Thanks for the help. I just bought a Mypin TD4 and a PT100 sensor. I had it in my head that I had a K type thermocouple, that's not correct. If you're having trouble with with crazy temp readouts, over 1000 degrees, make sure the PID is set to the right sensor type. The setting "InP" should be set to "Pt". After I did that, the read out went to within 10 degrees of what another thermometer is saying. The "PVF" setting will calibrate that correctly.