PH calibration

Mr Milt

New member
Hello everyone, I am have some problem calibrating my probe. When I use the 7 solution it reads 746 and it will not go any lower, the same goes for the 10 solution I get a reading of 1046.
What can I do to fix this and why is it off this much.
 
Don't worry about the specific value displayed at each stage of the calibration. When the value stabilizes and remains steady, then move on to the next step.... the exact value it stabilizes at is unimportant to you. The controller will use the resultant values for computing the calibration offsets.
 
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