VACUUBRAND PC 2001TE VARIO - Manual (Page 29)

page 29 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
Mode VACUU•LAN
After switching on
Starting and stopping the process control
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 (factory-set:
time for automatic shut down 60 minutes, pressure value
(condition for switching off) 100 mbar, upper set point (con-
dition for restart) 200 mbar).
☞ Press key START/STOP to start process control.
☞ A cooling water valve has to be preselected, see section ”
Setting the mode”.
➨ Starting process control: Press key START/STOP.
☞ The pump is switched on.
☞ If a cooling water valve is preselected: Cooling water valve
opens immediately, the symbol is displayed.
☞ If the pressure for switching off is achieved, motor speed
becomes reduced.
☞ 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 pressure value and in case of sudden gas forma-
tion.
➨ Stopping: After pressing key START/STOP or venting the
process control stops.
☞ The pump is switched off.
☞ If a cooling water valve is preselected: The cooling water
valve is switched off.
Venting
(only possible if an external air admittance 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 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.
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
START
STOP