Electric Brewing Supply 30A BCS Giveaway!


Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Gravity questions
Reply
 
LinkBack Thread Tools
Old 06-18-2008, 04:47 PM   #1
nyer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2007
Location: Merritt Island, Florida
Posts: 831
Liked 6 Times on 5 Posts

Default Gravity questions

I've searched and searched and read tons of old posts and still can't find an answer to my questions.

I have always checked the OG after I cooled and poured into the primary. I'm thinking it might be better to take a hot sample from the boil and cool it to check OG so that I could fix it if it's too high or too low. I don't know how to fix it though.

What do you do if your gravity reading after the boil is too high or too low? Is there a way to fix either problem?

__________________
nyer is offline
 
Reply With Quote Quick reply to this message
Old 06-18-2008, 05:20 PM   #2
TheJadedDog
AFK ATM
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
TheJadedDog's Avatar
Recipes 
 
Join Date: Aug 2006
Location: People's Republic of Cambridge
Posts: 3,323
Liked 6 Times on 6 Posts

Default

I tend not to worry too much about hitting my OG dead. You are taking the reading at the appropriate time by waiting until you cool the wort and have it in primary, and you are right, there is not much you can do to fix it.

If you are using extract (which I suspect you are), it is pretty difficult to miss your OG by a significant amount unless you are doing something wrong in your process or not measuring your extract well. If you are consistently getting low or high readings you may not be mixing your top-off water thoroughly before taking a reading. The heavier gravity wort tends to sink to the bottom, so readings from the top come out low and those from the bottom come out high.

Also, a slight variation between what the recipe says the OG should be and what it actually is is not uncommon (ie. recipe calls for 1.014 and you get 1.012). This is because the recipe is not taking into account all the variables that occur in your kitchen.

__________________
And now we go AG!

On Tap: Nadda
Primary: Nadda
Planning: Extra Special Bitter
TheJadedDog is offline
 
Reply With Quote Quick reply to this message
Old 06-18-2008, 05:21 PM   #3
wildwest450
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2007
Posts: 9,099
Liked 166 Times on 151 Posts
Likes Given: 4

Default

Quote:
Originally Posted by nyer View Post
What do you do if your gravity reading after the boil is too high or too low? Is there a way to fix either problem?
You can dilute it with water if it's to high or you could add some dme if it's to low, I wouldn't sweat it a couple of points either way.
__________________
wildwest450 is offline
 
Reply With Quote Quick reply to this message
Old 06-18-2008, 05:55 PM   #4
nyer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2007
Location: Merritt Island, Florida
Posts: 831
Liked 6 Times on 5 Posts

Default

I was wondering what to do if it somehow is off by quite a bit. Thanks for the answers.

__________________
nyer is offline
 
Reply With Quote Quick reply to this message
Old 06-18-2008, 10:59 PM   #5
TheJadedDog
AFK ATM
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
TheJadedDog's Avatar
Recipes 
 
Join Date: Aug 2006
Location: People's Republic of Cambridge
Posts: 3,323
Liked 6 Times on 6 Posts

Default

How much is quite a bit? As stated earlier, if you are off by a lot and using extract something is going wrong somewhere in your process.

__________________
And now we go AG!

On Tap: Nadda
Primary: Nadda
Planning: Extra Special Bitter
TheJadedDog is offline
 
Reply With Quote Quick reply to this message
Old 06-19-2008, 01:36 AM   #6
malkore
Feedback Score: 0 reviews
 
malkore's Avatar
Recipes 
 
Join Date: Jun 2007
Location: Nebraska
Posts: 6,922
Liked 32 Times on 30 Posts
Likes Given: 9

Default

Quote:
Originally Posted by TheJadedDog View Post
How much is quite a bit? As stated earlier, if you are off by a lot and using extract something is going wrong somewhere in your process.
or just not mixing the partial boil into the top off water.

back on topic, if you really wanna do this the easy way, invest in a refractometer. its more accurate/easier to adjust for higher temperatures, but like Jaded said, you really only need to worry about missing OG on an all grain, or partial mash recipe.

all extract should always be close to the recipes target OG...as extract is 'standardized' for the most part, while all grain has a range of how many gravity points your brewery will extract from a pound of grain.

and, once you learn your brewery, you'll know your effiency, and can simply adjust the grainbill up or down accordingly.
__________________
Malkore
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10
malkore is offline
 
Reply With Quote Quick reply to this message
Old 06-19-2008, 02:35 PM   #7
nyer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2007
Location: Merritt Island, Florida
Posts: 831
Liked 6 Times on 5 Posts

Default

I haven't had the problem while doing extract. I'm in the process of gathering the equipment and knowledge to switch to AG, it's just something I didn't know how to deal with if it happens.

__________________
nyer is offline
 
Reply With Quote Quick reply to this message
Old 06-19-2008, 10:32 PM   #8
malkore
Feedback Score: 0 reviews
 
malkore's Avatar
Recipes 
 
Join Date: Jun 2007
Location: Nebraska
Posts: 6,922
Liked 32 Times on 30 Posts
Likes Given: 9

Default

Quote:
Originally Posted by nyer View Post
I haven't had the problem while doing extract. I'm in the process of gathering the equipment and knowledge to switch to AG, it's just something I didn't know how to deal with if it happens.
my advice: your first few AG recipes, assume you'll get 70% efficiency and plan the grainbill around that.

but know that you may only hit 60-65% and be low on the gravity.

I'm more of a fan of learning what the brewhouse can do, and then try to improve the brewhouse as much as possible, rather than just band-aiding low gravity with DME.
__________________
Malkore
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10
malkore is offline
 
Reply With Quote Quick reply to this message
Old 06-19-2008, 11:55 PM   #9
TheJadedDog
AFK ATM
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
TheJadedDog's Avatar
Recipes 
 
Join Date: Aug 2006
Location: People's Republic of Cambridge
Posts: 3,323
Liked 6 Times on 6 Posts

Default

Quote:
Originally Posted by malkore View Post
my advice: your first few AG recipes, assume you'll get 70% efficiency and plan the grainbill around that.

but know that you may only hit 60-65% and be low on the gravity.

I'm more of a fan of learning what the brewhouse can do, and then try to improve the brewhouse as much as possible, rather than just band-aiding low gravity with DME.
This is basically what my brewing mentor has told me. Over time you learn the efficiency of your set-up, then you can plan your grainbill around that. Just know that it's going to take several brews before you get things dialed in.
__________________
And now we go AG!

On Tap: Nadda
Primary: Nadda
Planning: Extra Special Bitter
TheJadedDog is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
New member with gravity questions! elmetal Bottling/Kegging 9 09-10-2009 08:54 AM
Questions about starting gravity Ishraider Beginners Beer Brewing Forum 1 03-22-2009 02:00 AM
High Gravity Ale Questions kontreren Beginners Beer Brewing Forum 11 10-14-2008 05:18 PM
Gravity and Volume Questions explosivebeer All Grain & Partial Mash Brewing 4 12-29-2007 04:03 PM
Gravity questions cyfan964 Beginners Beer Brewing Forum 2 03-31-2007 07:10 AM