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Calibration (1 Viewer)

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cliner

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I need to calibate my refrac. I was going to buy a calibration solution 342 ppt. Does someone make their own, or have any tips?
 
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cliner

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Yes, I have been doin that for a few years. But, I would like to calibrate at the normal 34-35 ppt range. Is it that critical?
 
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