VACUUBRAND PC 620 - Manual (Page 30)

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.: 999029 / 01/10/2009
page 30 of 48
Basic setup VACUU•LAN
Venting
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 vent-
ing 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 coolant valve is preselected: Coolant valve opens im-
mediately, the symbol is displayed.
☞ The pump (and the coolant 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 restarts automatically if the pressure rises 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 coolant valve is preselected: Coolant 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!