Calibrating your pH probe: practical guide and solutions in case of malfunction.

- Categories : Questions about RedOX probes

Client :

Hello, after calibrating my pH probe, it shows up as rC on the display


Technical Advisor :

Hello, test your probe like this


https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-

It's probably the probe


Client :

I rinsed the probe with water, then dipped it in the pH 7 solution, pressed the cal button, and 1 minute later I rinsed the probe and the pH is at 5.1


Technical Advisor :

That doesn't seem good, but do the test like that and you'll know


But usually rC means the probe is out of service