Operation
23
P 2.1S/P 4.1S user manual V6870, version 3.1
dent on the compressibility and the viscosity of the used solvent and on the
pump. Therefore, it must be determined individually for each pump.
The flow rate can be altered while the pump is in operation.
Practical Tip:
Hold down both arrow keys to expedite changing the values.
Result:
The setting is completed and the pump runs at the set flow rate.
Setting the Pressure Switch Off
Set maximum pressure to avoid damaging the pump or pump head.
Set minimum pressure to avoid running the pump dry.
Note:
If the minimum is set to
0
, the minimum pump pressure is not moni-
tored.
Process
Figure
1. Use the arrow keys to set a value
for the flow rate.
2. Check if the right value appears on
the display.
Fig. 12
Display control
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.
3. When the cursor flashes, use the
arrow keys again to set the value
for the maximum pressure.
4. Hold down left arrow key. Press
right arrow key once.
Fig. 13
Maximum pressure
9
123
P
P
1
2
123
P
