VACUUBRAND CVC 3000 - Manual (Page 48)

page 48 of 80
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Select ” Pump down” function. ”Speed” (only with NT VARIO / VARIO-
B pumps) ”HI” is recommended. For gel dryers set a lower speed if
necessary (if the gels tend to crack).
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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 (only without NT VARIO / VARIO-B).
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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
Vacuum for distillation and evaporation
(e.g., rotary evaporator)
Semi-automatic distillation and evaporation
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Select ” Pump down” function.
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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.
Pressing ”MODE” key a second time switches to ”Auto mode” (only
with NT VARIO / VARIO-B pumps) causing the vacuum level to be au-
tomatically adapted to changes of the boiling pressure.