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-   -   96% attenuation? (http://www.homebrewtalk.com/f163/96-attenuation-383048/)

PJoyce85 01-20-2013 04:12 PM

96% attenuation?
 
Just transferred a French Farmhouse Ale and used Wyeast 3711. Started at 1.062 and fermented for 2 weeks at 68.

When I transferred, it was down to 1.002. I use a refractometer and NB's online calculator.

Can this be right?

Yooper 01-20-2013 04:15 PM

It could be, but I've never had an accurate FG reading with a refractometer, even with the correction software.

CharlosCarlies 01-20-2013 05:49 PM

It's possible, but yeah using a refractometer for FG is going to leave you w/ less than desirable accuracy.

What was the grain bill and mash schedule like?

beergolf 01-20-2013 05:52 PM

Double check with a hydrometer, but it is very possible that it is at 1.002.

3711 is a beast and will often finish that low.

PJoyce85 01-20-2013 06:17 PM

Grain bill was:

6.75lbs Vienna
5lbs Munich
10oz Carawheat
5oz Caramunich
5oz Melanoiden

152 for 60 minutes.
This is the recipe that Two Brothers Brewing gave me.

I normally use a hydrometer, but thought I would give the refractometer with NB's calculator a test. When I keg next weekend, I will double check and see if it is right or not.

I got a weird reading with the APA I also transferred today. I think it is the calculator.

pdxal 01-20-2013 08:36 PM

Most accurate calculator I have seen is this one:
http://seanterrill.com/2012/01/06/re...er-calculator/
Wy3711 could certainly bring 1.062 down to 1.002 with that grain bill and those mash parameters.

CharlosCarlies 01-20-2013 10:18 PM

Sounds like the reading is at least a little bit off. That attenuation just doesn't seem likely w/ that grain bill/mash schedule.

beergolf 01-21-2013 12:48 PM

Quote:

Originally Posted by CharlosCarlies (Post 4807081)
Sounds like the reading is at least a little bit off. That attenuation just doesn't seem likely w/ that grain bill/mash schedule.

I agree. With that recipe and mash schedule it probably will not get quite that low.

PJoyce85 01-27-2013 02:05 PM

Just an update.

Kegged it today and it was at 1.008 so the calculator was way off.

CharlosCarlies 01-27-2013 02:51 PM

1.008 makes A LOT more sense.


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