Background. I purchased a Dwyer (Love) 16110 controller off of fleabay (cheap) and found the manual and spec sheet on the net.
Powered up just fine and noted that it was reading about 40C with a K thermocouple attached.
I muddled through the menus and changed the thermocouple to a K type and display in Farenheit.
My office runs about 75F - the unit was displaying 104. I reset the unit to factory defaults, and had the same results.
Placing the TC in a pot of boiling water showed 235F. Likely it is a calibraton problem...
A call to Dwyer Tech Support and the response was pretty much "that's a really old controller" (internal date codes show 1993).
Anyway, the question at hand us that if I understand the NIST
tables a K thermocouple at 0 degrees C (32F) has an output voltage of 0.0000 volts
Am I understanding the tables correctly? (I'm curious as a J type TC has the same voltage at 0.) Or is this an offset from the measured temperature of a given TC at 0?