pH measurements: stability and variation test

A pH stability and variation test may be necessary when an anomaly in the pH measurements is detected. When is this test required? When the pH measurements are highly inconsistent, vary greatly or, on the contrary, seem to be blocked or vary very little after the addition of products. Before carrying out the pH stability and variation test, you should first check the TAC (Total Alkalimetric Titration) - Alkalinity of your pool water with the help of your swimming pool professional. If the TAC is within the norm (between 80 and 150 mg/L), the pH stability and variation test will check that your appliance's sensor is working properly.

Carry out the pH stability and variation test

Stage 1: Initial pH measurement

For this step, your mobile phone must remain close to your ICO to activate the Bluetooth connection.

• Choose a clean bowl (or little flat-bottomed container)
• Open a bottle of still mineral water with a pH of between 6.5 and 8.
• Pour about 25cl of mineral water into the bowl. The probes should be immersed.
• Unscrew the bottom part of your ICO to access the probes.
• Place ICO in the bowl.
• In your ICO application, click on the remote control button on the bottom right.
• Then click on the Restart button at the bottom of your screen
• Note the exact time, then wait 15 minutes until ICO has taken at least 2 measurements.
• NB: If the aim of the test is to check the stability of the measurements, then please leave it running for at least 6 hours before moving on to the next step.

Step 2: pH measurement after product addition

Keep your phone close to your ICO to perform this step.

• Add 1g of pH+ or pH- granules (as available) to the same water.
  • If you don't have a kitchen scale, a level teaspoon is equivalent to 5g.
• Mix the product until the granules have completely melted.
• Dip ICO back into the water
• Click the restart button on your application's remote control page
• Note the precise time and wait 15 minutes until ICO has taken at least 2 measurements. 

Understanding test results

1. If you find that the pH readings vary by at least 2 points on average between the first and second stages (from 6.5 to 8.5, for example), the pH sensor is working normally and the readings are not blocked. You can, however, calibrate your pH sensor if you have any doubts.
2. If the two measurements vary little between these two tests, please contact our support department. If you already have a ticket in progress, please reply to the last email you received, stating the times at which you carried out the tests. Our team will then be able to analyze the results and provide you with a solution.