VACUUBRAND PC 2001TE VARIO - Manual (Page 22)

page 22 of 50
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.: 99 91 35 / 11/04/2008
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 cooling water valve has to be preselected, see section ”
Setting the mode”.
Mode vacuum control
After switching on
Venting
(only possible if an external air admittance valve is connected and configurated)
Short venting, e. g. in case of boiling retardation 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 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 STOP interrupts venting at any time.
START
STOP
Starting and stopping the process control
➨ Starting process control: Press key START/STOP.
☞ If a cooling water valve is preselected: Cooling water valve
opens immediately, 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 cooling water valve is preselected: The cooling water
valve continuous to run for additional 5 minutes to allow con-
densation 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