VACUUBRAND PC 620 NT plastic housing - Manual (Page 65)

page 65 of 113
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Select function ” Pump down” function.
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Set ”Minimum” to prevent volatile components from evaporating. The
process is stopped automatically as soon as ”Minimum” is reached.
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Set a process time (”Duration”) if necessary.
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Start process by pressing ”START/STOP” key.
alternatively:
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Select ”Vac control” function to dry at a predetermined vacuum level.
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Set ”Set vacuum” to the preferred evaporation vacuum of the solvent.
Adapt ”Hysteresis” if necessary.
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Set a process time (”Duration”) if necessary.
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Start process by pressing ”START/STOP” key.
Vacuum for gel dryer, drying chambers and
vacuum concentrators
Semi-automatic distillation and evaporation
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Select function ” Pump down”.
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Start process by pressing ”START/STOP” key.
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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.
alternatively:
Diaphragm pump with in-line valve and/or Vacuum-Management-System
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Select ” Vac control” function.
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Set ”Set vacuum” (and ”Hysteresis”, if necessary) depending on the
solvent and the bath temperature.
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To set ”Maximum” is usually not necessary, unlike filtrations, because
the pressure does not increase at the end of the evaporation.
Vacuum for distillation and evaporation
(e.g., rotary evaporator)