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Old 01-20-2013, 04:12 PM   #1
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Default 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?

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Old 01-20-2013, 04:15 PM   #2
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It could be, but I've never had an accurate FG reading with a refractometer, even with the correction software.

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Old 01-20-2013, 05:49 PM   #3
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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?

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Old 01-20-2013, 05:52 PM   #4
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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.

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Old 01-20-2013, 06:17 PM   #5
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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.

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Old 01-20-2013, 08:36 PM   #6
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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.

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Old 01-20-2013, 10:18 PM   #7
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Sounds like the reading is at least a little bit off. That attenuation just doesn't seem likely w/ that grain bill/mash schedule.

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Old 01-21-2013, 12:48 PM   #8
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Quote:
Originally Posted by CharlosCarlies View Post
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.
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Old 01-27-2013, 02:05 PM   #9
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Just an update.

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

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Old 01-27-2013, 02:51 PM   #10
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1.008 makes A LOT more sense.

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