Calibration problems with a pH probe: errors and solutions.

Client:
Hello

Technical Advisor:
Hello

Client:
I bought a pH probe for a Klereo Kompact M9 and it's impossible to calibrate it. The value on the screen shows 2.6 in the 7.00 solution.

Technical Advisor:
It's a faulty probe, it happens sometimes. We will send you a new probe on Monday.

Client:
However, I have a doubt, I received a yellow probe... and I see that yellow is for redox (so for salt ??) and pH is blue?

Technical Advisor:
In that case, it's a Redox probe! Yes, pH is blue. It cannot work.

Client:
There must be a mistake then, I ordered a pH probe for Klereo Kompact M9 (or did I order it wrong??)

Technical Advisor:
Anything is possible, I will check your order today and write you an email.

Client:
Okay, thank you, I understand now, I will disconnect everything.

Technical Advisor:
See you soon, have a great day.