Creates channel(s) to measure voltage. Use this instance for custom sensors that require excitation. You can use the excitation to scale the measurement.
task in specifies the task to which to add the virtual channels this node creates. If you do not specify a task, NI-DAQmx creates a task for you, and adds the virtual channels this node creates to that task.
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 can also 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 node to convert the array to a list.
name to assign specifies a name to assign to the virtual channel this node 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 nodes, such as the source input of the DAQmx Trigger node.
If you create multiple virtual channels with one DAQmx Create Virtual Channel node, 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.
units specifies the units to use to return voltage measurements.
|From Custom Scale||
Units a custom scale specifies. If you select this value, you must wire a custom scale name to the custom scale name input.
error in describes error conditions that occur before this node runs. This input provides standard 'error in' functionality.
measurement range specifies the minimum and maximum values you expect to measure.
maximum value specifies in units the maximum value you expect to measure.
minimum value specifies in units the minimum value you expect to measure.
input terminal configuration specifies the input terminal configuration for the channel.
At run time, NI-DAQmx chooses the default terminal configuration for the channel.
Non-referenced single-ended mode.
Referenced single-ended mode.
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.
voltage excitation specifies the value and source of voltage excitation.
voltage excitation source specifies the source of excitation.
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.
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.
Supply no excitation to the channel.
voltage excitation value specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
bridge configuration specifies what type of Wheatstone bridge the sensor is.
Sensor is a full bridge. If you set use excitation for scaling to TRUE, NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.
Sensor is a half bridge. If you set use excitation for scaling to TRUE, NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.
Sensor is not a Wheatstone bridge.
Sensor is a quarter bridge. If you set use excitation for scaling to TRUE, NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.
task out is a reference to the task after this node 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.
use excitation for scaling specifies if NI-DAQmx divides the measurement by the excitation. You should typically set use excitation for scaling to TRUE for ratiometric transducers. If you set use excitation for scaling to TRUE, set maximum value and minimum value to reflect the scaling.
For example, if you expect to acquire a voltage between -5 and 5, and you use an excitation of 0.10 volts to scale the measurement, set minimum value to -50 and set maximum value to 50. If you set bridge configuration to No Bridge, use excitation for scaling has no effect on the measurement.
error out contains error information. If error in indicates that an error occurred before this node ran, error out contains the same error information. Otherwise, error out describes the error status that this node produces.
Where This Node Can Run:
Desktop OS: Windows
FPGA: LabVIEW NXG does not support FPGA devices