I'm watching my dashboard and see that my freezer is kicking on, bringing temps down about 2 degrees and then turning off. Then my heating mat turns on and warms up the freezer and then the freezer turns back on. I'm set for PID.
I don't think my electric bill will like this. I'd rather have some drift off the temperature (not too much) than have the freezer and heater switching on and off all day and night. That seems a bit silly.
Right now I've got the compressor delay set at 8 minutes for the freezer and 9 minutes for the heating mat. Adding some time to the heating mat delay seems to have helped a bit as I originally had that at just one minute. That did get the range of the temp swings to tighten from over 1.8 degrees to closer to 1 degree.
My question is what's the best method here? I'm inclined to add more time to the delay of the heating mat. If my temps are at the low end for a longer period, ambient room (garage) temps and the thermal mass of the beer will bring the temp back up just enough to avoid kicking in the heating mat.
My original hope was that the Model-T would figure all this out, but it appears we need to help it along. How long is the learning cycle, is it ongoing, and does it reset with each session?
All input and suggestions are appreciated.