Troubleshooting pH probe calibration issues with the ESS Pro controller from Procopi.

Client :
Hello,

Technical Advisor :
Hello

Client :
I have a Procopi ESS Pro regulator and when calibrating the PH probe with ph 7 and 4 doses, the calibration starts with the first step at PH 7 but when I dip the probe in PH 4, the calibration does not start...

Technical Advisor :
I think you should test your probe like this: https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-

Client :
Do you have any idea why?

Client :
Okay, I'll try and get back to you

Technical Advisor :
👍

Client :
The probe evaluation is moving, so it is working

Technical Advisor :
Can you give me the values?

Client :
It goes from 7.75 to 5.69

Technical Advisor :
If you put the probe in ph4, what value do you read?

Client :
I will check

Client :
It indicates a value of 6.2 (the f