Rev 1.1 Cod. 00.009.127
32
PROPORTIONAL DOSING
This kind of dosing is proportional to the distance of the measure from the
desired Setpoint.
Proportionality is achieved by modulating the pump flow rate from 10-100% of
the maximum flow.
The proportionality range and the verse are freely programmable (
SetP
. end
T.Max
).
There is a fixed hysteresis in the dosage range of 0.05ppm. This hysteresis
avoids unwanted dosing in the case of use of unstable probes.
SetP
. = Setpoint, desired value of measure
T.Max
= Maximum Threshold, value of the measure that defines the range of
proportionality and the direction of the dosing. When the measure reaches the maximum threshold, the pump flow rate is
maximum.
Flow.Max
=% Maximum flow rate
Del.On
= seconds expected by the pump before dosing when the setpoint is exceeded
EXAMPLE OF SETTING THE SETPOINT
:
In the
Dosing
menu, select "
Proportional
" by the
cursor and press
ENTER
.
The factory parameters are shown in the figure on the
left.
Use the ▼ ▲buttons to move the cursor and select
the parameter to be modified and press
ENTER
to
enter the modification.
Use the ▼ ▲ keys to select the desired value and
press the
ENTER
button each time to confirm the
change.
If you want to esc programming and return to
measurement, press
ESC
for 3 seconds.
The factory settings allow to dose Chlorine in the plant.
With a measure equal to or greater than 1.20ppm the pump does not dose .
With a measure equal to or less than 0.20ppm the pump doses at 80% of the maximum flow.
With a measure between 0.20ppm and 1.20ppm the pump doses proportionally to the distance of the measure from the
setpoint.
Example:
-measure = 1.00ppm, the pump will dose at 24%
-measure = 0.70ppm, the pump will dose at 45%.
IMPORTANT NOTE
:
WARNING!!
T
he factory parameters
shown are also valid for the pump
version combined with the
potentiostatic chlorine probe
0-2.0ppm. In the application of water
purification, the desired chlorine
values are much lower. So in case
of restoration of the factory
parameters the pump must be
reprogrammed with the desired
chlorine values!!!
Содержание VP2-HT CL
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