How to correct for uncalibrated refractometer readings? - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > General Beer Discussion > How to correct for uncalibrated refractometer readings?

Thread Tools
Old 08-10-2010, 02:31 AM   #1
Aug 2009
Los Angeles, California
Posts: 508
Liked 6 Times on 6 Posts

So, dumb mistake on my part, but I forgot to calibrate my refractometer for the last couple of brews. What struck me as odd was that my efficiency seemed to go up lately, but my attenuation apparently went way down. Lo and behold, I calibrate the sucker today and it's reading 1.5 Brix with regular water.

I guess my question is how to assess the readings I made while it was uncalibrated? My OG on those readings was only slightly above average, but FG was about 10 gravity points higher than expected. Does this mean my efficiency actually went down recently?

Reply With Quote
Old 08-10-2010, 04:23 AM   #2
Half-fast Prattlarian
GilaMinumBeer's Avatar
Jan 2008
Posts: 59,758
Liked 7888 Times on 6410 Posts

Yep. Subtract 1.5Brix from everything.

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Refractometer winstonofbeer General Beer Discussion 16 06-13-2010 02:27 PM
Is my ABV value correct? NyQuil_Driver General Beer Discussion 10 03-04-2010 09:41 PM
Refractometer!! stephelton General Beer Discussion 14 03-08-2009 04:43 AM
OG, different readings between hydrometer and refractometer MikeRobrew General Beer Discussion 3 12-31-2008 01:09 AM
I tried a refractometer- not so hot Hammer General Beer Discussion 32 10-28-2008 02:42 PM

Forum Jump