configuring pci4351

[Researcher Institute of Technology SA]

How can i measure temp. using pci4351 using the built in option for CJC.Im using the example for pci435xx, but when i select built-in CJC, the readings are NaN.  I tried to select Ch0 as in ohms in measurement mode, but still no reading. Im using type K-thermo.  Is there a fixed CJC for this type of thermocouple.If i use 25 deg, the readings are not actuarate.Help me

[Nick_F1]

Hi Researcher Institute of Technology SA,

Which example are you using?  Measure Thermocouple (with Accessory)?  Have you tried using the test panel in MAX to see if you can read a voltage off of the thermocouple?  I would try that first to make sure that the 4351 is working correctly.  Then after that is verified, check to make sure that the settings are correct in the example program. 

Is the temperature of the room that your PCI-4351 is in 25 degrees Celsius?  If it is not, then it is understandable that you are getting inaccurate readings.  How far off are the readings? 

Do you get any error messages when the value is returned as NaN?  One way to make sure is to turn on Highlight execution and see if anything is coming out of the error terminals while the program is running.

Please let me know what you find out.