Owning Palette: Waveform Measurements VIs
Requires: Full Development System
Calculates the DC and RMS values of an input waveform or array of waveforms. This VI is similar to the Basic Averaged DCRMS VI, but this VI gives more precise control over the individual DC and RMS calculations.
Wire data to the signal in input to determine the polymorphic instance to use or manually select the instance.
Use the pulldown menu to select an instance of this VI.
reset resets the history of your time signal. You typically use reset to reset the exponentially averaged measurement.  
signal in is the input waveform.  
averaging type is the type of averaging used during the measurement. If averaging type is exponential, this VI calculates the DC and RMS values using an exponentially weighted averaging measurement starting from the previous DC and RMS values.


averaging time defines dt of DC value waveform and RMS value waveform in seconds. The default is –1.00, which corresponds to average time = input block duration. For linear averaging, each output data point results from performing the averaging process for the time period specified by averaging time. For exponential averaging, each output data point results from exponential integration performed for the time period specified by averaging time using exp. time constant.  
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.  
averaging control contains the advanced parameters used to completely control the DC or RMS measurement.
 
data ready indicates the DC value waveform and RMS value waveform contain data. A value of FALSE means the waveforms do not contain data.  
DC value waveform indicates DC values of signal in computed over averaging time seconds and time stamped continuously from the last reset.  
RMS value waveform indicates RMS values of signal in computed over averaging time seconds and time stamped continuously from the last reset.  
error out contains error information. This output provides standard error out functionality.  
measurement info returns information about your measurement, mainly warnings for inconsistencies in your input signal.

It is assumed that the array of input waveforms is the result of a multichannel acquisition where each element in the array of waveforms is a distinct and separate channel of data.
reset resets the history of your time signal. You typically use reset to reset the exponentially averaged measurement.  
signals in is the array of input waveforms.  
averaging type is the type of averaging used during the measurement. If averaging type is exponential, this VI calculates the DC and RMS values using an exponentially weighted averaging measurement starting from the previous DC and RMS values.


averaging time defines dt of DC value waveform and RMS value waveform in seconds. The default is –1.00, which corresponds to average time = input block duration. For linear averaging, each output data point results from performing the averaging process for the time period specified by averaging time. For exponential averaging, each output data point results from exponential integration performed for the time period specified by averaging time using exp. time constant.  
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.  
averaging control contains the advanced parameters used to completely control the DC or RMS measurement.
 
data ready indicates the DC value waveform and RMS value waveform contain data. A value of FALSE means the waveforms do not contain data.  
DC value waveforms is an array of waveforms containing DC values.  
RMS value waveforms is an array of waveforms containing RMS values.  
error out contains error information. This output provides standard error out functionality.  
measurements info is an array that returns information about your measurement, mainly warnings for inconsistencies in your input signal.

This VI is designed to process a single channel or multiple channels continuously, typically from within a For Loop or a While Loop.
Note The Averaged DCRMS VI assumes that consecutive data blocks are continuous. If they are not, the VI returns a warning in measurement info, unless Ignore input start time is enabled. 
Refer to the Advanced DCRMS Measurement VI in the labview\examples\Signal Processing\Waveform Measurements directory for an example of using the Averaged DCRMS VI.