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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
