Returns “0” (OFF or ONCE)
or “
1” ON.
Parameter Name Parameter Type Range of Values Default Units
<mode>
boolean OFF|0|ON|1|ONCE none