Coldbreak Brewing Giveaway - Winners Drawn!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Refractometer correction
Reply
 
Thread Tools
Old 05-02-2012, 11:13 PM   #1
kevinb
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
kevinb's Avatar
Recipes 
 
Join Date: Mar 2012
Location: , MA
Posts: 652
Liked 32 Times on 28 Posts
Likes Given: 88

Default Refractometer correction

My wife bought me a refractometer for my birthday today (yes I have a great wife). I typically extract brew. However, I like the idea of being able to use a couple drops of wort to make a measurement.

I have seen other posts that say they are only accurate before fermentation because of the alcohol after fermentation. Does the Excel spreadsheet on more beer work for FG correction ? Is it accurate? Does anyone else have a conversion that they can tell me about?


kevinb is offline
 
Reply With Quote
Old 05-02-2012, 11:16 PM   #2
lestershy
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: St. Louis
Posts: 134
Liked 2 Times on 2 Posts

Default

I use this site to correct for alcohol.
http://onebeer.net/refractometer.shtml


lestershy is offline
Allergic2hops Likes This 
Reply With Quote
Old 05-02-2012, 11:28 PM   #3
jtejedor
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Las Vegas
Posts: 653
Liked 10 Times on 9 Posts
Likes Given: 6

Default

I use mine during fermentation and after it's done and with the gravity correction its pretty accurate. If I am really really curious I will take a FG reading with a hydrometer. If you have an android phone the brewzor calculator is a great app and includes a refractometer gravity correction tool.
jtejedor is offline
 
Reply With Quote
Old 05-02-2012, 11:30 PM   #4
jslay77
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2011
Posts: 10
Default

Most applications can accept a FG reading from a refractometer as well. It is accurate as long as the correction formula is used.
jslay77 is offline
 
Reply With Quote
Old 05-03-2012, 12:06 AM   #5
Sacdan
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
Sacdan's Avatar
Recipes 
 
Join Date: Jul 2009
Location: Sacramento, CA
Posts: 911
Liked 18 Times on 16 Posts
Likes Given: 1

Default

Quote:
Originally Posted by lestershy View Post
I use this site to correct for alcohol.
http://onebeer.net/refractometer.shtml
+1 I use this site as well.
Sacdan is offline
 
Reply With Quote
Old 05-03-2012, 12:16 AM   #6
BPhad
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Will County, Illinois
Posts: 248
Liked 10 Times on 7 Posts
Likes Given: 4

Default

I've used the morebeer spreadsheet and it seems to work fine. I do take both a refract and hydrometer reading before pitching yeast, then let the spreadsheet do the work after based on refract. I did check the first few readings both ways and it worked fine.
BPhad is offline
 
Reply With Quote
Old 05-03-2012, 12:22 AM   #7
Zen_Brew
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Zen_Brew's Avatar
Recipes 
 
Join Date: May 2009
Location: Seattle
Posts: 1,922
Liked 23 Times on 23 Posts
Likes Given: 3

Default

Some more food for thought. Sean Terrill did a series of experiments to verify common refractometer correction curves and made some adjustments to the common curve. In my experience with it, I find his spreadsheet to correct for readings I used to get that were too low.

http://seanterrill.com/2011/04/07/re...er-fg-results/
__________________
Primary: German Hef, Belgian IPA, Scottish 80, Belgian Dubbel
On Tap: Oatmeal Stout, Vanilla Oatmeal Stout, Belgian Dark Strong, Munich Dunkel, Dunkel Weizen, Oktoberfest, Bock, IPA, Black IPA, English IPA, Pale Ale

Using the mind to look for reality is delusion. Using your senses to look for reality is awareness.

"One time I was so desperate for a beer I snuck into the football stadium and ate the dirt under the bleachers." Homer Simpson

Life, Liberty, and the Pursuit of Hoppiness
Zen_Brew is offline
 
Reply With Quote
Old 05-03-2012, 01:54 AM   #8
Marquez
HBT_SUPPORTER.png
Feedback Score: 11 reviews
 
Marquez's Avatar
Recipes 
 
Join Date: Aug 2008
Location: Littleton CO
Posts: 356
Liked 14 Times on 14 Posts
Likes Given: 22

Default

I use this one:
http://seanterrill.com/2012/01/06/re...er-calculator/

Look here for more information about it:
http://seanterrill.com/2010/06/11/re...final-gravity/
Marquez is offline
ianoconnor Likes This 
Reply With Quote
Old 05-03-2012, 01:58 AM   #9
Johnnyhitch1
Feedback Score: 36 reviews
Recipes 
 
Join Date: Dec 2011
Location: SiX-ThReE-OnE, NY
Posts: 2,137
Liked 241 Times on 202 Posts
Likes Given: 3498

Default

Quote:
Originally Posted by lestershy View Post
I use this site to correct for alcohol.
http://onebeer.net/refractometer.shtml
+1 on this for sure
Johnnyhitch1 is offline
 
Reply With Quote
Old 02-04-2014, 04:19 PM   #10
brewski09
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: columbus, oh
Posts: 854
Liked 41 Times on 40 Posts
Likes Given: 6

Default

I found both Sean Terrill's calculator and the brewers friend to be very close to my actual hydrometer readings (.002 SG points less than actual hydrometer readings).

http://seanterrill.com/2012/01/06/re...er-calculator/

http://www.brewersfriend.com/refractometer-calculator/


brewski09 is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
I'm confused about new refractometer and ATC auto temperature correction... Rolly Equipment/Sanitation 17 09-21-2014 09:47 PM
Can my wort correction factor really be 1.0? Sithdad Equipment/Sanitation 4 01-08-2010 02:20 AM
Hydrometer correction factor steelerguy Equipment/Sanitation 4 04-01-2009 11:12 PM
70 hydrometer correction table egurney Equipment/Sanitation 2 02-10-2009 05:46 PM
Temperature correction for M/L tun cooler? aseelye Equipment/Sanitation 2 01-06-2007 03:11 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS