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Old 11/28/2005, 10:56 PM
bertoni bertoni is offline
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Join Date: Mar 2002
Location: Foster City, CA, USA
Posts: 35,743
You need to buy a conductivity standard that's appropriate for the range you want to measure. Hopefully, there are instructions for how to use the solution?

LabSafety.com sells a wide range of calibration standards, and the American Marine PinPoint calibration standard for their low-range meter would be probably be fine as well. I assume you want to check RO-DI water?
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Jonathan Bertoni