How do I read the CJC value on TB-2627 connected to a 2527 switch. Using a PXI-4070

[Mark88]

I'm trying to use the CJC value on the 2627 TB. The samples and the switch convert voltage to temperature value all ask for this. How do I get the actual value. I've read the white page about using it with the 2527 switch, 2627 TB and 4070 DMM. It's also advertised that it has a CJC but I can not find anywhere how to actually get this reading. I'm probably missing something simple but I could use some help. Thanks, Mark

[Blizzard]

Hi Mark88,

To use obtain your CJC value from your TB-2627, you will have to convert the thermistor voltage from the CJC into temperature. A cold-junction sensor (thermistor) is located near the J13 connector on the
PCB of the NI TB-2627.

Additionally, you will want to follow the instructions for CJC output in the 2627 manual that I have linked below (page 11):

https://www.ni.com/docs/en-US/bundle/374148e/resource/374148e.pdf

Using the manual,  you can also do the calculation by hand. 

I hope this helps!

Regards,

Anna L