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Espresso: Espresso Machines
Truth About GS3 Temperature Offset

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Discussions > Espresso > Machines > Truth About GS3...

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JacobS
Senior Member

Joined: 5 May 2006
Posts: 133
Location: Copenhagen
Expertise: I love coffee

Espresso: GS/3
Grinder: Robur
Roaster: Probat '73 RE 1 Sample...

Posted Mon Apr 7, 2008, 5:05am Subject: Re: Truth About GS3 Temperature Offset

What does your taste buds tells you?

EricC
Senior Member

Joined: 2 Feb 2004
Posts: 190
Location: Liverpool
Expertise: I like coffee

Espresso: La Marzocco GS/3
Grinder: Versalab M3
Roaster: Hottop

Posted Mon Apr 7, 2008, 5:42am
Subject: Re: Truth About GS3 Temperature Offset

JacobS Said:

What does your taste buds tells you?

Posted April 7, 2008 link

Well, they tell me that the GS/3 does the compensation itself, but then again they could always be faulty. :-)

roblumba
Senior Member

Joined: 30 Jan 2006
Posts: 349
Location: San Jose
Expertise: I love coffee

Posted Mon Apr 7, 2008, 7:07am
Subject: Re: Truth About GS3 Temperature Offset

EricC Said:

But NOT according to Chris Tacy, on this Home Barista thread :

Click Here (www.home-barista.com)

he states : Quote " My prototype has the software version that allows for programmed compensation (allowing you to correct for the offset and thus displaying the actual brew temp when you set your target). " End Quote .

Regards
Eric

Posted April 7, 2008 link

I think when Chris said it allows for you to correct for the offset, he was referring to the real life offset (difference between boiler measured temp and group head temp) because in that same post Chris was quoting someone who had discovered a 3 degree difference between the boiler temp setting and the group head temp. This compensation Chris referred to is referred to as the offset that everyone has set in their GS3. Your offset is set to 5.4 because the actual offset in real life was measured to be 5.4 between the group head and the boiler temp.

So basically, you will see the boiler set temp + offset on your display.

Boiler Set Temp + offset = Group Head Temp.

Therefore, when you look at your display, you are seeing the group head temp.

So if you want 201F you need to add 5.4 to your boiler temp setting. Then the math looks like this.

206.4 boiler temp + (-5.4) offset = 201 displayed group temp

JacobS
Senior Member

Joined: 5 May 2006
Posts: 133
Location: Copenhagen
Expertise: I love coffee

Espresso: GS/3
Grinder: Robur
Roaster: Probat '73 RE 1 Sample...

Posted Mon Apr 7, 2008, 9:47am Subject: Re: Truth About GS3 Temperature Offset

Eric talks about when you in the mode for changing the brew boiler temperature. Mine shows the uncompensated temperature! But I would not rule out that a later software update will make you work with the compensated temperature instead? Eric which software version is your machine using?

roblumba
Senior Member

Joined: 30 Jan 2006
Posts: 349
Location: San Jose
Expertise: I love coffee

Posted Mon Apr 7, 2008, 9:55am Subject: Re: Truth About GS3 Temperature Offset

When you set the boiler temp, that's exactly what you are setting, the boiler temp. When you look at the display during normal operation, it shows the boiler temp + offset.

EricC
Senior Member

Joined: 2 Feb 2004
Posts: 190
Location: Liverpool
Expertise: I like coffee

Espresso: La Marzocco GS/3
Grinder: Versalab M3
Roaster: Hottop

Posted Mon Apr 7, 2008, 10:35am
Subject: Re: Truth About GS3 Temperature Offset

JacobS Said:

Eric talks about when you in the mode for changing the brew boiler temperature.

Mine shows the uncompensated temperature!
But I would not rule out that a later software update will make you work with the compensated temperature instead?

Eric which software version is your machine using?

Posted April 7, 2008 link

Hi Jacob,
The software is Rev 1.11
Eric

EricC
Senior Member

Joined: 2 Feb 2004
Posts: 190
Location: Liverpool
Expertise: I like coffee

Espresso: La Marzocco GS/3
Grinder: Versalab M3
Roaster: Hottop

Posted Mon Apr 7, 2008, 10:45am
Subject: Re: Truth About GS3 Temperature Offset

roblumba Said:

When you set the boiler temp, that's exactly what you are setting, the boiler temp. When you look at the display during normal operation, it shows the boiler temp + offset.

Posted April 7, 2008 link

Thanks Rob.

Eric

EricC
Senior Member

Joined: 2 Feb 2004
Posts: 190
Location: Liverpool
Expertise: I like coffee

Espresso: La Marzocco GS/3
Grinder: Versalab M3
Roaster: Hottop

Posted Mon Apr 7, 2008, 10:47am
Subject: Re: Truth About GS3 Temperature Offset

JacobS Said:

But I would not rule out that a later software update will make you work with the compensated temperature instead?

Posted April 7, 2008 link

I do hope so Jacob, I think. :-)

Eric

Teme
Moderator

Joined: 7 Jan 2005
Posts: 1,179
Location: Finland
Expertise: I love coffee

Espresso: La Marzocco GS3
Grinder: Mahlkönig K30 Vario

Posted Mon Apr 7, 2008, 1:48pm Subject: Re: Truth About GS3 Temperature Offset

JacobS Said: But I would not rule out that a later software update will make you work with the compensated temperature instead? Posted April 7, 2008 link Hi Jacob, I think this would be great in the ideal world, but only if one can be sure that the offset is set up correctly in the first place (and done so in each and every GS3 out there). Just my opinion, though. Personally I have stopped at looking at the temps on the display (I have my offset at -2.8C FWIW) and go purely on taste. I assume everyone agrees that the great thing about the GS3 is that the temp is so easy to adjust (as long as you allow some time for it stabilise after a change) and once set you can rely on the machine to be stable and deliver every time! Switching from one coffee to another is also easy once you learn the coffee, blend and roast degree. Dialing in naturally takes a bit longer with an unfamiliar coffee, but it is still easy... By the way, it was great to meet you Jacob and thanks for the DVD! Br, Teme

www.espresso-passione.com (my blog) www.pbase.com/teme (my photo galleries) www.ristretto.fi (my Finnish language coffee site) LMWDP #039

rbh1515
Senior Member

Joined: 15 Feb 2003
Posts: 1,057
Location: Milwaukee
Expertise: I love coffee

Posted Mon Apr 7, 2008, 6:00pm Subject: Re: Truth About GS3 Temperature Offset

Interesting read. I'm seriously thinking of getting a GS3. Already own a Scace device which I've used over the last year to tweak my HX machine. Rob

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