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Old 02-06-2009, 09:35 PM   #1
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Smile Refractometer Question!

Hey guys just got in my Refractometer from Marine Depot. One Question and it's probably the dumbest one ever but When it says to add Distilled Water? Is that the same thing as RO/Di water?
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Old 02-06-2009, 09:38 PM   #2
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Technically distilled water hasn't gone through the reverse osmosis process, so technically it is different.

However, for the reason of calibration, which is what the thing wants you to do, RO/DI is fine.
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Old 02-06-2009, 09:39 PM   #3
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It's asking you to put distilled water on the glass and set it at zero. That calibrates it.
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Old 02-06-2009, 09:43 PM   #4
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yeah But i don't have Distilled water. Will RO/DI water work?
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Old 02-06-2009, 09:59 PM   #5
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Yes, it will work
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Old 02-07-2009, 07:03 PM   #6
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Keep in mind now you only have it calibrated at 0. I highly suggest you get a bottle of Pinpoint calibration fluid so you can calibrate it at 35 ppt.
My refracto reads slightly under 0 with RO when calibrated at 35 ppt.
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Old 02-09-2009, 12:11 PM   #7
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I agree with Larry, get something that you know should be at 0 and go from there.
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Old 02-09-2009, 12:44 PM   #8
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Quote:
Originally Posted by ccCapt View Post
Keep in mind now you only have it calibrated at 0. I highly suggest you get a bottle of Pinpoint calibration fluid so you can calibrate it at 35 ppt.
My refracto reads slightly under 0 with RO when calibrated at 35 ppt.

I am not understanding? 35ppt? What the heck is that?
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Old 02-09-2009, 01:02 PM   #9
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35 ppt = 1.026 sg
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Old 02-09-2009, 02:43 PM   #10
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Ah... DUH!!!! Now I see what your saying....
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