Thread: Hanna calibration kits
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Old 01-11-2015, 03:43 PM
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Quote:
Originally Posted by Myka View Post
I don't think my HI713 PO4 Checker is reading accurately, so I would like to confirm, and I may as well check my HI755 Alkalinity Checker while I'm at it.
Does your 3:00 minute timer come on after pressing C2?
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