Just got my contoller and I have a question on the Ph calibration.

When calibrating should the 'read value' of the probe settle on the 10 and 7. When I am calibrating the read value will not match the cal reference, although at the end it tells me that it calibrated OK. Is this a problem??

Roger

Hi

Mine never match, what you are aiming for is a stable reading so that your probe/controller can create a corrected value from what it sees to what it should see, ie pH7 or pH10.