Just got home and started to do a WC. I noticed a 9 in the corner of my left eye............when I took the vision straight it was a 9.2 on my PH reader OMG!!
Started to do a manual test and it told me 8.18 and an other one.......8.22...........once again 8.19............What's going on with my American Marine PH Pinpoint?
Yes, the probe is only 6 months and Yes I clean it every 3 months and Yes I did a 7.00 and 10.0 calibration on it before use.
I guess will test the calibration on it after I found my solution bags.