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hanna phep 5 calibration error
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homebrewdude
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hanna phep 5 calibration error
I am trying to calibrate my Hanna ph meter.
I mixed up new solutions of 4.00 and 7.00
I hold on till CAL shows up.
It says "use" 7.01
Then it says "use" "4.01"
After a few seconds it says "WRNG"
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