Operating Instructions (GB)
900 191 - V1.0
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Page 33
10.4 Level monitoring – 4…20mA
Using a graphically illustrated pump shaft in the main display, the operator is informed about the current level
and the measuring system.
First, the measuring range, the level unit and, if applicable, the high water float switch in the setup menu.
More detailed information about the setup menu is provided in Chapter 11.2.
Chart
Description
Explanation
-
Measuring method 4…20
mA
-
Level unit "cm"
-
High water float
After pressing the symbol, the "Level monitoring"
menu appears.
The fill level for the respective switching points
can be entered here.
The zero adjustment for the measuring system
can also be performed here.
The scaling of the graphical level indicator is based on the alarm level defined in the “Level monitoring” menu.
The measured level value is shown in the display as an actual value next to the shaft symbol.
Located below is the display for the manually specified setpoint value.
If an
additional high water float switch
is installed in the system and connected to the control system
(beyond the standard measuring system), it must be enabled in the setup menu. It is then displayed in the shaft
symbol.
Manual adjustment of the
setpoint value on the main
display
Setting range:
min. 1 cm (1 mm) – max. 400 cm (4000 mm)
Alarm level:
The alarm level can be set up in this menu item. An alarm is
issued if the level is exceeded (high water). The value must be adapted to
the local conditions.
Maximum water level:
The maximum adjustable fill level for the setpoint
value water level is set here. Manual adjustment
of the setpoint via the
main display is only possible up to this value.
Pump-out hysteresis:
In order to delay the activation of the pump-out
function, a value between 2–10 cm (20–100 mm) must be set in this menu
item.
Water level setpoint:
The setpoint value for the water level in the
equalisation shaft which is used to regulate the level is specified in this
menu item.
If necessary, the value can be adjusted up or down using the two arrow
keys on the main display.
If this setpoint value is exceeded or fallen short of, the infeed or pump-out
process is stopped.
Infeed hysteresis:
In order to delay the activation of the infeed function,
a value between 2–10 cm (20–100 mm) must be set in this menu item.
Minimum water level:
The minimum fill level that can be set for the
setpoint value water level is set here. Manual adjustment
of the setpoint
via the main display is only possible up to this value.
Dry run:
A dry run level can be entered in this menu item. An alarm is
issued if this value is fallen short of.
Perform zero adjustment:
A zero adjustment of the measuring system used is carried out in this menu item.
When calibrating the measuring system must not be in the water. You must also ensure that the measuring
system is at rest during the calibration procedure.
The zero balance calibration can be repeated at any time.
Level monitoring
Alarm level
Max. water level
Pump-out hysteresis
Water level setpoint
Infeed hysteresis
Min. water level
…
