Table Of Contents

Configure Auto Zero (G Dataflow)

Version:
    Last Modified: September 16, 2017

    Configures the DMM to compensate for offset voltages on the input circuitry.

    When Auto Zero is enabled, the DMM internally disconnects the input and takes a zero reading before each measurement. It then subtracts the zero reading from the measurement.

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    session in

    Instrument identifier from previous NI-DMM nodes.

    Default: None

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    auto zero

    Setting for Auto Zero.

    The following table describes the valid values for this parameter.

    Value Setting Description
    -1 Auto NI-DMM chooses the Auto Zero setting based on the configured function and resolution.
    0 Off Disables Auto Zero.
    1 On Enables Auto Zero for each measurement.
    2 Once Enables Auto Zero before the next measurement. The Auto Zero value is stored and used in subsequent measurements until the device is reconfigured.

    Default: -1 (Auto)

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    session out

    Instrument identifier for subsequent NI-DMM nodes.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application

    Hardware Support:

    The PCI/PXI-4070, PXI-4071, PXI-4072, PXIe-4080, PXIe-4081, and PXIe-4082 have the following Auto Zero behavior:

    • For 6.5 digit or greater resolution DC measurements, NI-DMM enables Auto Zero for each measurement.
    • For all other DC measurement configurations, NI-DMM enables Auto Zero for one measurement and uses that Auto Zero value for subsequent measurements.
    • For AC measurements or waveform acquisitions, NI-DMM disables Auto Zero.

    The PCIe/PXI/PXIe/USB-4065 always uses Auto Zero for each measurement. For these DMMs, Auto Zero is an integral part of the signal measurement phase and adds no extra time to the overall measurement. These DMMs only support the Auto setting for the auto zero parameter.


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