12 Mar
2005
12 Mar
'05
3:04 p.m.
Ray is right. But there are corrections that can be made to account for the
skewing of the reading due to the alcohol presence. These involve a precise
measuring of the OG. So in turn your refractometer can give you reasonably
accurate FG readings. If using ProMash there try this In Promash go to
Calculators>Refractometers Utilities>Specific Gravity During Fermentation.
I think if you then plug your values into that calculator your Refract
values will match your Hydrometer values. If not using Promash then try a
website like this http://brew.stderr.net/refractometer.html which will due
the same thing. Hope thi helps. Cheers!
Juno Choi
Northern Brewer
Store (651)291-8849
Fax (651)223-6114
juno(a)northernbrewer.com
On 11 Mar 2005, Jim L. Ellingson wrote:
An interesting discussion why you can't measure
the FG of your
fermented beverage w/ your refractomer....
Cheers,
Jim
mmmmm. Maibock is back!
----- Forwarded message from zemo <zemo(a)AMERITECH.NET> -----
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Date: Fri, 11 Mar 2005 16:39:35 -0600
Reply-To: zemo <zemo(a)AMERITECH.NET>
From: zemo <zemo(a)AMERITECH.NET>
Subject: Re: Plato / Brix
To: CBS-HB(a)LISTSERV.UIC.EDU
Precedence: list
Several people questioned my post off list.
So, as soon as I got home, I pulled a sample
of the saison to check the SG and went over
my recipe data.
The OG of the saison was 1.054.
[I confused it w/ a 1.063 biere de garde.]
I used a "bottling" hydrometer to check the FG.
Range 0.990-1.020. It's reading 1.005 @ 60F.
[Carboy was sitting on cellar floor @ 60F.]
A recalibrated refractometer reading was 6.2 Brix.
In ProMash, in the "Gravity During Fermentation"
calculator, that equals 1.007. Close. 8^)>
Should I try Clinitest? 8^)> x2
Andy, what was the OG of your tripel?
Z
----- Original Message -----
From: "Zemo" <zemo(a)BUYVICTORY.COM>
To: <CBS-HB(a)LISTSERV.UIC.EDU>
Sent: Friday, March 11, 2005 11:45 AM
Subject: Re: Plato / Brix
> Unless you have the brewing software ProMash
> ($25, www.promash.com) which has a calculator
> for "Determining Gravity During Fermentation".
>
> You enter the OG and your Brix/Plato reading.
>
> Example:
> My saison's OG was 1.063.
> My refractometer reading was 6.0 Brix.
> Final gravity: 1.005
>
> Z
>
> ----- Original Message -----
> From: "Ray Daniels" <raydan(a)AMERITECH.NET>
> To: <CBS-HB(a)LISTSERV.UIC.EDU>
> Sent: Friday, March 11, 2005 10:53 AM
> Subject: Re: Plato / Brix
>
>
> > Andy:
> >
> > Alcohol corrupts the reading of refractometers and they can't be used
to
> > assess TG. (Visual properties of alcohol are
different from those of
> > water/wort.) Sorry to disappoint you, but you'll have to use a good
> > old-fashioned hydrometer for that. (Either that or a pycnometer, but
you
> > don't want to go there unless you have
a scale that is precise to
> > hundredths of a gram.)
> >
> > The refractomerter is still great for OGs and assessing yield from
the
> mash.
>
> Cheers,
>
> Ray Daniels
> Director, Craft Beer Marketing
> Brewers Association
>
> ray(a)brewersassociation.org
> 773-665-1300 Chicago Office
> 303-447-0816 x125 Boulder Office
> or 312-203-8383 cell
>
>
>
> As of January 1, 2005 we are officially the "Brewers Association."
> Please note the new name and email address.
>
>
>
> > -----Original Message-----
> > From: Chicago Beer Society Home Brewer List
> > [mailto:CBS-HB@LISTSERV.UIC.EDU] On Behalf Of Andrew R. Smith
> > Sent: Friday, March 11, 2005 10:50 AM
> > To: CBS-HB(a)LISTSERV.UIC.EDU
> > Subject: Plato / Brix
> >
> >
> > Question:
> >
> > Are the Plato and Brix scales interchangeable? Everything
> > I've read so far says that they are, but I'm running into
> > contradictions.
> >
> > Using my new, automatic temp compensation refractometer,
> > calibrated with distilled water, I get a reading of ~ 6 Brix
> > on a Paulaner Munich Lager (which should have a final gravity
> > ~ 3 deg Plato). So, the obvious conclusions I'm coming up
> > with are that either the scales are not completely
> > interchangeable, my new refractometer is a dud, or I'm using
> > my new refractometer incorrectly.
> >
> > I've got a Tripel that's been in the secondary for more than
> > a month and has been hovering at ~ 9 Brix for the last two
> > weeks (measured using the same technique as above). I've
> > been reluctant to bottle it because Promash tells me that it
> > should be ~ 3 deg Plato at FG. If the scales are
> > interchangeable, I've got a slow/stuck fermentation. If they
> > aren't, I might be able to get on with my brewing life and
> > package my beer.
> >
> > Any help out there?
> >
> > Thanks a ton,
> > Andy Smith
> >
----- End forwarded message -----
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