I’ve had my KH director for over 3 months and now I’ve got a new problem, 2 days ago it gave me a measurement of 4dkh and has continued to give this result in 8 subsequent measurements. My actual value is 7.5dkh as measured by my hanna. I have now flushed the cell, reagent line, emptied the chamber, recalibrated the ph probe and all dosing pumps and the waste pipe is not below the surface. The reagent bottle is full, there are no kinks or blockages in any lines. This is the last thing I need on top of 3 months of trying to get rid of bubbles in the reagent... and not trusting it enough to automate dosing.... any ideas before I take a hammer to this useless thing!!!!!!