Ok, read that thread. I guess what's strange to me is that, the gauge is almost pointless. I suppose it's useful to know if something has gone really wrong, but otherwise you can't really use it to adjust or to fine tune your pressure. It's just a little misleading to me I guess.
On Wed, Jan 28, 2009 at 8:03 PM, TWG <[email protected]> wrote: > > Search this group with the terms: Calibrating Brew Pressure > > This should help clarify the difference between the pressure shown on > the Brewtus guage versus the pressure in the portafilter. 11.5 on the > Brewtus guage may be a bit high but not way out of line. > > On Jan 28, 10:36 pm, Chris Bailey <[email protected]> wrote: > > Just confirmed, with a blind PF in, it holds steady at 11.5 bar on my > gauge. > > > > On Wed, Jan 28, 2009 at 7:33 PM, Chris Bailey <[email protected] > >wrote: > > > > > > > > > > > > > This was one of my worries, was that the pressure gauge wasn't > accurate, > > > and then as per Todd's note that what the gauge reads isn't necessarily > what > > > the actual pressure is. That is pretty poor in my opinion - why bother > > > putting a gauge on there if it's going to be wrong. But, alas, that's > what > > > we have. This is one reason I'm nervous to monkey with it, as it's > hard to > > > say whether it's really wrong or not, it just surprised me that mine > > > consistently reads 11 bar (with blind PF or when pulling shots). I'll > > > verify that in a few minutes, but pretty sure. > > > I'm grinding, tamping, etc. as per standards AFAIK: 30lb tamp, grounds > > > typically around 15g in the double basket, grind setting such that my > shots > > > are typically in the 25-30 second range from the time I pull the lever > to > > > when I've filled a cup approx 1.5oz by volume (I mostly pull shots by > where > > > it fills to on my cups, but have measured this and it's right about > 1.5oz). > > > I've read a fair bit, practiced a ton, use only fresh beans (3 to > maybe at > > > most 9 days after roast date), grind on a nice Macap grinder, etc. > I've had > > > a friend who's pulled a ton of shots use my machine as well. > > > > > On Wed, Jan 28, 2009 at 7:05 PM, <[email protected]> wrote: > > > > >> Also be aware that the pressure gauge on the Brewtus II can be wrong. > I > > >> went to considerable effort and expense to more or less establish (to > the > > >> degree that the large pressure gauge that I bought is accurate. It was > sold > > >> with the statement that it has an accuracy of 1%) that the pressure > gauge on > > >> my machine is two bar off. I wrote about this at the time on this > group, so > > >> you might be able to find it with a search. > > > > >> Allen > > > > >> *From:* Chris Bailey <[email protected]> > > >> *Sent:* Wednesday, January 28, 2009 4:56 PM > > >> *To:* [email protected] > > >> *Subject:* Re: Adjusting pressure > > > > >> My screw looks like it's metal, and is located on the front of the > > >> machine, lower right corner, once you've removed the drip tray. Sound > > >> right? I do tamp to 30lbs. I'll use the blind PF to set the > pressure, > > >> thanks for that info! > > > > >> On Wed, Jan 28, 2009 at 5:46 PM, BinBakinBeans < > [email protected]>wrote: > > > > >>> Which version of Brewtus? > > >>> The first had a teflon screw on the opv valve that became problematic > > >>> after adjusting the pressure. > > >>> The first of the BII had teflon as well. They were later switched to > > >>> an opv with a brass adjusting screw. I replaced mine with one of > these > > >>> after I had problems with my original teflon screw opv on my BII. > > >>> Strangely enough, Expobar has again gone back to using an opv with a > > >>> teflon screw on the new BIII machines. > > >>> I would say go ahead and adjust it, especially if it is a brass > > >>> screw. If it is teflon, be prepared to "possibly" have some future > > >>> problems with it. Not a big deal to change it out if you do. > > >>> Use the blind filter in the portafilter to get it down to about 8.5 > to > > >>> 9 on the guage. > > >>> Check again when you actually pull a shot that it is around 8.5. I > > >>> will assume that you will have properly tamped to about 30 pounds. > > > > >>> On Jan 25, 12:27 pm, Chris Bailey <[email protected]> wrote: > > >>> > I've seen a fair bit of talk on the list about adjusting pressure. > > >>> Given > > >>> > the fact that there's tape over the pressure adjust screw on my > > >>> machine, and > > >>> > all the warnings about don't touch it, only let the factory do it, > etc, > > >>> > etc., I'm leery of messing with it. Also, my understanding is that > > >>> > supposedly the factory has pulled shots and checked the pressure > and > > >>> set it > > >>> > properly. > > >>> > But, I've just wondered about it. My pressure gauge typically > reads > > >>> about > > >>> > 11 bar when I'm pulling shots. I'm unclear on whether it's > supposed to > > >>> read > > >>> > the true 8.5-9 bar that an espresso should be done at, or whether > the > > >>> gauge > > >>> > is a pressure at a different point in the system and thus the real > > >>> pressure > > >>> > at the PF is lower, or not. > > > > >>> > Can folks discuss this a bit? Other than taste, are there ways for > me > > >>> to > > >>> > know whether my machine is set right or not, and/or if I'm going to > > >>> adjust > > >>> > it (and potentially void my warranty?) how can I know when I've set > it > > >>> to > > >>> > the right spot? From the reading I've done I think I understand > that > > >>> too > > >>> > much pressure can actually cause a build up and not get things > flowing > > >>> > properly (which seems a bit backwards, but I sort of understand). > > > > >>> > Anyway, let me know what folks think. > > > > >>> > -- > > >>> > Chris Bailey > > >>> > [email protected] > > > > >> -- > > >> Chris Bailey > > >> [email protected] > > > > > -- > > > Chris Bailey > > > [email protected] > > > > -- > > Chris Bailey > > [email protected] Hide quoted text - > > > > - Show quoted text - > > > -- Chris Bailey [email protected] --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Brewtus" group. 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