if u no ur tap water is 7 use that 2 calibrate u tester an calibrate 2 7! lol
BoomBoom82 Reviewed by BoomBoom82 on . ph calibration need help asap I've just went to calibrate my ph tester and its all over the place, this is the first digital ph tester i've had though and the instructions were crap and didn't give you much info on what to do with it. with the buffers, do you only use them once to calibrate it then chuck them and use new solution or what? I'm trying to calibrate it and its not givin me the right readings, eg i used the lower ph solution, calibrated then done the higher one and calibrated that, tried it on tap water and Rating: 5