Design and Function LABOPORT Pumps and Systems
22 Translation of original Operating Instructions, english, KNF 121211-121345 01/10
6.4. Vacuum Controller
1 Tubing
2 Power switch
3 Support
4 Electrical supply unit
5 Vacuum controller
12231
5
5
4
Fig. 8: Vacuum controller (shown: LABOPORT system SCC with pump
N 840.3 FT.18 as example)
Function
In laboratory systems without a vacuum controller the pump runs
continuously and works against its vacuum. If there is a vacuum
controller, it will switch the pump off once the selected target
vacuum has been reached.
With two vacuum controllers it becomes possible to simultaneously
run two different and independent processes with just one pump.
Once one vacuum controller’s set point has been reached, that
vacuum controller will close the valve it is controlling. If two
vacuum controllers are used, the pump will continue to work until
the second controller’s set point has been reached. Then the
second vacuum controller will close the valve it is controlling. The
pump switches off and the pump vent valve is opened.
If one of the two vacuum values falls below the hysteresis range,
the pump will switch back on.
Refer to the vacuum controller’s operating instructions for more
information.
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