Pstat dead band is about 1.15 to 1.35 bar. I think I'd like to install a PID eventually, mostly so I can have a timer to lower boiler temp at night and raise it in the day. I'm not sure how to get a temp probe into the boiler, but I would guess a temp probe on the outside of the boiler will read close enough to the internal temp. I measured the external temp at 222F when the boiler pressure gauge read 1.3 bar, and the boiling point of water at 1.3 bar is 225F. My understanding is that with a HX machine, precisely controlling the boiler temp during operation isn't that critical?
I still think the brew water seems not hot enough. When pulling a shot with no portafilter, the water isn't flash steaming or anything similar. I'm curious how best to measure brew temperature, beyond sticking my instant read thermometer into the portafilter spout. Maybe a probe into the group connected to a display mounted somewhere not too unsightly?
I did pull a few experimental shots but - don't laugh - I don't have a tamper so it was hard to prepare the coffee in the basket. Anyway, the shots were drinkable. Better, to my taste, than I often get at cafes. I have lots of experimentation ahead. Random beans, but freshly ground. The shots seemed a little lukewarm. One had about 1/4" of crema.
John, Portland OR
Vintage bicycles, Porsche/VW, cooking, old houses.