The numbers don't add up again...WHY?!?

[sdugre]

no CFC for me. Just an immersion chiller

Do you put the immersion chiller in the kettle during the boil (after the pre boil reading is taken) ? That could make your post boil volume reading look higher than it really is.

What I found in my problem was that since I wasn't accounting for my boil volumes correctly (but not adjusting for the cfc volume), I was in turn calculating my apparent evaporation rate incorrectly. When I put this into beertools, it calculated an incorrect SG, even though the pre-boil gravity was correct.

 

[TacoGuthrie]

I agree with bottlebomber. Have you adjusted your efficiency? I know that's not my problem (would that it were and the problem could be solved!) since my pre-boil gravity is correct. There's got to be something screwy with the beersmith water volume calculations as far as I can tell. I've also posted to that forum and am still awaiting a response. I'll definitely update here if I get any news.

I'm still trying to wrap my head around the information in this thread. But I brewed yesterday and had the same result. Using your format from pg 1 klnosaj:

------------------estimated -------measured

pre-boil SG---------1.056------------1.055

pre-boil H2O vol----7.0 gal-----------7.0 gal

post boil SG--------1.067------------1.060

post-boil H2O vol---5.98 gal----------~5.85 gal

I don't think adjusting my efficiency is the answer because if I do it drops all my gravity readings and pre-boil is always within a point.

Perhaps I'm not measuring my post-boil volume correctly, or accurately enough? I'm a little less that 5.5 into the carboy. I took the 1/2 cup sample too.

What is the most accurate way to measure trub? Trub volume must be completely different depending on hop amounts and whole vs pellet.

Did you ever get a response from Beersmith forums?

 

[Veedo]

You sure something isnt goofy in your equipment profile?

 

[TacoGuthrie]

Here is my equipment profile. Anyone see any red flags in there?

I do really want to know how to properly measure trub loss though.

 

[duboman]

Here is my equipment profile. Anyone see any red flags in there?

I do really want to know how to properly measure trub loss though.

Your trub loss will differ slightly but when you rack out of primary and into bottling bucket the difference between the two volumes is your loss

 

[TacoGuthrie]

I thought that in the equipment profile the loss to trub/ chiller was the bottom of the brew kettle.

Where do i account for that .5 gallon in my equipment profile?

Maybe that is my issue.

 

[klnosaj]

I've become convinced that my problem is with shrinkage (high-five if your brain just flashed to that Seinfeld episode). My error comes down to having an extra quart of volume somewhere. That's not a lot at all but obviously is enough to throw off gravity numbers significantly when dealing with fairly low-gravity beers. I haven't discovered where that extra quart is coming from but I really hope I can.