VACUUBRAND PC 620 NT - Manual (Page 26)

page 26 of 63
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.: 999188 / 19/05/2009
➨ Continuous pumping with pressure and time settings
• Operation of a vacuum pump via isolation valve
• Operation of a vacuum pump without isolation valve with VMS (Vacuum Management System,
see ”Accessories”)
Preselections
☞
The selection of the parameters is carried out via the selection knob. All parameters are also change-
able during running operation control.
☞ Minimum: The controller switches off the pump or closes the isolation valve when the preset value
for ”Minimum” is reached.
”Minimum” is adjustable in a range of 1-1060 mbar and to ”Off”.
A preset ”Duration” (process time) is without function, if the process is stopped due to a preset ”Mini-
mum” before ”Duration” is reached.
☞
Delay: ”Delay” determines the time the pump (with VMS and isolation valve) and the coolant valve
run on after stopping the process.
The ”Delay” is adjustable in a range of 1-300 minutes and to ”Off”.
☞ Duration: ”Duration” determines the total process time since its start.
The process time is adjustable between 1-1440 minutes (24 h) and to ”Off”. ”Off” indicates that no
endpoint for pump down is determined.
If a ”Duration” is preset, the controller switches off the pump if 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
Minimum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - -
- - - - - - Back- - - - - - - -
00:00:00
When selecting ”Graphic” the display shows a pressure over time curve.
The timeline in the diagram adapts automatically to the process time.
☞
Press the selection knob twice to return to the standard display.
Pump down 10 mbar
00:03:50
Temporary switching from ”Pump down” to ”Vac control” (only if control is running):
☞
Press key ”MODE”. The controller switches to function ”Vac control”, the actual vacuum is used as
set value.
☞ The preset function of the controller does not change due to this temporary switching. When pressing
key ”STOP” the controller is in function ”Pump down” again.
Function Pump down