Function Pump Down - vacuubrand ME 4C NT VARIO Instructions For Use Manual

Function Pump down

➨ Continuous pumping with pressure and time settings
• Operation on demand of a speed controlled NT VARIO / VARIO-B pump
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
Minimum
Delay
Duration
- - - - - - Graphic - - - - - - -
- - - - - - - Back- - - - - - - -
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.
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.: 999164 / 19/05/2009
page 30 of 75
00:00:00
HI
Off
Off
Off
Pump down 10 mbar
00:03:50