Spec for cold junction sensor on CB-68T?

[JonathanC]

Hi,

What is the specification (i.e. manufacturer/pn) for the cold junction sensor (CH0) on CB-68T? It is labeled as RT1.

Jonathan

[Michael.Phillips]

Hi Jonathan,

Take a look at page 14 of this document. Let me know if you need additional specifications for the CJC sensor.

[JonathanC]

Michael, I downloaded that document yesterday. While that tells me the relationship between temperature and resistance, it doesn't tell me how to order a device that will behave the same as part RT1 on the CB-68T. What I am trying to do is to replace the CB-68T with a custom termination board. I would like the board to have the same interface as the CB-68T - thus my interest in learning the manufacturer and model number of part RT1. Jonathan

[Michael.Phillips]

Hi Jonathan,

That information is not made available to customers.

[AnalogKid2DigitalMan]

That's enough to get you hot under the collar, it's not like it is a proprietary part

Since NI won't assist maybe I can. based on the data in the PDF file link, it looks like a C curve thermistor. Here is one that may be close.

http://www.rhopointcomponents.com/product_detail.asp?mid=F&st1=Temperature+Sensors+and+Compensators&...

This google link may help out some more, I used the folling text to search on it:

"5000" + "thermistor" + "c curve"

http://www.google.com/search?hl=en&q=%225000%22+%2B+%22thermistor%22+%2B+%22c+curve%22

You may want to look at it to see if there is any text on it, search Google with that text.

Good Luck

AK2DM