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Hello, I have a Pacific Sea system for measuring PH. My probe does not give me the correct PH. I did the water/vinegar test and it works. Can you tell me what products I need to buy to calibrate / calibrate the probe? Thanks in advance.

Hello

Wait a moment, I have to look at the notice

Thank you.

https://ph-redox-pool.com/gb/pool-buffer-calibration-solution/617-ph7-buffer-calibration-solution.html

Thank you.

How do you know the pH measurement is incorrect?

It has been manually tested.

It is correct in the manual test and my probe tells me that it is at 9 then goes down to 8 and then goes up.

Ok, that's a tired probe! the pH value is no longer stable

Is it better to replace it?

I think because what you are describing corresponds to this. Try this: soak the probe in tap water and watch the value displayed! and come back every 15 minutes and see if the value moves

OKAY. I had done the test indicated on your site. It was about 10 in tap water and then I added vinegar and it came down to about 6.

Ok, 10 is curious! try to do a dummy calibration using tap water. Dip the probe in tap water and calibrate as if it were pH 7

OKAY. Thank you. I will do that, and I will come back to you if it is necessary to buy a new probe.

okay

Good evening.

You are welcome, do not hesitate to contact us! Have a good day