VACUUBRAND MZ 2C VARIO - Manual (Page 24)

page 24 of 51
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.: 999034 / 22/04/2008
The process control is not active, i. e. the controller is ready for
vacuum control, but control operation has not been started.
☞ The mode as from last operation is reactivated (after first
switching on “vacuum control” (factory-set) is displayed).
☞ The actual pressure is displayed.
☞ Values as from last operation are reactivated.
☞ Press key START/STOP to start process control.
☞ A coolant valve has to be preselected, see section ” Setting
the mode”.
Mode vacuum control
After switching on
Venting
(only possible if an external venting valve is connected and configurated)
Short venting, e. g. in case of radiation of boiling or 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 vent-
ing valve is flushing.
☞ Pumping is interrupted, the process control is stopped.
☞ Ventilation until pressure does not change any more, i. e.
until atmospheric pressure is attained.
☞ Key START/STOP interrupts venting at any time.
START
STOP
Starting and stopping the process control
➨ Starting process control: Press key START/STOP.
☞ If a coolant valve is preselected: Coolant valve opens im-
mediately, the symbol is displayed.
➨ Stopping process control: Press key START/STOP.
☞ The pump is switched off.
☞ Attention: Adopt suitable measures if there is a possible pres-
sure increase after switching off the pump, e. g. due to low
boiling solvents.
☞ If a coolant valve is preselected: The coolant valve continu-
ous to run for additional 5 minutes to allow condensation of
vapours which remain in the system. Symbol “cooling water”
is flashing.
Attention: If pressurized
inert gas is used install an
overpressure relief valve.
Ensure that high pressure
is compatible with the
mechanical stability of the
system!
VENT