Discussions on the calibration and replacement of a three-year-old pH probe.

Client:
Can a three-year-old probe be calibrated?

Technical Advisor:
Yes

Client:
Thank you

Technical Advisor:
But first, we need to know if it is functioning. Do you have a pH or Redox probe?

Client:
pH

It works but the display keeps changing.

Technical Advisor:
Do this test: https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-

Based on what you're telling me, you have a tired probe. A pH probe is like a battery and when it's discharged, it gives unstable values.

Client:
Thank you, I think I will replace it.

Technical Advisor:
Still, do the test, I have probes that last 2 years and others that last 10 years... I know the subject but I can't explain everything. What controller do you have?

Client:
Hayward

Technical Advisor:
Which model?

Client:
EZ pH

Technical Advisor:
For probes, that's pretty good.

Here, our pH probe is this one: https://ph-redox-pool.com/gb/hayward/92-pH-Probe-for-Hayward-EZ-Chem.html

Client:
Do I need to calibrate the new probe or is it unnecessary?

Technical Advisor:
Yes, because it's not possible as calibration depends on your device. However, they are measured.

Client:
With what solution?

Technical Advisor:
From memory, pH7. https://sonde-ph-redox-pisc