6 Functional description
6.1
Device
An electric motor drives a rotor. Rollers are fitted to the ends of the rotors,
which press the pump hose against the inner curvature of the dosing
head. The peristaltic pump operates by the rollers driving the feed chem‐
ical through the pump hose. The feed chemical is primed by the pump
hose automatically returning to its initial position.
6.2 Capacity
The capacity that has been set regulates the pump itself.
6.3 Operating modes
Operating modes are selected via the "Operating modes" menu.
Refer to the "Hierarchy of Operating Modes, Functions and Fault Statuses"
for the order of the various operating modes, functions and fault statuses.
‘Manual’
operating mode permits you to operate the pump manually.
This operating mode provides the option of controlling the pump externally
by means of potential-free contacts (e.g. by means of a contact water
meter). “Pulse Control” can be used to preselect the metering volume in
the
‘Settings’
menu.
This operating mode provides the option of working with large metering
volumes. Metering can be triggered either by pressing the
[Clickwheel]
or
by a pulse received via the "External control" terminal via a contact or a
semiconductor switching element. It is possible to pre-select a metering
volume (batch) and a metering time using the
[Clickwheel]
in the
‘Settings’
menu.
The capacity is controlled using an analogue current signal via the
"External control" terminal. Processing of the current signal can be prese‐
lected using the control unit.
6.4 Functions
Refer to the "Hierarchy of Operating Modes, Functions and Fault Statuses"
for the order of the various operating modes, functions and fault statuses.
The following functions can be selected using the
‘Settings’
menu:
"Manual" operating mode
"Contact" operating mode
"Batch" operating mode
"Analog" operating mode
Functional description
20
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