User guide

page 29 of 61
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
Vac control
Set vacuum 100 mbar
Speed HI
Maximum  Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - -
-------Back-------
00:00:00
The screen-shots show the factory-set values.
When selecting ”Graphic” the display shows a pressure vs time curve.
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. The selec-
tion”Turbo”leadstotheoptimumbackingpressureforaturbomolecular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ltrations.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dened.
➨ Vacuum control to a preset vacuum value
• Operation on demand of a speed controlled pumping unit
The timeline in the diagram adapts automatically to the process time.
☞ Presstheselectionknobtwicetoreturntothestandarddisplay.
80 mbar
00:13:00
5.3 Function Vac control
Vac control