To expand on the programming just a bit, there are 6 programs available. Each one can either be controlled by time or meat temperature. So, specific to your question, program #1 would set cook temperature and a desired internal meat temperature. Once those parameters are met, it kicks to program #2. Program #2 would change cook temperature to the afore mentioned 140 for some set period of time. Once you set your programs, you go about your day and come back to ready smoked food.