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Pavoni EPC-8: A Few Questions
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dana_leighton
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dana_leighton
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Espresso: Isomac Relax; Caferina...
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Posted Tue Oct 15, 2013, 7:27pm
Subject: Re: Pavoni EPC-8: A Few Questions
 

MattJ Said:

I think this thread predated the Lever room's creation.  Can someone move it please?

Posted October 15, 2013 link

done.

 
Dana Leighton - Espresso hack and CoffeeGeek moderator
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russel
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Posted Tue Oct 15, 2013, 7:37pm
Subject: Re: Pavoni EPC-8: A Few Questions
 

You need to abandon volume as a shot metric and start weighing your dose and output.  I use the plug-in version of the following, its cheap and fairly durable:

Click Here (www.amazon.com)

Your dose weight / shot weight is the brew ratio.  Consistency means hitting the same shot weight in the same amount of time for a given dose, or at least within an acceptable personal margin of error that you have established by tasting the shots.  On an LP, the group temperature plays a huge role in this.  I would also recommend at least a temp strip on the group:

Click Here (www.orphanespresso.com)

or better yet a digital thermometer:

Click Here (www.home-barista.com)
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MattJ
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Posted Thu Oct 24, 2013, 10:55pm
Subject: Re: Pavoni EPC-8: A Few Questions
 

I have heard recommendations to weigh the dose several times, but I've always thought that seems a little OCD.  I guess I could try it a few times.  The pressure in the boiler is a direct representation of the temp of the water, no?  I'm no genius but I remember a few formulas from Chemistry I that explained the relationship between temp, volume and pressure.  If the volume is static then the other two are directly related, no?  I had one of those little strips when I first got this machine.  It was cold before I turned it on.  Once I turned it on it got real hot.

I pull awesome shots out of this thing.  It took me years to do it.  But, the preinfusion still perplexes me.  Sometimes it saturates in and I get good pressure immediately.  Sometimes it takes 3/4 of the pull before I get any pressure.  Lately I just keep pumping it until I get real pressure and then pull and the handle feel, volume, and shots have been nice.  Maybe that's my solution, but I've always feared disturbing the puck.  I guess I could go naked portafilter or weigh shots.  Thanks for the input.
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