Coldbreak Brewing Giveaway - Open to All!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Site Glass Calibration and Temperature
Reply
 
Thread Tools
Old 02-28-2011, 09:31 PM   #1
rockytoptim
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
rockytoptim's Avatar
Recipes 
 
Join Date: May 2009
Location: Livonia, MI
Posts: 817
Liked 94 Times on 75 Posts
Likes Given: 3

Default Site Glass Calibration and Temperature

I just got Bobby M's site glass installed and I need to calibrate it. Do you guys use mash temperature water to do initial calibration on the site glass or do you just use room temp. Or am i worrying too much about the volumetric change of water as the temp increases?


__________________
On Tap: Bee Cave Robust Porter
On Tap: Bee Cave OktoberFest
On Tap: Bee Cave Kolsch
Primary: None
Up next: ????
rockytoptim is offline
 
Reply With Quote
Old 02-28-2011, 09:41 PM   #2
BendBrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2010
Location: Bend, Oregon
Posts: 3,169
Liked 75 Times on 58 Posts
Likes Given: 23

Default

I use water out of my cold water tap as that is what I start every brew with.


BendBrewer is offline
 
Reply With Quote
Old 02-28-2011, 09:48 PM   #3
Misplaced_Canuck
HBT_LIFETIMESUPPORTER.png
Feedback Score: 1 reviews
 
Misplaced_Canuck's Avatar
Recipes 
 
Join Date: Jan 2011
Location: NE Columbia SC - Formerly, Montreal Canada
Posts: 2,835
Liked 155 Times on 127 Posts
Likes Given: 51

Default

I use tap water too.

Interestingly enough, I was heating up sparge water in a very full 5-gallon pot.... When the water got to around 150F, the pot started overflowing onto my turkey fryer!

M_C
__________________
Quote:
Originally Posted by Misplaced_Canuck
Carbonic bite? Is that like the bubonic plague?
Quote:
Originally Posted by ebstauffer
Needless to say after more than a few drams my mental efficiency matched my mashing efficiency.
Misplaced_Canuck is offline
 
Reply With Quote
Old 02-28-2011, 09:51 PM   #4
MalFet
/bɪər nərd/
HBT_LIFETIMESUPPORTER.png
Feedback Score: 1 reviews
 
MalFet's Avatar
Recipes 
 
Join Date: May 2010
Location: NYC / Kathmandu
Posts: 8,348
Liked 1303 Times on 870 Posts
Likes Given: 609

Default

The density difference between room temperature water and near-boiling water is about 3%, so you can use that as a guide to determine if your system is precise enough to warrant being concerned about temperature when measuring volume.

If you do decide it is important, then the next question is, When are you using the sight-glass markings to measure your volume? If you are using them exclusively to measure the cold water you pour in like BendBrewer, then use cold water. If you are using them exclusively when the water is hot, calibrate on hot water. If you are doing both, you'll have to get creative

I've never worried about it that much to be honest. There are always other, larger sources of error in my system.
MalFet is offline
 
Reply With Quote
Old 02-28-2011, 09:53 PM   #5
BendBrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2010
Location: Bend, Oregon
Posts: 3,169
Liked 75 Times on 58 Posts
Likes Given: 23

Default

I do kinda like the OP's thought process though. If putting a sight glass on an MLT, use 150ish degree water and near 180ish if putting it on the kettle.

I just measure my strike and sparge water and deal with the volumes that I get after that. I know about what 13 gallons looks like in the kettle.
BendBrewer is offline
 
Reply With Quote
Old 02-28-2011, 10:12 PM   #6
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 3 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,700
Liked 1263 Times on 833 Posts
Likes Given: 34

Default

Interesting question that I hadn't even thought of before. The reason I haven't thought of it is that beer tools pro, the software I use, compensates the water measurements due to temp expansion and contraction. I agree with Bendbrewer in that if this is your also your HLT that will receive the cold water, you'd want that measurement to be correct. If it doubles as your BK, just know that you're shooting for a final volume about 1 quart higher than your finished batch.
__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
July 4th Sale, $20 off plate chillers through July 4th.
Bobby_M is online now
 
Reply With Quote
Old 03-01-2011, 12:32 AM   #7
rockytoptim
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
rockytoptim's Avatar
Recipes 
 
Join Date: May 2009
Location: Livonia, MI
Posts: 817
Liked 94 Times on 75 Posts
Likes Given: 3

Default

Thanks for the replies. My sight glass is on my BK so the sight glass would be to measure water from MLT to BK so I will calibrate it at 160 to 170.
__________________
On Tap: Bee Cave Robust Porter
On Tap: Bee Cave OktoberFest
On Tap: Bee Cave Kolsch
Primary: None
Up next: ????
rockytoptim is offline
 
Reply With Quote
Old 03-01-2011, 02:48 AM   #8
Scut_Monkey
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pittsburgh, Pennsylvania
Posts: 2,685
Liked 13 Times on 13 Posts

Default

Wow I didn't know it varied by 3%. I still have to calibrate mine. I'm thinking I'll do ~70 degrees to be accurate with the water I initially add and then after chilling. That will keep my efficiency calculations accurate.


Scut_Monkey is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cleaning Your Site Glass jakecpunut Equipment/Sanitation 3 11-15-2010 04:47 PM
BCS-460 Users - Temperature Probe Calibration? Douglefish Equipment/Sanitation 4 09-10-2010 10:31 PM
best site glass and how to get it really low Datchew Equipment/Sanitation 6 05-23-2010 02:48 PM
Brew Kettle Site Glass Cleaning Tip EdWort Equipment/Sanitation 4 07-10-2009 04:30 PM
Glass and temperature change. Orfy Equipment/Sanitation 3 02-07-2007 03:32 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS