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.