How to use BNC-2120 Thermocouple Input?

[TZAJ]

I am using a PCI-MIO-16XE-10 DAQ card with BNC-2120 BNC Conn Box. I need to use the Thermocouple Input from channel 1 and the temp ref. on Chan 0. I am using CVI for the programming. I can input the signal but it is very small - 0.000688 for instance. How do I convert this to an actual temperature? Thermocouple is type J.

[Annette Perez]

TZAJ,

If you go c:\Program Files\National Instruments\Measurement Studio\CVI\toolslib\daqUtil\convert.h, you will find two functions that will help you convert the Voltage into Temperature readings.

The two functions that you can use are: int Thermocouple_Convert() and int Thermocouple_Buf_Convert().

Good luck with your project!