Buchi SpeedExtractor E-914, Operation Manual

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6 Operation
39
SpeedExtractor E-916 / E-916XL / E-914 Operation Manual
Setting the preheat temperature:
• Go to EXTRACTION

PREHEAT to open the
preheat submenu. CURRENT METHOD indicates
the temperature setting of the current method. Use
COPY to copy this value in the preheat entry to heat
up the instrument to the temperature for the next
run. Alternatively, set a new temperature using the
selection knob.
Activating the ECO MODE:
The ECO MODE automatically turns off the heater
after the next extraction run. It is recommend that the
EcoMode be activated for unattended operation of an
extraction run (e.g. starting a last run overnight).
• Use the selection knob to tick the ECO MODE. For
more information see section 6.2.7.
Start heating:
• Press ON to start heating. The software goes
back to the main display where the temperature
slowly converges to the set temperature. To abort
preheating go to EXTRACTION

PREHEAT and
press OFF. The red STOP button on the control
panel has no influence on the preheat function.
Preheat on demand:
Preheating the instrument is usually the first task when
turning on the instrument. It is therefore possible to
configure the instrument so that PREHEAT submenu
appears as soon as the instrument is turned on.
• To activate this function open MENU

INSTRU-
MENT SETTINGS. Go to PREHEAT DEMAND and
tick the function using the selection knob. Press OK
to confirm.
NOTE
When the temperature of a previous run is higher than actually required by the subsequent extrac-
tion method, long cooling off times are required. Placing empty and cold extraction cells into the
heating block is a fast and effective measure to cool down a hot heating block to a lower tempera-
ture.
6.2.4 Activating/deactivating positions
Reducing the amount of solvent used for an extraction run is of vital interest. It is therefore possible to
deactivate unused positions. The position valve of a deactivated position remains closed throughout
the whole extraction process. Only the activated positions are flushed with solvent. It is important to
note that an empty extraction cell has to be placed into a deactivated position. This is to achieve uni-
form temperature distribution throughout the whole heating block and to make sure that the lift is not
at an incline when closed.
All extraction positions are deactivated by default. It is possible to activate all positions
together or each individually.