VACUUBRAND CVC 2II - Manual (Page 23)

page 23 of 36
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 997835 / 15/12/2009
Basic setup VACUU•LAN
Venting
Short venting (e. g. in case of retardation of boiling or if sudden
foaming occurs):
➨ Press key VENT shortly (< 2 sec.).
☞ Pumping is interrupted, the process control is stopped.
Venting the system:
➨ Press key VENT continuously (> 2 sec.) until symbol air
admittance valve is displayed.
☞ Pumping is interrupted, the process control is stopped.
☞ Ventilation until pressure does not change any more, i. e.
until atmospheric pressure is attained
☞ Key STOP interrupts venting at any time.
Starting and stopping process control
➨ To start the process control: Press key START/STOP.
☞ The pump is switched on.
☞ If the cooling water valve is preselected: Cooling water valve
opens immediately, the symbol is displayed.
☞ The pump (and the cooling water valve if applicable) is
switched off if the pressure is below the lower pressure value
longer than the time for automatic shut down.
☞ The pump starts automatically if the pressure is higher than
the upper set point.
➨ To stop process control: After time for automatic shut down
or pressing key START/STOP the process control is stopped.
☞ The pump is switched off.
☞ If a cooling water valve is preselected: Cooling water valve
is switched off.
After switching on
The process control is inactive, i. e. the controller is ready for
vacuum control, but control operation has not been activated.
In basic setup VACUU•LAN it is not possible to activate the
two-point control.
The controller is in operation mode continuous pumping.
☞ The actual pressure is displayed.
☞ Values as from last operation are reactivated (factory-set:
time for automatic switch off 15 minutes, pressure value 20
mbar, upper set point 200 mbar).
☞ Press key START/STOP to start process control.
START
STOP
VENT
Attention: If pressurized
inert gas is used install
an overpressure relief
valve. Max. pressure at
the pressure transducer
1600 mbar! Ensure that
high pressure is
compatible with the
mechanical stability of
the system!