PARAMETER
Free chlorine + mV - mV
Combined chlorine - mV + mV
pH - mV + mV
Stabiliser (isocyanuric acid)) - mV + mV
TDS (total dissolved solids) - mV + mV
Temperature + mV - mV
7. In case it was necessary to add stabiliser to the water, it should be taken into account
that its employment in concentrations higher than 30-40 ppm produces a very
significant decrease of the ORP values (mV) obtained for a given concentration of free
chlorine.
8. THE ORP SET POINT VALUES FOR EACH POOL WILL BE FIXED IN AN
INDIVIDUALIZED WAY IN EACH INSTALLATION. Nevertheless, a general working
range of 700-800 mV may be fixed, for pH values between 7.2 and 7.8, and stabiliser
levels (isocyanuric acid) lower than 30 ppm. The previous table might be taken into
account when readjusting the set point values of the controller, as these parameters
are being modified with time. If the pH or the stabiliser level rise, lower ORP set point
values might be selected to maintain the same free chlorine concentration in the water.
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