ENGLISH
13
•
CONSTANT: the pumps operate at a fixed frequency or speed until they reach the set-point value.
•
PROPORTIONAL: the time-pause intervals or the injection frequency decreases as the set point value approaches to limit
oscillations of the measurement
•
INTERVAL: intervention value for the maximum PROPORTIONAL dosage
•
MAXIMUM FLOW RATE: full-scale value on which the proportionality of the dosage is regulated: 30÷300 sec. (peristaltic), 0÷100
% (electromagnetic)
The selection of the “
INTERVENTION TYPE
” parameter depends on the type of product dispensed.
•
pH:
If an acid product is used, the pump intervening with acid doses by pH values higher than the set-point to
lower the value to the desired point. On the other hand for alkaline intervention, with dosing aimed at increasing
the pH value, the pump doses with measures of pH lower than the set-point.
•
Rx:
If an oxidant product is used (e.g. sodium hypochlorite) the pump intervening with oxidant doses by mV
values lower than the set-point to increase the value to the desired point. On the other hand for reducing agent
intervention, with dosing aimed at decreasing the Rx value, the pump doses with measures of mV higher than
the set-point.
•
Cl:
If an oxidant product is used (e.g. sodium hypochlorite) the direct intervention pump doses by ppm values
lower than the set-point to increase the value to the desired point. On the other hand for inverse intervention,
with dosing aimed at decreasing the CL value, the pump doses with measures of ppm higher than the set-point.
To confirm the changes, confirm all the parameters in the SETPOINT menu until you go back to the window “PUMP 1 or
2 SET-POINT”. You may exit the menu (from any parameter) without saving the changes by pressing the MENU/ESC button.
