‘Manual’
operating mode: The stroke rate is set manually on the control
unit.
This operating mode provides the option of working with large transfer fac‐
tors (up to 99,999). Metering can be triggered either by pressing the
[Clickwheel]
or by a pulse received via the "External control" terminal or
via a contact or a semiconductor switching element. It is possible to pre-
select a metering volume (batch) or a number of strokes using the
[Clickwheel]
in the
‘Settings’
menu.
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 enables you to preselect the number of
strokes (a scaling or transfer factor of 0.01 to 99.99) in the
‘Settings’
menu.
‘Analogue’
operating mode The stroke rate is controlled using an ana‐
logue current signal via the "External control" terminal. The processing of
the current signal can be preselected using the control unit.
‘BUS’
operating mode: (Identity code, control version: CANopen or PRO‐
FIBUS
®
DP interface). This operating mode provides the option of control‐
ling the pump via BUS – see “Supplementary instructions for Sigma Con‐
trol type SxCb pumps with Can connector” or “Supplementary instructions
for delta
®
DLTa and Sigma SxCb with PROFIBUS
®
".
5.6 Functions
The following functions can be selected using the
‘Settings’
menu:
"Calibrate" function: The pump can also be operated in a calibrated state
in all operating modes. In this case, the corresponding continuous displays
can then indicate the metering volume or the capacity directly. Calibration
is maintained throughout the stroke rate range. The calibration is also
maintained when the stroke length is altered by up to ±10% scale divi‐
sions.
"Auxiliary frequency" function: Enables a freely selectable and program‐
mable stroke rate to be switched on in the
‘Settings’
menu, which can be
controlled via the "External control" terminal. This auxiliary frequency has
priority over the operating mode stroke rate settings.
"Flow" function: Stops the pump when the flow is insufficient, provided a
metering monitor is connected. The number of defective strokes, after
which the pump is switched off, can be set in the
‘Settings’
menu.
The following functions are available as standard:
"Level switch" function: Information about the liquid level in the dosing tank
is reported to the pump control. To do this, a two-stage level switch must
be fitted, which is connected to the "Level switch" terminal.
‘Batch’
operating mode
‘Contact’
operating mode
Functional description
21
Summary of Contents for Sigma 1 S1Cb
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