i just got mine today and went to calibrate it, but only had a hole in the back no set screw? so i took the back off to find the adjustment on the board, but my problem was after calibrating it, i put the prob in my tank and it read 11.4 ph "oh no" now i know that's wrong, so i recalibrated and it still read 11.4. so i pulled out the old pinpoint ph monitor calibrated it put it in the tank and read 7.3ph then did a chemical test ya it''s 7.3 ??? now just so you know the prob that came with the milwakee arrived dry so i was thinking this might be a problem, but after reading some info thy say to soak it in a solution to activate it again but it still read 11.4, so just to see were the problem was i swapped the probes and the milwakee prob worked fine on the pinpoint and read 7.2 so i put the pinpoint prob on the milwakee sm122 and it read 7.2, so if any one can tell me what the heck (not what i really said) this kind of thing bugs the hell out of me.
