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Specify wiring configuration of RTD device


Use this property to specify the wiring configuration for measuring resistance.

When you create an RTD channel, the wiring configuration is unknown and the RTDConfiguration property displays Unknown. You must change this to one of the following valid configurations:

  • TwoWire

  • ThreeWire

  • FourWire


Specify Channel’s RTD Configuration

Specify an RTD channels wiring configuration.

Create a session and add an RTD channel to it.

s = daq.createSession('ni');
ch = addAnalogInputChannel(s,'cDAQ1Mod7',3, 'RTD');

Change the RTDConfiguration to ThreeWire.

ch.RTDConfiguration = 'ThreeWire'
ch = 

Data acquisition analog input RTD channel 'ai3' on device 'cDAQ1Mod7':

            Units: Celsius
          RTDType: Unknown
 RTDConfiguration: ThreeWire
               R0: 'Unknown'
ExcitationCurrent: 0.0005
 ExcitationSource: Internal
         Coupling: DC
   TerminalConfig: Differential
            Range: -200 to +660 Celsius
             Name: ''
               ID: 'ai3'
           Device: [1x1]
  MeasurementType: 'RTD'
    ADCTimingMode: HighResolution

See Also