Expected differences between dual boiler and HX? - Page 3

[IMAWriter]

For some coffees especially when combined with some barista techniques, the declining brew temp profile does, in fact, result in better coffee (to my taste). Of course, for me these are the rare exceptions to the rule.

That being said... sooner or later people will learn/accept that you can nearly exactly mimic the brew temp profile of a Linea on an HX machine. Dan has some great charts covering this in his article on HX machines.

This, in fact, is part of the one advantage of the HX machine - flexibility of brew temp and temp profile.

You have to pay for this with additional required barista skill. For a skilled barista, however, it seems like it would be a good trade-off.


Both are good.

C...as I have Eric's thermometer thingy installed in my Anita (HX E61), I readily see my water temp decline as the shot is being pulled...(I preface this knowing the temp reading is subject to fluctuations)...say the thermometer reads 201 when I start the pull(a second after my red light goes off...following a requisite flush down to 197f)...the pull starts at a reading of 205...8 seconds in, it's 203, another 8 seconds it 201, at 24 seconds it's at 199...no blonding yet...
Does this fit your description of "declining temperature?"

[cannonfodder]

Erics grouphead adapter shows the actual brew temperature after about 20 seconds. If you pare it with a Scace you will see that the group thermometer reads quite high when compared to the in basket Scace temperature. The group temperature will eventually catch up to the Scace temp around the 20 second mark.

What you will see in the Scace is a slight hump in the first few seconds of the shot, a stable period of relatively flat temperature followed by a slow decline in the final 10 seconds or so. The amount of hump and decline will vary by machine. Some machines will even ascend as the shot progresses. An initial heat exchanger hump, flat temp then a slow increase in temperature.


Decending profile, Eric's adapter and Scace II


Ascending profile, Scace II

[IMAWriter]

C...as I have Eric's thermometer thingy installed in my Anita (HX E61), I readily see my water temp decline as the shot is being pulled...(I preface this knowing the temp reading is subject to fluctuations)...say the thermometer reads 201 when I start the pull(a second after my red light goes off...following a requisite flush down to 197f)...the pull starts at a reading of 205...8 seconds in, it's 203, another 8 seconds it 201, at 24 seconds it's at 199...no blonding yet...
Does this fit your description of "declining temperature?"

My Anita exhibits that hump shown...as i pull, the temps jumps to 207 or so, then after 10 seconds it's down to 203. then declines as I finish the pull
Thanks for your work on this!

[cannonfodder]

The VBM graph is a little deceiving. On most machines those two lines meet in the last third of the shot.