Hi,

I have an alarming situation with my PH readings through Profilux and ProfiluxControl -program. ProfiluxControl is showing PH as 10,5 (when connected with usb cable to pc) and profilux is showing 5,15 (when not connected to pc). I have tested the PH-probe in RO/DI water and the reading was around 7,4 (I saw the figure change, when connected to pc). The PH-probe has been calibrated many times and still the same problem continues. Also, when displaying the measurement data, it shows strange staright line from the days I have not connected the profilux to my pc... Something must be off and not right. What to do?

ProfiluxControl 5.1.7.2
Profilux firmware 5.17

measurements2.JPG

measurements1.JPG