Program function – VACUUBRAND CVC 3000 detect User Manual

Page 40

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Program function

Permits ten programs to be defined and stored, each with up to

ten program steps with preset values for vacuum and time.

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Edit:

Use to define the preset values for the process run:

Time: Defines either the process runtime for each program step to

reach a preset vacuum level or, if programming a ”Step”, the runtime

after having achieved the vacuum level. The 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. Ter-

minate the process by pressing the ”STOP” key.

Vacuum: Vacuum level to be attained.

Venting valve: Operating a venting valve to reach a preset vacuum

level.

”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.

”det.” (detect): det. =

: indicates that the system will search for a

boiling point automatically until a preselected time interval is reached.

Selecting ”det.” in combination with ”Step” in one program step is not

possible.

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Open: Choose program (Programs 0 - 9).

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Store: This command stores an edited program or the program of the

last process to one of the storage spaces 0 - 9.

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Hysteresis: The ”Hysteresis” is the control bandwidth of the two-point

control. A too small hysteresis will lead to frequent switching of the

valve or the pump. A too large hysteresis will lead to imprecise con-

trol. Suggested ”Hysteresis” values are stored in the controller (setup

”Auto”) and are adapted automatically to the preset pressure. The hys-

teresis can be adapted at any time.

The ”Hysteresis” is adjustable in a range of 1-225 Torr (1-300 mbar) or

can be set to ”Auto”.

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