Buchi Vacuum Controller V-855 Bedienungsanleitung PDF herunterladen (Seite 44)

6 Operation

44 V-850/855 Operation Manual, Version E

6.10 Tips and tricks for a distillation

6.10.1 What to do when the solvent starts foaming?

• Press the button P↑. The current system pressure is frozen and the aeration valve is opened. The

system is aerated and switches into the Hold mode, i.e. the H Off button becomes active.

• When the foam is gone or has sufﬁciently degenerated, press the H Off button to continue with the

distillation process.

• In case the solvent starts foaming again, repeat the measures described above.

6.10.2 How to ﬁnd out the distillation conditions for a solvent?

The solvent library integrated into the vacuum controller software provides you with information on a

number of different solvents.

To use the library, proceed as follows:

• Press the Library button. The solvent library screen opens.

• Select the solvent you are operating with by means of the selection knob on the vacuum controller

and press OK.

• Now deﬁne the bath temperature you want to operate with by means of the selection knob on the

vacuum controller and press Accept. The setting is saved and the value for pressure is adapted

accordingly.

NOTE

The values indicated for boiling point and cooling H

O max only serve for information purposes.

6.10.3 How to start a distillation without determining a pressure setpoint?

Preconditions:

• In the submenu Remote control Evaporator, the options Rotation start and Immerse ﬂask

have to be set to Off.

For a distillation quick start, proceed as follows:

• On the main screen press the Cont. button. The distillation starts.

• Now press the Man. button to enter the Manual mode.

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Buchi Vacuum Controller V-855 Bedienungsanleitung Seite 44