03-16-2006 08:09 PM
Hi.
I'm using thermocouple type T. I set up board PXI6221 board with Labview 7.1.
I can read 0C temperature +/-1.5C in ice water bath. But when I take the same ice water bath at distance of 15m, the temperature is around 10C. Does cable length gives 10C difference?
The Lavbiew DAQ for thermocouple have CJC "constant" set at 25. When do I change this?
Should I set CJC as "constant" and fill in room temperature reading?
Thanks
03-17-2006 04:58 AM
03-17-2006 11:08 AM
03-17-2006 12:49 PM
03-17-2006 03:32 PM
08-14-2009 11:10 AM
Sorry to post here but haven't found out how to post new question -
I have a thermocouple system set up in rev 5 using a SCXI1102 with 1303 terminal blocks and 120 thermocouple type E. This runs fine.
I also have another PC with rev 8.5.1 that I am upgrading the rev 5.1 program. When I run this new PC I get three different levels of temp.
The only difference between the set ups is from the cable out of the SCXI box and the PC's. I am using the internal CJC temp.
The three different leves of temp are -
The first group reads temp fine, just as the old setup.
The second group is about 3°C higher
The thrid group is about 7°C higher.
Why the differnet temp levels??