14
9.3.3. PH CONTROLLER
pH Controller regulates pH value of a swimming pool thanks to the pH
Probe readings and the control of a peristaltic dosing pump.
Emaux
SSC
one
®
unit will read the signal from the pH probe, will compare
it with the desired pH value, and will switch on/off the dosing pump
accordingly.
There are two different pH signals in the controller:
GREEN LIGHT
RED LIGHT
Desired pH Value (Set point) Current pH value read by the pH probe
Control procedure:
Press the b or – to increase or decrease the set point.
Remember the recommended range of pH value in a swimming pool is between 7.2 and 7.6.
In order to regulate the pH correctly, the Total Alkalinity of the pool water must be maintained
in the range 80 – 120 ppm. Use a pool water test kit to check the Total Alkalinity and adjust it
manually if necessary.
PH CALIBRATION:
We recommend you calibrate the pH probe at least once per month during the operating
season.
Calibration Procedure:
1.
Extract the pH probe from the holder and clean it with fresh water.
2.
Green LED light in POWER is slowly flashing.
3.
Press and hold the b and – of pH Controller simultaneously. The whole values of
pH will turn green.
4.
Put the pH probe to the first buffer solution (pH 4). Green lights will count down until the
end.
5.
Clean the pH probe again with fresh water.
6.
Press and hold again the b and – from the pH Controller. This time, the whole
values of pH will turn red light.
7.
Put the pH probe to the second buffer solution (pH 10). Red lights will count down, and turn
off when finish.
8.
The complete range of lights (red and green) will indicate the calibration has been done
successfully.
PERISTALTIC DOSING PUMP:
While Hypochlorous acid (HClO) generated by the Salt Chlorinator is disinfecting the water, the
pH tends to increase.
For this reason, the injection of acid into the water is always compulsory.
Emaux
SSC
one
®
unit includes a peristaltic dosing pump that will inject the acid into the circuit.
The dosing pump can work in Auto or Manual Mode:
1)
Mode AUTO:
The peristaltic dosing pump will be switched on or off according to the pH value read by the
probe and compared with the established Set Point.
