Johan Svensson Posted November 10, 2006 Report Share Posted November 10, 2006 Hi, I use a PCI-6221 DAQ, SC-2345 signal cond. box and one SCC-TC02 and one standard type K thermocouple. The result after each maesurment is -1908625864800603,25 ?? Without cjc-channel reading. Use a constant value. Notice that the program I use is the example (Acq thermocouple sample.vi ) in labview supplied by NI. I know that there is a thermistor inside SCC-TC02 for CJC, but at first I want to get it to return sensible values. This should be simple, but is not, I have been testing all I can think of, so please look at the pic and tell if anyting is wrong for my system... Anyone out there who had similar problems? When I use max to read volts from channel ai7 (wich refers to socket J8 in SC-2345, where SCC-TC02 och mounted) Max calibration tool shows -0,012 (temp probe free in the room temperature) and when I heat it up with my fingers 0,027. I have tried the same test for channel ai15 wich should return the temp value from cjc termistor inside SCC-TC02. It shows 1,5 at room temp. Quote Link to comment
Ton Plomp Posted November 13, 2006 Report Share Posted November 13, 2006 Could you show the code you have? Sorry, my eyes must be glued together. What value do you put into the CJC field? Maybe you have to wire Quote Link to comment
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