User guide

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Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011
➨ Continuous pumping with pressure and time settings
• Operation on demand of a speed controlled pumping unit
Preselections
☞ Usetheselectionknobtoselecttheparameters.Allparameterscanbealteredevenwhileoperation
control is running.
☞ Speed:Preselection ofthemotorspeedforpumpdown.Theselection”HI”effectsthemaximum
speed and best ultimate vacuum of the pump (with automatic speed reduction at ultimate vacuum).
The ”Speed” is adjustable in a range of 1-100% and to ”HI”.
☞ Minimum: The controller switches the pump off once the preset value for ”Minimum” has been
reached.
”Minimum” is adjustable in a range of 1-1060 mbar or can be set to ”Off”.
A preset ”Duration” (process time) is without effect, if the process is stopped due to a preset ”Mini-
mum” before ”Duration” is reached.
☞ Delay: ”Delay” determines the time the coolant valve is running on after the process has been
stopped.
The ”Delay” is adjustable in a range of 1-300 minutes or can be set to ”Off”.
☞ Duration: ”Duration” determines the total process time since control start.
The process time is adjustable between 1-1440 minutes (24 h) or can be set to ”Off”. ”Off” indicates
that no endpoint for pump down is determined.
If a ”Duration” is preset, the controller switches off the pump when the preset process time is reached,
also if a preset ”Minimum” is still not reached.
☞ If neither ”Minimum” nor ”Duration”arepreset,processcontrolhastobestoppedbypressingkey
”STOP”.
The screen-shot shows the factory-set values.
Pump down
Speed HI
Minimum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - - -
-------Back--------
00:00:00
When selecting ”Graphic” the display shows a pressure vs. time curve.
The timeline in the diagram adapts automatically to the process time.
☞ Presstheselectionknobtwicetoreturntothestandarddisplay.
10 mbar
00:03:50
5.2 Function Pump down
Pump down