Who has ever used and programmed an SDC36 thermostat?

[a smile]

I use a YAMATO Muffle furnace, the original factory controller is broken, I am ready to replace a SDC36 controller. But I don't know how to write the control logic. Because the temperature goes up and down linearly. For example: when you need to heat up to 1200 degrees and maintain this temperature, you need to stop heating before 1200 degrees, what is the approximate lead amount, and other temperature lead amount, how to control the temperature relatively accurately?
Who is working in the field of temperature control, or has some research experience? I wish I could get some guidance! Thank you!