Friday 9 September 2016

Measurement of temperature using RTD and Thermocouple and perform the data logging using LabVIEW and NI modules 9217 & 9211 respectively.

Objective:

Measurement of temperature using RTD and Thermocouple and perform the data logging using LabVIEW and NI modules 9211 & 9217 respectively. Design the front panel as shown in the fig.



Apparatus required:
  • 3 wire RTD
  • K type thermocouple
  • NI 9211 TC module
  • NI 9217 RTD module
  • NI USB chassis 9178 with USB cable and power adapter.



Procedure:
  • Connect the chassis 9178 to the PC with USB cable and give power to it through power adapter. Don’t switch ON the power.
  • Connect the RTD and Thermocouple with their respective module as per the diagram shown below: 





  • Connect the modules in the chassis slot and switch ON the power to the chassis.
  • Open the LabVIEW software and create a new VI. Bring the ‘DAQ Asst’ VI into the block diagram by right clicking over it go to Express------>Inputs-------->DAQ Asst.
  • Select the proper DAQ NI 9211-----> Acquire Signals----->Analog------->Temperature--->TC0 (for Thermocouple) click on finish.
  • A configuration window will be opened, select type of thermocouple as ‘K’ and click on OK button.
  • Now the LabVIEW will configure the DAQ and Build it.
  • Take another DAQ Asst for RTD in the VI. This time select the DAQ as NI9217 and Temperature as RTD.
  • In the configuration window select ’3 wire RTD’ and click on OK button.
  • The output data from both the DAQ are in degree Celsius temperature directly.
  • Log temperature from both the DAQ in the following format:


Date
Time
RTD Temperature
Thermocouple Temperature
Status











Note: For the status give a high and low threshold limit of the temperature, within that limit the temperature is ‘NORMAL’ otherwise ‘ABNORMAL’

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