BS POOL EVoBASIC - Checking and Maintenance of the Redox Probe; Checking and Maintenance of the Ph Probe

Manual EVoBASIC v.7 79 / 80
Submerge the cell in a hydrochloric acid solution, or use a commercial
product to clean electrolysis cells (CELLCLEAN). Do not use sharp objects
that could damage the titanium coating of the electrodes.
5.2- Checking and maintenance of the Redox probe
Select Menu , and Man. Chl.
Adjust the chlorine to 0%. Go back to the display screen.
Rinse the probe carefully in clean water.
Insert the probe into a 465mV standard solution and stir gently. Observe
the voltage on the label, which corresponds to the ambient temperature
at that time. Wait for the reading of the ORP value displayed on the
screen to stabilize.
Check that the value does not differ by more than about 10 mV of the
value indicated on the label. If the value is incorrect, it can be attempted
to regenerate the probe by cleaning it. In any event, annual cleaning is
always advisable.
Stir the probe in a glass of water, in which a spoonful of dishwashing
detergent has been mixed. Rinse well in clean water.
Mix a commercial brand of hydrochloric acid at 23% in a glass, with four
times its volume of water. Leave the probe in the solution for a few
minutes, stirring from time to time.
Thoroughly clean the probe in pure, preferably distilled water. Shake the
probe to remove the water.
Recheck the value of the probe. A probe that gives an error lower than
around 30 mV can continue to be used provisionally while it is replaced.
Never leave the probe outside. If the probe has been dry for a time, it
can be regenerated with the hydrochloric acid solution.
5.3- Checking and maintenance of the pH probe
It is recommended to clean and check the probe at least once a year.
Stir it in a glass of water in which a spoonful of detergent has been
dissolved. Then wash it under the tap and leave it for a few hours in a
glass of water in which 1 cm
3
of hydrochloric acid has been added.
Recalibrate the probe again.
If well maintained, a probe can last for two or three years.
The probe should never be left to dry. If it is kept outside the
installation, the original cap should be placed, or it should be submerged