Hi - I’m running a glycol loop with a small pump and fermwrap for heating. I started my fermentation with a free rise (heater disabled), and then enabled the heater once I reached my desired fermentation temp, which held well. After a couple of days I ramped from 66 F to 71 F, but the swings are much larger. Any suggestions?
Here are my settings and plot:
Beer to Fridge: Kp=0, Ti=0 Td=0
Max diff between fridge/beer set point=18
Beer to fridge input filter delay 18s
Beer to fridge derivative delay 159s
Cooler Kp=10, Ti=1800, Td=200
Cooler PWM 600, Min off 10, Min on 5
Cooler input filter delay 18s
Cooler Deriv filter delay 159s
Heater Kp=30, Ti=7200, Td=120
Heater input filter delay 18s
Heater Deriv filter delay 159s
Thanks for any suggestions.