Hi
the last ProfiLux firmware updates didn't deal in any way with the sensors, we had no other complaints, so I must rule out that there is any relation to the firmware update, I guess a coincidence.
No, there is no special order to do a calibration and the sensors dont affect each other, all sensor control ciruits are strictly separated.
So it does not matter when you calibrate which one.
In the screenshots I see very suspicious calibration values, the ADC1 and ADC2 of each probe have nearly the same value and the value are all too low.
With these wrong calibration values ProfiLux is not able to calculate the correct pH value, that's why you see nonsense values like "3.00"
This shows either:
- wrong calibration process
- defective probe - probes have a lifetime of 6 ... 24 months, depending on the environment, can be shorter if the probes dried out
- defective pH-port in the ProfiLux - but I doubt that, this is very rare, and I can't imagine that 2 ports are dead at the same time
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