Set the controller for degrees F. Convert your degrees C program to degrees F. 1 degree F is .55 degrees C.
Below is the F/C temperature conversion formula. Use formula #1 to convert a firing temperature. Use formula #2 to convert a change in temperature, or rate.
Conversion Formula 1: Firing temperature (i.e. "Fire to 1600F." Example: 1600F = 871C)
(C x 1.8) +32 = F
(F - 32) divided by 1.8 = C
Conversion Formula 2: Firing rate or temperature change (i.e. "Fire at 200F per hour" or "Fire 200F hotter." Example: 200F = 111C)
C x 1.8 = F
F divided by 1.8 = C