Cannot connect 2nd PH probe

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Don`t forget to enable the second pH-probe under the "extras->display" settings.

Matthias, I tried that and there was no setting for PH probe 2. Also checked under "system", in the software controller, and it only shows sensors 1-4:
PH-sensor 1
Temp-sensor 2
Conductivity- sensor 3
Redox-sensor 4

Could it be that the Profilux is not reading the Ph card?
Neil