Ph and Redox. ..

Elder1945 · Jan 22, 2018

The P4 is working amazing right now and I am just finishing up programming and messing around with things.

I am however having a issue with the PH probe and Redox Probe.

My PH swings from 10.50 to 4.0? When I calibrate in the 7.0-9.0 if I leave the probe in the 9.0 lets say it drifts all over the place 9.5, 8.5, 9.3 and so on.

As for the Redox it reads -200 then when calibrated reads 1000..

I assume I am doing something wrong but have calibrated a few time now with the same results... Any ideas?

Temp and Salinity working great.

Support@GHLUSA · Jan 23, 2018

Hmm. Odd. A couple things that come to mind to check:
* stay voltage
* cable routing, near power supplies, parallel to power cables, near drivers, ballasts etc.

Elder1945 · Jan 23, 2018

Marco@GHLUSA said:
Hmm. Odd. A couple things that come to mind to check:
* stay voltage
* cable routing, near power supplies, parallel to power cables, near drivers, ballasts etc.

If it was stray voltage would this affect the Salinity probe? as this is rock solid.. I will double check if there is any voltage in the tank though.

The cable routing might be a issue due the the amount of electronics on the tank. I will dive into this tonight.

Support@GHLUSA · Jan 23, 2018

Elder1945 said:
If it was stray voltage would this affect the Salinity probe? as this is rock solid.. I will double check if there is any voltage in the tank though.

I was thinking the same, but just never know. I've never tested myself TBH.