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#1 |
Registered Member
Join Date: Aug 2008
Location: Mandeville, LA
Posts: 76
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How to calibrate a refractometer using calibration fluid?
I bought a refractometer from Dr. Fosters and I also bought the Pinpoint 53.0 µS Calibration/Reference Fluid. The directions that came with the refractomeeter said that you can use either distilled water or calibration fluid. I decided to use distilled water because I was not sure how to calibrate it using the calibration fluid. I read in a few places that it is better to use the calibration fluid rather than distilled water.
The calibration fluid did not come with any directions, so what level should I be looking for when calibrating with it? Thanks. |
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#2 |
Registered Member
Join Date: Apr 2007
Location: N41.48070-W72.65107
Posts: 690
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35ppt
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"The Sea once it casts its spell, holds you in its net of wonder forever" ~Jacques Cousteau~ Current Tank Info: 180 gal reef w/40gal/fuge.225 lbs LR 150 Lbs LS, H&S skimmer,MTC mini cal reactor, AC3 |
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#3 |
Registered Member
Join Date: Mar 2008
Location: OH
Posts: 1,094
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There was an article on here about that, so feel free to double check this:
It should be 1.026 SG / 35 ppt
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Michelle Current Tank Info: 30G FOWLR Clownfish tank soon to be replaced by JBJ 28 Gallon Nano |
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#4 |
Registered Member
Join Date: Aug 2008
Location: Mandeville, LA
Posts: 76
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So I should put the calibration fluid on my refractometer and use the screw driver (if necessary) to tweak it until it reads 35 ppt/1.025?
How often should you have to check the calibration? |
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#5 |
Registered Member
Join Date: Mar 2008
Location: OH
Posts: 1,094
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35 ppt/ 1.026 not 1.025
I check the calibration every time I make a new batch of water, but maybe I'm overly cautious.
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Michelle Current Tank Info: 30G FOWLR Clownfish tank soon to be replaced by JBJ 28 Gallon Nano |
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#6 |
Registered Member
Join Date: Apr 2007
Location: N41.48070-W72.65107
Posts: 690
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So I should put the calibration fluid on my refractometer and use the screw driver (if necessary) to tweak it until it reads 35 ppt/1.025?..................yes...make sure the water is @ 78 degrees,your readings will change with temp fluctuations, i do 4 water changes a month and check the calibration monthly
__________________
"The Sea once it casts its spell, holds you in its net of wonder forever" ~Jacques Cousteau~ Current Tank Info: 180 gal reef w/40gal/fuge.225 lbs LR 150 Lbs LS, H&S skimmer,MTC mini cal reactor, AC3 |
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#7 |
Registered Member
Join Date: Mar 2008
Location: OH
Posts: 1,094
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Oh, that's a good point. Did you get a refractometer with ATC?
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Michelle Current Tank Info: 30G FOWLR Clownfish tank soon to be replaced by JBJ 28 Gallon Nano |
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#8 | |
Registered Member
Join Date: Aug 2008
Location: Mandeville, LA
Posts: 76
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Quote:
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#9 |
Registered Member
Join Date: Jan 2006
Location: Metairie, LA
Posts: 810
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i was told i can calibrate my refractometer with RO/DI water.
is that true? |
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