VACUUBRAND PC 620 NT - Manual (Page 32)

page 32 of 63
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.: 999188 / 19/05/2009
☞ Select function ” Pump down”.
☞ Set ”Minimum” to prevent volatile components to evaporate. The process is stopped automatically as
soon as ”Minimum” is reached.
☞ Start process by pressing key ”START/STOP”.
alternatively:
☞ Select function ”Vac control” to dry at a predetermined vacuum level.
☞ Set ”Set vacuum” to the evaporation vacuum of the solvent. Adapt ”Hysteresis” if necessary.
☞ Set a process time (”Duration”) if necessary.
☞ Start process by pressing key ”START/STOP”.
Examples for use
Assembly of a vacuum system
☞ Assemble vacuum connection lines between controller, vacuum pump (diaphragm pump with isola-
tion valve or Vacuum-Management-System) and apparatus.
☞ Assemble electrical connections.
☞ Connect coolant if necessary.
Vacuum for filtration and suction
☞ Select function ” Pump down”.
☞ Set ”Minimum” to a value which does not lead to evaporation of the solvent.
☞ Start process by pressing key ”START/STOP”.
alternatively:
☞ Select function ” Vac control”.
☞ Set ”Set vacuum” (and ”Hysteresis” ,if necessary) so that no evaporation of the solvent occurs.
☞ Set ”Maximum” to switch off the pump at the end of the process or in case of a filter cake crack (pres-
sure increase).
☞ Start process by pressing key ”START/STOP”.
☞ Tip for filtration: Adjust preset pressure to a value well above the boiling pressure of the solvent
(e.g. water >>20 mbar). Set the maximum pressure to e.g. 500 mbar. Once the filtration has finished,
the pressure increases and the pump is switched off automatically.
Vacuum for gel dryer, drying chambers and vacuum concentrators