VACUUBRAND CVC 3000 - Manual (Page 50)

page 50 of 80
alternatively:
Fully automatic determination and adaptation of the boiling point
with NT VARIO / VARIO-B diaphragm pumps (recommended)
+
Select ” Auto mode”.
+
Start process by pressing ”START/STOP” key.
+
The ”Auto mode” allows a fully automatic distillation even if the boiling
vacuum is unknown. In case of solvent mixtures the vacuum is reduced
until all solvents or volatile components are evaporated (with respect
to the ultimate vacuum of the pump and the bath temperature).
+
If ”Minimum” is set, the controller switches off the pump when the pre-
set vacuum value is reached. The ”Minimum” should be well below
the boiling vacuum of the solvent to be evaporated and above the ul-
timate vacuum attainable in the apparatus. If the ”Minimum” is set to
”Auto”, the controller automatically switches off the pump at the end
of the evaporation (recommended for large solvent quantities only).
The setting of ”Duration” (process runtime) has no effect if the pump is
switched off due to ”Minimum” before ”Duration” is over.
+
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.
+
Select function ” VACUULAN”.
+
Set ”Set vacuum” to a pressure which can be reached reliably in the
vacuum network. Take account of the ultimate vacuum of the pump
and of the system’s leak rate in case of no vacuum demand.
+
Set ”Switch on” pressure appropriately to ensure sufficient vacuum for
all connected applications.
+
Set ”Delay” if necessary.
+
Start process by pressing ”START/STOP” key.
Vacuum for VACUU•LAN networks