Creates channel(s) that use a Wheatstone bridge to measure torque. Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values. When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with minimum value and maximum value must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints.

Specify different values for units and physical units if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.


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Inputs/Outputs

  • cnclst.png bridge information —

    bridge information specifies information about the bridge configuration and measurement.

  • ci32.png bridge configuration —

    bridge configuration specifies the Wheatstone bridge configuration connected to the channel.

    Full Bridge (10182)

    Four active sensing elements in the bridge.

    Half Bridge (10187)

    Two active sensing elements in the bridge.

    Quarter Bridge (10270)

    One active sensing element in the bridge.

  • ci32.png voltage excitation source —

    voltage excitation source specifies the source of excitation.

    External (10167)

    Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use the voltage excitation value input to specify the amount of excitation.

    Internal (10200)

    Use the built-in excitation source of the device. If you select this value, you must use the voltage excitation value input to specify the amount of excitation.

    None (10230)

    Supply no excitation to the channel.

  • cdbl.png voltage excitation value —

    voltage excitation value specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.

  • cdbl.png nominal bridge resistance —

    nominal bridge resistance specifies in ohms the resistance of the bridge while not under load.

  • cdbl.png minimum value —

    minimum value specifies in units the minimum value you expect to measure.

  • cdbl.png maximum value —

    maximum value specifies in units the maximum value you expect to measure.

  • cgenclassrntag.png task in —

    task in specifies the task to which to add the virtual channels this VI creates. If you do not specify a task, NI-DAQmx creates a task for you and adds the virtual channels this VI creates to that task.

  • cdaqmxscale.png physical channels —

    physical channels specifies the names of the physical channels to use to create virtual channels. The DAQmx physical channel constant lists all physical channels on devices and modules installed in the system.

    You also can wire a string that contains a list or range of physical channels to this input. If you have an array of physical channels, use the DAQmx Flatten Channel String VI to convert the array to a list.

  • cstr.png name to assign —

    name to assign specifies a name to assign to the virtual channel this VI creates. If you do not wire a value to this input, NI-DAQmx uses the physical channel name as the virtual channel name.

    If you use this input to provide your own names for the virtual channels, you must use the names when you refer to these channels in other NI-DAQmx VIs and Property Nodes, such as the source input of the DAQmx Trigger VI.

    If you create multiple virtual channels with one DAQmx Create Virtual Channel VI, you can specify a comma-separated list of names to assign to the virtual channels. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.

  • ci32.png units —

    units specifies in which unit to return torque measurements from the channel.

    Nm (15881)

    Newton meters.

    oz-in (15882)

    Ounce-inches.

    lb-in (15883)

    Pound-inches.

    lb-ft (15884)

    Pound-feet.

    From Custom Scale (10065)

    Units a custom scale specifies. If you select this value, you must wire a custom scale name to the custom scale name input.

  • cerrcodeclst.png error in —

    error in describes error conditions that occur before this VI or function runs.

    The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. If an error occurs while this VI or function runs, the VI or function runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.

  • cdaqmxscale.png custom scale name —

    custom scale name specifies the name of a custom scale for the channel. If you want the channel to use a custom scale, wire the name of the custom scale to this input and set units to From Custom Scale.

  • ccclst.png scaling information —

    scaling information specifies how to scale electrical values from the sensor to physical units.

  • c1ddbl.png electrical values —

    electrical values is the array of electrical values that map to the values in physical values. Specify this value in the unit indicated by electrical units.

  • ci32.png electrical units —

    electrical units specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

    Volts/Volt (15896)

    Volts per volt.

    mVolts/Volt (15897)

    Millivolts per volt.

  • c1ddbl.png physical values —

    physical values is the array of physical values that map to the values in electrical values. Specify this value in the unit indicated by physical units.

  • ci32.png physical units —

    physical units specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

    Nm (15881)

    Newton meters.

    oz-in (15882)

    Ounce-inches.

    lb-in (15883)

    Pound-inches.

    lb-ft (15884)

    Pound-feet.

  • igenclassrntag.png task out —

    task out is a reference to the task after this VI runs. The task contains any newly created virtual channels. If you did not wire a value to task in, NI-DAQmx automatically creates the task this output refers to.

  • ierrcodeclst.png error out —

    error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, error out describes the error status that this VI or function produces.

    Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.