Randy Holmes-Farley
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So for clarification, did you calibrate this refractometer with RO/DI or a 35 ppt standard?
Calibration with an "off" standard could also explain things. For example, if someone bought it, used some, replaced it with water, and returned it to the store.
Calibration with an "off" standard could also explain things. For example, if someone bought it, used some, replaced it with water, and returned it to the store.



