limelight @DavecUK - any good source of info for arriving at what you did for the coffee
I don’t quite understand the question. However, for a coffee boiler, you don’t want a PID over or undershooting, so you have to strike a balance between recovery times and these two things. Plus using something like a SCACE II for measuring brew temperature. I used to use something I invented almost 18 years ago, which was in effect a Scace II but it needed rebuilding every few years. I now have a scace II, but still check it with my older device.
The temperature testing normally takes me 3-7 days, as I don’t test like they do in a Lab, I do real world testing and that takes a long time….e.g. I may leave a machine for 2 hours, run a shot, then 1 hour and do another…or leave it 2 hours then do 2 shots in a row etc.. Theres a lot of combinations to do….and you have to wait hours between a lot of them.
The manufacturers don’t test like me, and to the best of my knowledge, no one else does either.