Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Cool mash for OG reading?
Reply
 
LinkBack Thread Tools
Old 08-22-2007, 05:47 PM   #1
skifast1
Feedback Score: 0 reviews
 
skifast1's Avatar
Recipes 
 
Join Date: Mar 2006
Location: Lake Zurich, IL
Posts: 311
Liked 3 Times on 3 Posts

Default Cool mash for OG reading?

AG n00b question: After forgetting to take an OG reading on my first AG attempt (d'oh!), I'm getting ready for round 2 with EdWort's Haus Ale. As I'm planning out the steps a question occurred to me: does anyone bother to cool their mash sample for a 'spot on' OG reading, or do ppl just figure 'ah, pretty close to 150 deg' and adjust the OG reading accordingly?

I'd be tempted to just adjust for temp, as the time spent cooling the sample could be used for more productive purposes, say, sampling another homebrew

Thx!

__________________
"Those are my principles, and if you don't like them...well, I have others" --Groucho Marx


Primary: echos
Secondary: Nukey Brown
Keg 1: echos
Keg 2: echos
Bottled: Wind 'er Up Winter Ale

skifast1 is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 07:12 PM   #2
Beerthoven
Feedback Score: 0 reviews
 
Beerthoven's Avatar
Recipes 
 
Join Date: May 2007
Location: Cary, NC
Posts: 2,175
Liked 11 Times on 10 Posts
Likes Given: 2

Default

I always adjust for temp, which I measure with a thermometer. Its easy.

__________________

Primary/Secondary: #109 Rye, #110 APA

Kegged: #106 American Wheat, #107 IPA, #108 Nut Brown

Planned: Red IPA, American Brown

Beerthoven is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 07:17 PM   #3
bradsul
Flyfisherman/brewer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
bradsul's Avatar
Recipes 
 
Join Date: Sep 2006
Location: Ontario, Canada
Posts: 4,908
Liked 22 Times on 20 Posts
Likes Given: 4

Default

When I first started AG brewing I used to take a pre-boil gravity. I couldn't be bothered anymore. I'm very consistently getting at least 80% now so I don't worry about it. If you are going to take the readings though, definitely cool the sample first (just throw it in the freezer, it doesn't take long to cool). The farther the wort is from the calibration temp of the hydrometer the less accurate the reading.

That said I have been considering getting a refractometer. While I'm not so worried about my pre-boil gravity I am concerned about over sparging and extracting tannins.

__________________
Brad
Canadian Brewers Unite!


Projects: Sylvania Kegerator Conversion, Tower Cooling, Grain Milling Station
bradsul is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 07:46 PM   #4
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 2 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,015
Liked 978 Times on 653 Posts
Likes Given: 28

Default

I only take an SG at the tail end of my runnings from the second batch sparge and do so for note taking only. It's mostly to see how well I've done sparging. If the efficiency is low and I noted a 1.020+ reading, I know I could have sparged more to fix that. If it's an off flavor and I noted a 1.010 or lower reading, I might have pulled some tannins. It's just good for troubleshooting.

__________________
BrewHardware.com
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!

New Stuff?
Bobby_M is online now
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 08:16 PM   #5
FlyGuy
Feedback Score: 0 reviews
 
FlyGuy's Avatar
Recipes 
 
Join Date: Jan 2007
Location: Calgary, Alberta
Posts: 3,618
Liked 129 Times on 41 Posts
Likes Given: 7

Default

Quote:
Originally Posted by bradsul
That said I have been considering getting a refractometer. While I'm not so worried about my pre-boil gravity I am concerned about over sparging and extracting tannins.
Brad -- check this out: http://cgi.ebay.com/ws/eBayISAPI.dll...MESE:IT&ih=014
This is the same refractometer and vendor that I purchased. They guy is in Vancouver and charges reasonable shipping. The unit works flawlessly, and it is REALLY convenient. You definitely won't regret it!
__________________
Cheap 10 gal cooler MLT$3 AutosiphonAluminum Pot FAQEasy Steam Injection Mash SystemMake a Frozen Yeast Bank
Improving Stovetop Boiling Improving AG Efficiency
FlyGuy is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 08:19 PM   #6
BierMuncher
...My Junk is Ugly...
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
BierMuncher's Avatar
Recipes 
 
Join Date: Jan 2007
Location: St. Louis, MO
Posts: 12,176
Liked 581 Times on 342 Posts
Likes Given: 213

Default

Maybe I'm a little too comfortable. I don't take a reading until I'm racking out of the cooled kettle into the primary. What's done is done and I just want to get a mark for ABV readings later on.

__________________

*******
Check Out My Rolling Kegerator

BierMuncher Tried & Trues:
Tits-Up IIPA (3-Time Medalist), Black Pearl Porter, Kona Pale Ale, Outer Limits IPA, Centennial Blonde (4.0%), Nierra Sevada (SNPA), SWMBO Slayer Belgian Blonde,

BierMuncher is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 08:25 PM   #7
desertbronze
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2007
Posts: 385
Liked 3 Times on 3 Posts
Likes Given: 1

Default

I just place a cup of wort in a bucket of cold water. Take a reading when the wort has cooled to 60 or so - just for curiosity. Doesn't take too much effort - but I agree with BierMuncher - what's done is done. I just go with whatever the gravity is - I don't try to adjust it with water or extract.

__________________
desertbronze is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 08:41 PM   #8
FlyGuy
Feedback Score: 0 reviews
 
FlyGuy's Avatar
Recipes 
 
Join Date: Jan 2007
Location: Calgary, Alberta
Posts: 3,618
Liked 129 Times on 41 Posts
Likes Given: 7

Default

I tend to do the same (not bother until I am done), but there is something to be said for knowing your efficiency before you go into the boil.

If you have a new system or your process isn't very repeatable, you really want to know whether you significantly under-shot or over-shot your mash efficiency. If you did, it is going to affect your hop utilization and your bitterness-to-gravity ratio, which is one of the most important taste aspects of your finished beer. If you have an idea that your are above or below concentration of fermentables going into the boil kettle, at least you then have the opportunity to re-calculate your hop utilization and predicted IBU's, and then make last-minute corrections to your hop additions, if required.

__________________
Cheap 10 gal cooler MLT$3 AutosiphonAluminum Pot FAQEasy Steam Injection Mash SystemMake a Frozen Yeast Bank
Improving Stovetop Boiling Improving AG Efficiency
FlyGuy is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 08:43 PM   #9
Brewsmith
Feedback Score: 0 reviews
 
Brewsmith's Avatar
Recipes 
 
Join Date: Aug 2005
Location: Torrance, CA
Posts: 6,259
Liked 31 Times on 29 Posts

Default

I take a cup or so out of the end of the boil with a pyrex cup and put it in the fridge. When everything is pitched, cleaned and put away the sample is under 80 and ready to go for measurement and tasting.

__________________
Fermenting:#160 Apollo/Calypso Pale Ale
Kegged:#153 Old Helicon Barleywine 2013, #157 Irish Red, #158 Mosaic IPA, #159 Bravo/Delta ESB
Up Next:Brown Porter, American Stout, Imperial Stout
My Recipes
Tuba Sonata

Smith & Co. Custom Tap Handles
Brewsmith is offline
 
Reply With Quote Quick reply to this message
Old 08-22-2007, 08:46 PM   #10
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 2 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,015
Liked 978 Times on 653 Posts
Likes Given: 28

Default

Like I mentioned, I don't test in order to compensate. I just do it to compare my sparge methods for learning purposes.

__________________
BrewHardware.com
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!

New Stuff?
Bobby_M is online now
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
2 or 3 gallon boils - cool all 5 gallons or cool boil first? pcrawford Extract Brewing 15 01-31-2013 12:47 AM
Priming Solution: To Cool or Not To Cool Pelikan General Techniques 17 04-07-2009 12:49 AM
Cool That Wort!! Cool That Wort!! What Works For You? shagington All Grain & Partial Mash Brewing 37 10-20-2008 07:29 PM
Partial Mash Temperature Reading dipflop All Grain & Partial Mash Brewing 3 07-17-2008 05:12 PM
Cool Box Mash Tun BlightyBrewer All Grain & Partial Mash Brewing 19 03-01-2006 07:26 AM