The pump is started up and stopped manually by pressing the START/STOP button (the Stop icon will be off or illuminated
respectively).
WARNING: The pump may stop automatically if a pump-stop signal is given by the level probe (Level icon illuminated and
Alarm LED steady on), see the section on Checking the level of the liquid to be dosed.
PROPORTIONAL MODE
I
n this mode the pump doses at a
variable flow rate depending on an an outside signal; It is possible to chose any of the
following options:
1. Mode 1:n. After each external pulse, for instance from a water-meter connected to the pump, the pump will dose “n”
strokes.
2. M
ode n:1. After each “n” external pulses, for instance from a water-meter connected to the pump, the pump will dose 1
stroke
3. M
ode 0/4—20. The pump will dose at a flow rate that is proportional to an input signal of the type 0/4-20 mA.
4. M
ode 20—0/4. The pump will dose at a flow rate that is proportional to an input signal of the type 20-4/0 mA.
T
he succession of operations that are required to set the preferred mode is illustrated below. In the block
diagrams accompanying the various steps,
the values that are shown on the display refer to the default
values.
1) mode 1:n
T
his mode enables n strokes to be dosed for each pulse received from an outside source, for instance from a water-meter
able to send out pulses.
These strokes are dosed at the maximum working frequency (400 strokes/min).
Press the Pr
og button and select the PROPORTIONAL MODE (see Programming). On confirming the
PROPORTIONAL MODE by pressing the Enter key, mode 1.n is entered directly: the indication F 1.n will appear on
the display and the 1:n icon will flash.
If the Enter key is pressed, this mode is confirmed and the value of n will appear on the display. This refers to the
number of strokes the pump will provide for each pulse received. The or arrows can be used to increase or
decrease this value respectively.
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