Adjuncts in boil kettle shouldn't affect pre-boil gravity

Suggestions and discussion about upcoming features in future BeerTools Pro releases.
Post Reply
Otter
Posts: 2
Joined: Thu Feb 12, 2009 12:47 pm
Location: Atlanta, GA

Adjuncts in boil kettle shouldn't affect pre-boil gravity

Post by Otter »

Just noticed this on a belgian Tripel recipe. When I added the 2.5lbs of Table Sugar, the pre-boil gravity changed.

I like to use the pre-boil gravity to let me know what I need to collect out of my mash.
User avatar
billvelek
Imperial Stout
Imperial Stout
Posts: 801
Joined: Fri Mar 05, 2004 9:44 am
Location: Arkansas, USA
Contact:

You can uncheck the ingredient and then check gravity

Post by billvelek »

I thought maybe there was a "stage" that you could set to eliminate that problem, but I see that there isn't, which seems strange to have appropriate menu items that are dimmed out. E.g., most brewers don't boil their honey -- at least not for the full length -- but it isn't possible to select "Primary Fermenter".

Cheers.

Bill Velek
Visit www.tinyurl.com/bvelek - portal to my brewing sites: 3,100+ members on 'Grow-Hops', and 1,350+ brewers on my 'BrewingEquip' group.
Running BTP v1.5.3 on WinXP 2005 SP3 w/AMD Athlon 64@3800+, 1GigRam, Res 1024x768
User avatar
jeff
Imperial Stout
Imperial Stout
Posts: 1602
Joined: Sun Jan 09, 2000 8:16 pm
Location: Hollywood, SC
Contact:

Re: Adjuncts in boil kettle shouldn't affect pre-boil gravit

Post by jeff »

Otter wrote:Just noticed this on a belgian Tripel recipe. When I added the 2.5lbs of Table Sugar, the pre-boil gravity changed.

I like to use the pre-boil gravity to let me know what I need to collect out of my mash.
Version 1.5.3 addresses this issue by adding a new stage for extracts and adjuncts called "Late Addition (Kettle)". Anything marked as a late addition will not be calculated as part of the pre-boil and will not affect hop utilization calculations. Hope this helps.
Jeff
BeerTools.com Staff
User avatar
jawbox
Imperial Stout
Imperial Stout
Posts: 528
Joined: Fri Oct 27, 2006 1:43 pm
Location: W. Dundee

Post by jawbox »

Jeff,

Could you address how BTP handles adjuncts (sugar, honey etc) that usually ferment out 100%. I think BTP applies the yeast attenuation to these items rather than fermenting them out at 100%.

Thanks.
iMac 27", 3.4 GHz Intel Core i5, 8GB Ram, Mac OSX 10.12.6
iPhone 7+
iPad Pro 10.5
I like macs ;)
User avatar
jawbox
Imperial Stout
Imperial Stout
Posts: 528
Joined: Fri Oct 27, 2006 1:43 pm
Location: W. Dundee

Post by jawbox »

One more question.

Does BTP use the Fine grind or Coarse grind in calculating the gravity contribution from each malt?

Thanks Again
iMac 27", 3.4 GHz Intel Core i5, 8GB Ram, Mac OSX 10.12.6
iPhone 7+
iPad Pro 10.5
I like macs ;)
User avatar
jeff
Imperial Stout
Imperial Stout
Posts: 1602
Joined: Sun Jan 09, 2000 8:16 pm
Location: Hollywood, SC
Contact:

Post by jeff »

jawbox wrote:Jeff,

Could you address how BTP handles adjuncts (sugar, honey etc) that usually ferment out 100%. I think BTP applies the yeast attenuation to these items rather than fermenting them out at 100%.

Thanks.
BeerTools Pro does not predict apparent attenuation. Rather it is entered by the user and left unmodified by BTP when calculating recipe results. The only time BeerTools Pro alters the apparent attenuation is when the user enters a different terminal gravity than what is predicted. Experienced brewers will typically adjust apparent attenuation during the recipe formulation process to account for different yeast strains and varying proportions of highly fermentable adjuncts. Hope this helps clear things up.
Jeff
BeerTools.com Staff
User avatar
jeff
Imperial Stout
Imperial Stout
Posts: 1602
Joined: Sun Jan 09, 2000 8:16 pm
Location: Hollywood, SC
Contact:

Post by jeff »

jawbox wrote:One more question.

Does BTP use the Fine grind or Coarse grind in calculating the gravity contribution from each malt?

Thanks Again
Actually, BTP uses the "as-is coarse grind" to calculate gravity. This value is the coarse grind adjusted for moisture content. Additionally, the AICG depends on DBFG and FG-CG so changing any of these values will affect the others.
Jeff
BeerTools.com Staff
Post Reply