VACUUBRAND PC 620 NT - Manual (Page 29)

page 29 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
Program -
Edit
Open 0
Store 0
Hysteresis Auto
Delay Off
- - - - - - Graphic - - - - - -
- - - - - - Back - - - - - - -
1013mbar
The last process (not in operation mode VACUULAN) is stored in the temporary data memory as long as
the controller stays switched on. This program can be transferred to a storage space and edited.
➨ Ten programs with up to ten program steps with preset values for vacuum and time can be set
and stored.
☞ Edit: Preset values for the process run can be edited:
Time: Process runtime for each program step to reach a preset vacuum level or if setting ”Step”
runtime after having achieved the vacuum level. The summed up total process runtime is shown in
the base line. Attention: A preset runtime of 99:59:59 hours in the final program step will cause the
process to run endlessly. Termination of the process by pressing key ”STOP”.
Vacuum: Vacuum value to be attained.
Venting valve: Operation of a venting vale to reach a preset vacuum value.
”Step”: ”Step” causes pump down as fast as possible to the preset vacuum level. As soon as the
vacuum level is reached the time meter starts running.
☞ Open: Open programs (Program 0 - 9).
☞ Store: This command stores an edited program or the program of the just expired process to one of
the storage spaces 0 - 9.
☞ Hysteresis: Control bandwidth of a two-point control. A too small hysteresis leads to frequent switch-
ing of the valve or the pump, a too large hysteresis leads to imprecise control. Suggested values for
the hysteresis are stored in the controller (setup ”Auto”) and are adapted automatically to the preset
pressure. Adapting the hysteresis by the user is possible at any time.
The hysteresis is adjustable in a range of 1 - 300 mbar and to ”Auto”.
☞ Delay: ”Delay” determines the time which the pump (with VMS and isolation valve) and the coolant
valves run on after stopping the process.
The ”Delay” is adjustable in a range of 1-300 minutes and to ”Off”.
The screen-shot shows the factory-set values.
When ”Graphic” is selected the display shows a pressure over time curve (right screen-shot).
The number of the program with program step, the set vacuum, the actual vacuum and the runtime are
displayed.
The timeline in the diagram adapts automatically to the process time.
☞
Press the selection knob twice to return to the standard display.
Program 5 : 4 1013mbar 900mbar
00:28:00
Function Program
Attention: If the controller is set to ”Defaults”: ”On”, all stored programs are deleted.
Editing:
☞
To select row: turn and press selection knob.
☞ Turning the selection knob: adjust parameter.
☞ Pressing the selection knob: confirm parameter, jump to next parameter.
☞ After 5 seconds without change the parameter is accepted automatically.