Control reads higher temperature than my studio. No error code. What is wrong?

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Control reads higher temperature than my studio. No error code. What is wrong?

I notice the temperature on the display is saying 121F. It's not 121 in the studio. An independent Pyrometer says 80F. There is no error message on display. Did I do something wrong?

See this: hotkilns.com/thermocouple-cone-offset

There is an 18 Deg F offset programmed into the control to compensate for the thermocouple protection tube. Nothing is wrong - just assume the control won't be accurate at room temperature.