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Remote and Local Sensing

NI-DAQmx 18.6 Help

Edition Date: January 2019
Part Number: 370466AH-01
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If you use a cable of significant length, you might experience reduced accuracy in your measurement due to reduced voltage from wire resistance. You can adjust for this voltage drop using either remote sense or local sense.

Remote sense uses a separate connection to quantify the voltage drop. This accounts for the length of the cable in the original connection. To use remote sense, you must connect the RS+ and RS- terminals on the device to the primary winding terminals on the sensor.

Local sense measures the voltage drop internally at the excitation terminals. This method does not require the use of additional wires, but is not as accurate as remote sense.

On the PXIe-4340, you can set each channel to use either remote sense or local sense by using the AI.Excit.Source attribute/property.


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