VACUUBRAND CVC 3000 detect - Manual (Page 47)

page 47 of 74
alternatively:
For diaphragm pump with in-line valve and/or Vacuum-Management-
System
+
Select ” Vac control” function.
+
Set ”Set vacuum” (and ”Hysteresis”, if necessary) depending on the
solvent and the bath temperature.
+
Considering the hysteresis and the bath temperature, set ”Set vacu-
um” to a value which ensures that the solvent will definitely boil.
+
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.
+
Use ”Delay” to pump out condensate and clean the pump at the end of
the process. The in-line valve is closed and so the pump is separated
from the application. During ”Delay” the coolant valve is still open.
+
Start process by pressing ”START/STOP” key.
2. Semi-automatic distillation and evaporation
+
Select ” Pump down” function.
+
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.
+
Select ” Pump down” function.
+
Set ”Minimum” to prevent volatile components from evaporating. The
process is stopped automatically as soon as ”Minimum” is reached.
+
Set a process time (”Duration”) if necessary.
+
Start process by pressing ”START/STOP” key.
Vacuum for gel dryer, drying chambers and
vacuum concentrators
has evaporated and the controller is set again to the ”detect” function,
further components of the solvent mixture can be evaporated by re-
starting the ”detect” function.