Hi All,

I have recently upgraded to a GHL Profilix 4 and installed a PLM-PH-Redox-DigTemp expansion card to enable redox readings, so i can control my ozone.

After installing and calibrating it is showing my Redox Mv at between 700-800. This abnormally high, so not sure why it is showing what it is.

It is connected into the bottom connector on the expansion card, and I have calibrated twice now.

Any ideas on how to make this ready accurately?

Thanks