are you back??

Yes, did you get my email?

No

According to the tests we did yesterday.

The measurement of standard solutions gives satisfactory results. so this tells us that the probe is measuring correctly. In addition, I see that the measurement reading indicates measurements around 700 which vary slightly, which is completely normal.

What is the second measurement with the ORP meter you are talking about? (if you compare the pool water directly with the measurement of the device, you will always have a very significant difference due to different concentrations of CO2, CHLORINE, etc.)

Please note that ORP measurement is an extremely complex measurement. (Not example in factory when we make you a more exact measurement we use quinhydrone)

The most important thing is to maintain a stable redox level.

on an ORP meter quite precise which gives the same value configured 'on the system

Can you measure calibrated solutions with this device? I understand what you want to do but unfortunately it does not work because this ORP measurement is very volatile.

the standardized solutions give the same value on the device

Yes that's fine . The standard solutions are made to have rather stable measurements but in swimming pool water it is another matter! But that's not as important as that because regulators are designed like that. What we know: The probe measures, The probe is correctly calibrated from this moment on, it works

where do the displayed and erroneous values ​​come from?? an explanation ??

It is not wrong! this is due to the very technology of this measurement. And besides, why would your ORP meter be more precise than the probe with the regulator which is nothing but an ORP meter?

You see that the standard solutions are measured quite correctly in both but in water there is a variation

this is what happens unfortunately; so according to you we drop the displayed values ​​and just rely on the input value of 590mV???

590 is the objective value. Depending on the value read the regulator should do its job

But did you have a problem with your pool water?

No; I have now discovered that the water is balanced whether on the ORP meter or on the test kit

Let it spin! From experience, I know it works like that! What happens sometimes is that the probe no longer works. in this case the redox value no longer moves or goes to 0 mV and your device will go into alarm. or you can do the salt test.

to be safe, I will order an ORP probe and a standard solution of 240 and 470 mV

THANKS . It's always better

I will ask my son (who is now in Paris) to contact you for payment and delivery; I will send you a confirmation email

OK

his name is Mourad

OK

see you soon and thank you

see you soon