24
Operation
P 2.1S/P 4.1S user manual V6870, version 3.1
Result:
The setting is completed. If the maximum pressure is exceeded, the
pump switches off. If the minimum pressure is undercut, the pump switches off
after 30 s. The display shows an error message in both cases.
Setting the Power Consumption
The power consumption is dependent on the flow rate and the counter pres-
sure. It increases with higher flow rates and stronger counter pressure.
Exceeding or undercutting the values for the maximum or minimum power
consumption leads to the pump being automatically shutdown.
Set the maximum power consumption for the pump without pressure sensor
to limit the pump pressure.
Set the minimum power consumption so as to avoid a dry run of the pump
at highly reduced maximum power consumption (e. g. if leaking).
The pump is preset to a standard value for the maximum power consumption.
KNAUER recommends that with smaller flow rates the standard value for the
maximum power consumption should be insignificantly decreased.
Note:
If the minimum is set to
0
, the minimum power consumption is not mon-
itored.
5. When the cursor flashes, use the
arrow keys again to set the value
for the minimum pressure.
6. Hold down left arrow key. Press
right arrow key once to return to
the start display.
Fig. 14
Minimum pressure
Legend
1
Maximum value
2
Minimum value
Process
Figure
1. Press both arrow keys simultane-
ously until the correct display
appears.
2. Let go of the arrow keys.
9
P
1
2
000
050
I
I
