User guide

page 36 of 61
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.: 999248 / 28/04/2011
Semi-automatic distillation and evaporation
☞ Select function ”Pump down”.
☞ Startprocessbypressingkey”START/STOP”.
☞ Observeprocess.Assoonasevaporationstarts,presskey”MODE”(switchingto”Vaccontrol”).The
vacuumleveliskeptconstant(attheboilingpressure).Finetuningofthevacuumvalueispossible
byturningtheselectionknob.
 Pressingkey”MODE”asecondtimeswitchesto”Automode”causingthevacuumleveltobeauto-
matically adapted to changes of the boiling pressure.
alternatively:
☞ Select function ”Vac control”.
☞ Settingamaximum”Speed” leads to a faster or slower process.
☞ To set ”Maximum” is usually not necessary because the pressure does not increase at the end of the
evaporation.
☞ Set a value for ”Duration” iftheprocessshouldautomaticallybeterminatedattheendofadenite
time.
☞ Set ”Set vacuum” depending on the solvent and the temperature.
☞ Startprocessbypressingkey”START”.
☞ Temporary switching to” Auto mode”:Presskey”MODE”.Thecontrollerswitchesto”Automode”.
Thesettingofthecontrollerdoesnotchangeduetothisswitching.Afterpressingkey”START/STOP”
the controller is in ”Vac control” again.
alternatively:
Fully automatic determination and adaptation of the boiling point (recommended)
☞ Select function ”Auto mode”.
☞ Startprocessbypressingkey”START/STOP”.
☞ Thefunction”Automode”allowsafullyautomaticdistillationeveniftheboilingpressureisunknown.
In case of solvent mixtures the vacuum is reduced until all solvents or volatile components are
evaporated (with respect to the ultimate vacuum of the pump and the bath temperature).
☞ If ”Minimum” is set the controller switches off the pump when the preset vacuum value is reached.
The ”Minimum” should be clearly below the boiling vacuum of the solvent to be evaporated and
above the ultimate vacuum attainable in the apparatus. If the ”Minimum” is set to ”Auto” , the control-
ler automatically switches off the pump at the end of the evaporation (recommended for large solvent
quantities only). The setting of ”Duration” (process runtime) is without effect if the pump is switched
off due to ”Minimum” before ”Duration” is over.
☞ When setting a value for ”Duration” the controller switches off the pump when ”Duration” has passed
even if a preset ”Minimum” is still not reached.
☞ If neither ”Minimum” nor ”Duration”ispreset,theprocesshastobenishedbypressingkeySTOP.
5.7.3 Vacuum for distillation and evaporation (e. g. rotary evaporator)
☞ Select function VACUULAN.
☞ Set ”Set vacuum” toapressurevaluewhichcanbereachedinthevacuumnetworkreliablyunder
consideration of the ultimatevacuumofthepumpandthe leak rate of the system in case of no
vacuum demand.
☞ Choose the vacuum for switching on the pump again (”Switch on”) in order to ensure sufcient
vacuum for all processes.
☞ Preset ”Delay” if necessary.
☞ Startprocessbypressingkey”START/STOP”.
5.7.4 Vacuum for VACUU•LAN networks