Function Vac Control - vacuubrand ME 4C NT VARIO Instructions For Use Manual

Function Vac control

➨ Vacuum control to a preset vacuum value
• Operation on demand of a speed controlled pump (NT VARIO / VARIO-B)
Preselections
☞ Use the selection knob to select the parameters. All parameters can be altered even while operation
control is running.
☞ Set vacuum: The "Set vacuum" is the set point for vacuum control with pinpoint precision for NT
VARIO / VARIO-B pumps. The selection "Turbo" leads to the optimum backing pressure for a turbo-
molecular pump.
The "Set vacuum" is adjustable in a range of 1 - 1060 mbar or can be set to "Turbo".
☞ Speed: The maximum motor speed can be preselected (to control the pumping speed).
The selection "HI" (recommended) provides the optimum pumping speed of the pump and therefore
an optimum ultimate vacuum.
The "Speed" is adjustable in a range of 1-100% or can be set to "HI".
☞ Maximum: An upper pressure limit can be preselected. The pump switches off if the pressure limit is
exceeded, e. g. at the end of suctions or filtrations. The pressure limit is only active once the pressure
has gone below "Maximum".
The "Maximum" is adjustable in a range of 1059 - 1 mbar (at the least 1 mbar higher than the "set
vacuum") and to "Off". "Off" means that no "Maximum" value is preset.
☞ 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.
A preset "Duration" (process time) is without effect, if the process is stopped due to a preset "Maxi-
mum" before "Duration" is reached.
The "Duration" is adjustable between 1-1440 minutes (24 h) or can be set to "Off". "Off" means that
no endpoint of the process is defined.
The screen-shots show the factory-set values.
Vac control
Set vacuum 100 mbar
Speed
Maximum
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 32 of 75
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HI
Off
Off
Off
Vac control 80 mbar
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