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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Issue with a Robust Porter's Attenuation

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Old 02-09-2013, 02:02 AM   #11
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Originally Posted by stpug View Post
It's easier done than explained . This site gives all the nitty gritty details.

http://seanterrill.com/2012/01/06/re...er-calculator/
*Mindblown* (I think)

So this refractometer has been lying to me this whole time?
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Old 02-09-2013, 02:07 AM   #12
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Alright. So after pumping from boil kettle through chiller and into fermenter, I always take an accurate hydrometer reading. However, as fermentation occurs, I sample with a 5ml glass pipette and test the gravity with a VeeGee refractometer. Correct me, if I'm wrong, but I should be using my initial reading against the refractometer reading adjusted for the factor given on sean terrill's site? Sorry for probably not going through the fine print, but it is Friday and I have been drinking beer which may in fact be higher in ABV than I thought. Ha!

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Old 02-09-2013, 02:19 AM   #13
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I tried to give them a bit of a swirl a few days ago, but I didn't want to do the stir for fear of oxygen and contaminates.
You definitely don't need to stir once you have re-pitched more yeast like you did.

It sounds like stpug has pointed you in the right direction with the refractometer info...
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Old 02-09-2013, 02:23 AM   #14
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You definitely don't need to stir once you have re-pitched more yeast like you did.

It sounds like stpug has pointed you in the right direction with the refractometer info...

Going through the small print of that point in the morning is definitely on the agenda. Thanks to all of you who helped out. I love it around here!
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Old 02-09-2013, 04:08 PM   #15
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Just to provide an update in case it helps the next brewer...

I racked the porter over to a corny this morning, took a hydrometer reading, and it was right on 1.0215. Thanks guys.

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