6.3 Dosing rate
The pump itself regulates the dosing rate that has been set in
‘Automatic’
ON mode.
By contrast, in conventional mode (
‘Automatic’
-OFF), the stroke
length and stroke rate determine the dosing rate. The stroke length
can be adjusted between 0 and 100% via the continuous display or
the menu. Only a metering volume of between 30 to 100% is repro‐
duced as being technically sensible! The stroke rate can be set via
the menu (not in "Analog" operating mode) within a range of 0 -
12,000 strokes/h.
6.4 Self-degassing
SER types
Self-degassing liquid ends without bypass are capable of inde‐
pendent priming when a pressure line is connected and pumping
any air locks present into the pressure line. During operation, they
are also capable of conveying away gases that are produced, inde‐
pendently of the operating pressure in the system.
6.5 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 man‐
ually.
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). The "Pulse Control" option allows you to pre‐
select the number of strokes (a step-down or step-up factor of 0.01
to 99.99) in the
‘Settings’
menu.
This operating mode provides the option of working with large step-
up factors (up to 99,999). Metering can be triggered either by
pressing the
[Clickwheel]
or by a pulse received via the "External
control" terminal by a contact or a semiconductor switching ele‐
ment. It is possible to pre-select a metering volume (batch) or a
number of strokes using the
[Clickwheel]
in the
‘Settings’
menu.
The dosing rate and/or stroke rate is controlled by an analogue
current signal via the "External control" terminal. The processing of
the current signal can be preselected using the control unit.
"Manual" operating mode
"Contact" operating mode
"Batch" operating mode
"Analog" operating mode
Functional description
25
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