How to read a USB9219 CJ Temperature

[CoffeeGoat]

 I'm currently working on a project that uses a couple of NI USB daqs: I have a 9219 for some temperature and current measurements (high accuracy) and I also have a USB6009 for some other (lower accuracy) temperature measurements.  I could just use a constant cold junction temperature for the 6009 but I was curious if I could somehow use the cold junction temperature from the 9219 (built in sensor) for the cold junction temperature of the 6009.  I couldn't easily find a way make this work, anybody have any ideas?  Thanks in advance charis kai eirene.  

[David_Pratt · Accepted solution]

Hey Charis,

As for taking the value from the CJC into the measurement of the 6009, you can't do this with external wiring.  What you'll need to do is use a DAQmx Channel Property Node and set it's terminal to  Analog Input>>Temperature>>Thermocouple>>CJC Value to pull the value used in the 9219 measurement.  Put this property node in-line with the 9219's task, take this value out and add it to your 6009's measurement value to get the actual temperature.  If you need more information, please let me know.

Thanks,