Auto Zero: Autozero provides the most accurate measurements, but requires additional time to perform
the zero measurement.With autozero enabled (On), the DMM internally measures the offset following
each measurement. It then subtracts that measurement from the preceding reading. This prevents offset
voltages present on the DMM’s input circuitry from affecting measurement accuracy. With autozero dis-
abled (Off), the DMM measures the offset once and subtracts the offset from all subsequent meas-
urements. The DMM takes a new offset measurement each time you change the function, range, or
integration time. ( There is no autozero setting for 4-wire measurements.)
Open Check: Disables or enables the thermocouple check feature to verify that your thermocouples are
properly connected for measurements. When enabled, the instrument measures the resistance after each
thermocouple measurement to ensure a proper connection. If an open connection is detected (greater
than 5kΩ on the 10kΩ range), the instrument reports an overload condition.
For more information about making temperature measurements refer to Keysight Application Note 290
Practical Temperature Measurements available at www.keysight.com.
Keysight Truevolt Series Operating and Service Guide
75
Features and Functions
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