VACUUBRAND MV 2 VARIO - Manual (Page 19)

page 19 of 41
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.: 999035 / 15/12/2009
Ensure that the turbo molecular pump is vented according
to the instructions for use of the manufacturer.
Short venting:
➨ 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.
The process control is not active, i. e. the controller is ready for
vacuum control, but control operation has not been started.
☞ The basic setup as from last operation is reactivated (after
first switching on ”TURBO•MODE” (factory-set) is displayed).
☞ The actual pressure is displayed.
☞ Values as from last operation are reactivated.
☞ Press key START/STOP to start process control.
After switching on
Starting and stopping the process control
➨ Starting process control: Press key START/STOP.
➨ Stopping process control: Press key START/STOP.
➨ Attention: If the controller is switched off during active pro-
cess control (i.e. without stopping the process control be-
forehand by pressing key START/STOP), the pump starts
immediately after switching on the controller without press-
ing any further key. This behaviour is to prevent uninten-
tional venting of the vacuum system in case of short power
failure. The user has to ensure that no dangerous status of
the system due to the automatic startup of the pump can
occur and to provide appropriate safety measures.
Basic setup TURBO•MODE
START
STOP
VENT
Attention: If pressurized inert gas is used install an overpressure relief valve.
Ensure that high pressure is compatible with the mechanical stability of the sys-
tem!
Venting
(only possible if an external air admittance valve is connected and configurated)