Hello folks,
just found this thread and out of curiosity checked my PID settings. Found out the "d" value was set to 8. I actually reversed it back to factory recommended settings but to be honest I have no idea what I actually changed.
Could anyone point me a nice PID explanation? Im sure somebody already wrote it.

Thank you

EDIT: found it (sort of) Good all round explanation of PID stuff

One other thing that i cant sort out is this:

E1 value is set to 14; t1 is set to 92 Celsius and in group Erics thermometer shows 96 C during extraction.

T1 set to 88C = 92C on Erics thermometer.

Any idea, how to play with these values to match more closely both temps?

You don't necessarily want to match those temps because the two sensors are measuring different temperatures. See the PDF document I sent you.

A reasonable group temp when the machine is fully warmed up and just sitting there at idle is 196-197 F (91.1 - 91.7 C).

Hi Eric,
thanks for the reply - i read the pdf but still i'm confused.
Here is what i observed:

1) Boiler temp (t1) set to 90C gives a 85C (on group - your thermometer) read on idle machine - after 60min of sitting there idle... (room temperature is around 26-28C at the moment)
2) When water is flowing thru an empty basket on group reading jumps to 93C and keeps it for 25sec that I tested
3) When water is flowing on a blind basked (or coffee), after a couple of minutes of recovery just in case, on group reading gives me 91C - this value +/-0,5C is also constant during 25"-30".

So basically to get to this point:

A reasonable group temp when the machine is fully warmed up and just sitting there at idle is 196-197 F (91.1 - 91.7 C).

I would have set t1 boiler temp to ~95C - but this would result in some crazy temps while brewing.

I still hope that there is an optimal p-i-d value set that in conjunction with properly set E1 would give similar reads at both measuring points and from what I observed (unless i didn't get anything wrong) this is what I should be aiming for.

Just purchased a Profitec 700 today (replacing my much loved Technika Profi IV). Played around with the Scace and found brew temps to not match PID readings... as per this thread found d to be 8 and changed back to recommended 4. Now Scace is showing on the money brew temps. Thanks so much for sharing in this post, I would have gone crazy without this information!

kwantfm wrote:found d to be 8 and changed back to recommended 4. Now Scace is showing on the money brew temps.

How about E1? Today I played with it and found that E1=10 gives me *almost* exact temps from PID (t1) and Eric's thermometer.
The rest is as per manual:
P=2,5
I=0,02
D=4

Had a bit more of a play this evening. E1 at 12 produces good numbers for me. In addition I was a bit concerned about PID overshoot when the brew boiler is heating post extraction. My target brew temp is 92*C and I was finding that the PID reading could get to 95*C. Please let me know if my thinking is not accurate but I am happier with a more gradual approach to target from the low side rather than quick heating beyond target and then relatively slow loss of temperature to return to target. I also have relatively slow work flow as I hand grind with an HG one. I altered the P constant to 0.9 (manufacturer's recommendation at 2.5) and have found that PID reaches 92*C in about 40 seconds post 27 second extraction.

I've found that intrashot temperatures tend to rise with an average rise of about 0.5*C up to the very occasional 1.0*C rise (I haven't been able to determine what factors affect the size of this rise).

kwantfm wrote:(I haven't been able to determine what factors affect the size of this rise).

Perhaps the group temperature at the start of brew.

. . . and I was finding that the PID reading could get to 95*C. Please let me know if my thinking is not accurate. . .

What the PID reads is only sorta relevant. When you have about 30 grams of liquid going up against ~ 4200 grams of brass, who ya think is going to win?