Aqua Rite pro pH control

[Steve_G]

Hope this is in the right section!
I have an automated pH control linked to the Hayward Aqua Rite. If I use a pH 7.0 buffer to calibrate the probe, I reads 7.6. If I adjust it down by more then 0.2 and confirm the setting (using the calibration wizard in the Aqua Rite) I get an error light and pH calibration error message.
I am trying to contact Hayward, but has anyone come across this as well?

[Teapot1]

Probes do wear out, so hopefully you'll hear back from Hayward.
If you lower your Alkalinity to 50-60ppm you wont get pH rises.

[Steve_G]

I don't think that the probe is too bad. It does respond to pH change. All attached meters (and the Aqua Rite is doing that in this case) need calibration. It adjusts fine in the setup system, but then generates faults if the calibration goes beyond a certain amount. Hope Hayward get back to me, if it does need a new probe they're expensive!

Hard to get alkalinity low, I live in a very hard water area. In any case, the electrolysis causes a slow rise in pH so I do need to check and adjust, just the auto system makes it easy!

[Teapot1]

Hard to get alkalinity low, I live in a very hard water area. In any case, the electrolysis causes a slow rise in pH so I do need to check and adjust, just the auto system makes it easy!

Please dont confuse hardness with alkalinity.
The water in my area is also very hard and high in alkalinity. I have however reduced the alkalinity to around 50ppm and havent used any pH down in years. I have set up a test rig years ago along with some others trying this around the world and we know low alkalinity will keep the pH far more stable than the industry stated values that attempt to buffer the pH around 8.1, great for sales of pH-.
Hope Hayward get back to you and if you would be kind enough to let us know the result.

[Steve_G]

Still no reply from Hayward.
However have been trying a few things and come to the conclusion that the probe is not working within parameters. So time for a new one or revert back to manual checking!

The water round here runs through jurassic limestone, so high in carbonates etc. I have made efforts to get the levels down and seem to have succeeded; just had an analysis done and comes out at 58ppm. I won't try to increase it as advised by the pool shop.

Will update if Hayward get back to me.

[Teapot1]

That should help stabilise the pH, now fingers crossed for Hayward.
Have you tried a gentle clean of the probe, I was once told by a manufacturer to stand a pH probe in strong cold coffee for a few hours and brush lightly with a toothbrush (the wife won't mind ).
Or it could have been clothes detergent but I think that was for ORP probes.