VACUUBRAND PC 3012 NT VARIO Duo User Manual

Page 77

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page 71 of 145

When setting a value for ”Duration” the controller switches off the

pump when ”Duration” has passed even if a preset ”Minimum” is still

not reached.

If neither ”Minimum” nor ”Duration” is preset, pumping down has to be

finished by pressing the ”START/STOP” key.

alternatively:

Semi-automatic distillation and evaporation

Select function ”

Pump down”.

Start process by pressing ”START/STOP” key.

Observe process. As soon as evaporation starts, press ”MODE” key

(switching to ”Vac control”). The vacuum level is kept constant (at the

boiling pressure). Fine tuning of the vacuum value is possible by turn-

ing the selection knob.

Pressing ”MODE” key a second time switches to ”Auto mode” causing

the vacuum level to be automatically adapted to changes of the boiling

pressure.

alternatively:

Select ”

Vac control” function.

Set a maximum ”Speed”, to select a faster or slower process.

To set ”Maximum” is usually not necessary, unlike filtrations, because

the pressure does not increase at the end of the evaporation.

Set a value for ”Duration” if the process should be terminated auto-

matically after a definite time.

Set ”Set vacuum” depending on the solvent and the temperature.

Start process by pressing ”START” key.

To temporarily switch to ”Auto mode”: Press ”MODE” key. The

controller switches to ”Auto mode”. The setting of the controller does

not change due to this switching. After pressing ”START/STOP” key

the controller is in ”Vac control” again.

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