sdbrew1024
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- Jul 26, 2008
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I recently got a Hanna 98128 pH meter. The first thing I did was try to calibrate the meter. Unfortunately the 7.01 buffer reads 8.5 and the auto-cal won't recognize it. the 4.01 buffer reads about 5.5. I tried several other liquids with known pH values and they all read ~1.5 higher than they should. Is there anything I can do to fix this?