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DETERMINATION OF THE REDOX CUT-IN VALUE
Proceed as follows to determine the Redox cut-in value:
- The pH value must be regulated to obtain the desired value (in general 7.2 - 7.4).
- Calibrate the sensor (see preceding chapter) and turn on the filter.
The FRH pump must continue working.
- Manually add small doses of chlorine to the water. Use a reliable test kit (DPD) to analyse
the pool water after each chorine addition.
- When the analysis shows that the desired free chlorine values has been obtained,
the mV value displayed by the FRH pump must be recorded. Store this value as cut-in value.
PROGRAMMATION OF THE CUT-IN VALUES
The cut-in values are the threshold values of the dosing pump operation ("set points").
pH section
Press ENTER for 3 seconds to enter the programming mode in the screen 1. Then enter the
password if any, press ENTER, select Set up and press ENTER again, select Set-Point,
press ENTER, and select pH:
ATTENTION :
IF NO KEY IS PRESSED FOR 90 SECONDS, THE DOSING STATION QUITS THE
PROGRAMMING MODE AND GOES BACK TO SCREEN 1.
If you press ENTER, the following will be displayed:
The cursor indicates the values which can be modified. Use the # $ keys to modify the data.
You can switch to other areas pressing the ! " keys.
In our example, screen 6.1 shows that the acid dosing pump will be stopped at a pH value of 7.3
or less. If the pH value increases, the pump will be restarted and the flow rate will be adjusted
proportionally to reach 100% of the maximum flow rate at 7.8 pH. Should the pH value continue
to increase, the pump would continue to work at a maximum flow rate. If the pH range is limited
to 7.2 and 7.3, the dosing is still in the proportional mode, but it approaches the ON/OFF mode.
If approximately the same pH value is programmed, the station works in the ON/OFF mode.
Complete with ENTER to save the data. The "SETPOINT SAVED" message will appear on th e
screen and the system will go back to screen 6. Press the ESC key several times to go
back to screen 1.
ON/OFF mode (option) :
You can enter OFF instead of 00 % and ON instead of 100 %, if you do not want to enter the values
in % (do not forget to reduce the range, for example: 7.30 = OFF / 7.40 = ON).
Screen 6
pH &
% 7.30 pH =
Screen 6.1
7.80 pH =
Set-Point
mV
00 %
100 %
12
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