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The SVL Scale Voltage to EU VI scales signal [V] from volts to the engineering units (EU) you select. You can use this polymorphic VI for single channel measurements, measurements in which the same channel information is applied to all the channels, and measurements in which each channel has its own channel information.
This VI is a function included with the NI Sound and Vibration Measurement Suite and NI Sound and Vibration Toolkit.
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SVL Scale Voltage to EU.vi
Scaling to EU
Typically, scaling a signal to the appropriate engineering unit (EU) occurs before any analysis is performed. Use the SVL Scale Voltage to EU VI to scale the signal to the appropriate EU.
All measurement VIs in the Sound and Vibration Toolkit expect input signals and return results with the appropriate units, such as time-domain signals in the correct EU, frequency spectra in decibels with the proper reference, phase information in degrees or radians, and so on. To handle units properly, the high-level VIs need the signal to be scaled to the appropriate EU.
NOTE: If you use any method outside of the Sound and Vibration Toolkit to apply scaling to a waveform, do not use the SVL Scale Voltage to EU VI. NI provides several tools and methods to apply scaling to a waveform. These include, but are not limited to, NI-DAQmx tasks or global channels created with Measurement & Automation Explorer (MAX), the DAQ Assistant, or the DAQmx Create Virtual Channel VI.
The Sound and Vibration Toolkit software maintains engineering units applied by NI-DAQmx through subsequent measurement analysis. In particular, the Sound and Vibration Toolkit handles data scaled to Pascals in NI-DAQmx Sound Pressure measurements and g in NI-DAQmx Acceleration measurements in the same manner as if you used the SVL Scale Voltage to EU VI to scale the data.
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