Coldbreak Brewing Giveaway - Open to All!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Calibrate Refractometer with purified water?
Reply
 
Thread Tools
Old 05-24-2010, 10:50 PM   #1
hinke
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: Cedar Park, Texas
Posts: 231
Liked 1 Times on 1 Posts
Likes Given: 1

Default Calibrate Refractometer with purified water?

Can I calibrate my new refractometer with purified water and get good result? Or do I need to go and get some distilled water?


hinke is offline
 
Reply With Quote
Old 05-24-2010, 11:04 PM   #2
Bsquared
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Bsquared's Avatar
Recipes 
 
Join Date: Oct 2006
Location: San Diego
Posts: 1,829
Liked 57 Times on 52 Posts
Likes Given: 22

Default

Quote:
Originally Posted by hinke View Post
Can I calibrate my new refractometer with purified water and get good result? Or do I need to go and get some distilled water?
Use the water you brew with.


Bsquared is offline
 
Reply With Quote
Old 05-24-2010, 11:10 PM   #3
hinke
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: Cedar Park, Texas
Posts: 231
Liked 1 Times on 1 Posts
Likes Given: 1

Default

Aha. Makes sense.

Thanks
hinke is offline
 
Reply With Quote
Old 05-24-2010, 11:12 PM   #4
AZ_IPA
PKU
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
AZ_IPA's Avatar
Recipes 
 
Join Date: Jun 2008
Location: The Cold Part of AZ
Posts: 46,500
Liked 6884 Times on 5846 Posts
Likes Given: 1109

Default

Quote:
Originally Posted by Bsquared View Post
Use the water you brew with.
Quote:
Originally Posted by hinke View Post
Aha. Makes sense.

Thanks
not true.

You want your refractometer to read 0.0 using distilled water.
AZ_IPA is offline
 
Reply With Quote
Old 05-24-2010, 11:21 PM   #5
Shooter
Almaigan Brewing Co.
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Shooter's Avatar
Recipes 
 
Join Date: Dec 2008
Location: Dublin (No, not that Dublin)
Posts: 4,511
Liked 249 Times on 194 Posts
Likes Given: 38

Default

Purified water will probably be fine. You don't want the water to throw off the calibration so far that it's effecting your reading. I suppose it depends on how purified, but, I would think, it's a matter of close enough. If I use distilled water to calibrate and then measure water out of my water purifier, the reading is about the same.
__________________
Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience. - C. S. Lewis, English essayist & juvenile novelist (1898 - 1963)
Shooter is offline
 
Reply With Quote
Old 05-24-2010, 11:30 PM   #6
hinke
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: Cedar Park, Texas
Posts: 231
Liked 1 Times on 1 Posts
Likes Given: 1

Default

I'll just pick up some distilled water then.

I ended up with one that is 0-40 brix atc. They ran out of the 0-32, so I got this one for the same price, $26.
hinke is offline
Brewskey Likes This 
Reply With Quote
Old 05-25-2010, 12:25 AM   #7
HairyDogBrewing
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2008
Location: Mechanicsburg, PA
Posts: 580
Liked 5 Times on 5 Posts

Default

My brew water reads 0.0005 (half a gravity point) higher than distilled water on my hydrometer.
Both read exactly the same on the refractometer.

I don't bother to correct for it.
I'm not sure how much of the minerals end up in the trub anyway.
HairyDogBrewing is offline
 
Reply With Quote
Old 05-25-2010, 02:38 AM   #8
hinke
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: Cedar Park, Texas
Posts: 231
Liked 1 Times on 1 Posts
Likes Given: 1

Default

Well, the purified water (nestle), reads the same as regular tap water. I'll get some distilled water just to make sure it is calibrated completely.
hinke is offline
 
Reply With Quote
Old 05-25-2010, 04:56 AM   #9
Catt22
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Posts: 5,000
Liked 62 Times on 59 Posts
Likes Given: 51

Default

Tap water, purified water, RO water and distilled water all read exactly the same on both my refractometer (zero) and my hydrometer (1.0000). I guess none of them contain much sugar.
Catt22 is offline
 
Reply With Quote
Old 05-25-2010, 05:41 AM   #10
gxm
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2008
Location: Portland, OR
Posts: 556
Liked 7 Times on 6 Posts
Likes Given: 1

Default

My Portland tap water is nearly mineral free, so I just calibrate my hydrometer & my refractometer with the same tap water that I brew with.

However, I am curious about this theoretically.
I can certainly understand wanting instruments to be accurate (as well as precise) to a known standard, however, when I measure the RI or gravity, I want to measure the extract I added to the water, not the minerals in the base water.

Say that my tap water gives an RI of 0.2 with a refractometer calibrated with distilled water.
Would I then subtract 0.2 from all your RI readings to get the actual extract I've added? Would that be any different from just calibrating with the tap water at 0?


gxm is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
PSA: Calibrate your refractometer EricCSU All Grain & Partial Mash Brewing 16 03-25-2013 11:09 AM
Boiled Water VS Purified Water tglo1961 General Techniques 5 04-18-2010 06:26 PM
How often do I need to calibrate my refractometer? zzyvba Beginners Beer Brewing Forum 11 10-30-2009 02:01 PM
distilled water vs. purified water MaynardX General Beer Discussion 9 03-12-2009 03:51 PM
purified, distilled, spring, or other? MikeInCtown Recipes/Ingredients 8 10-27-2008 05:01 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS