Help!! Redox and Salinity Sensor acting strange

[benner]

Hello,
I am having some problems with my redox and salinity sensors. I am using p3 and have the sensors attached to the expansion box. My redox values began to drop drastically until it went into alarm. I don't see any reason why this would happen other than maybe the sensor needs recalibrated. So, I recalibrated the redox probe using 220mv solution. However, now after I recalibrate the redox probe, I continue to get a reading of only around 220mv. My values before were around 450mv. Also, I recalibrated my salinity probe and now I get values around 57.5ms. I used to get a reading of approx. 53ms.,...
I am just curious of what I am doing wrong and why the redox sensor values dropped in the first place. Do I need to reassign devices or sensors?? Help is very much appreciated because I would like to get this figured out.

Thanks,
Ben

[george]

Hi,

where are your sensors placed?

george

[benner]

They are in the ghl probe cell container. This is where they have always been. Never had any issues before.

[thorsten]

I do have Problems with my Redox probe as well!
After I had installed the new Firmware 5.16, I recalibrated the probe with 220mV solution (i tried it several times).
The vaules initially dropped down to 3mV after I placed the probe in the tank water, but now after a day, it reads 999mV??
The probe is also placed in the GHL cell Container.

Was there anything changed with the calibration process with the new Firmware??
Thorsten

[benner]

My orp is now at 317 as of today.....it has been slowly rising again. Is this what happens when recalibrating probe?