Genevac HT-8 & HT-12 Series II Evaporating Systems
04-4541
Issue 1-9 – June 2008
Page 31 of
64
Heat-Off Elapsed Time
End-of-Run Option
End-of-Run Elapsed Time
End of Run Defrost and Drain
Pressure Control Regime
Full Vacuum
Controlled Pressure
Dri-Pure
NOT AVAILABLE FOR LYOPHILISATION
(Very Low rotor speed)
Variable Dri-Pure
NOT AVAILABLE FOR LYOPHILISATION
(Very Low rotor speed)
This can be in a range of 0 (lamps off for the entire
run) to 99 hours 59 minutes.
This option is the elapsed time after which the run
will be stopped.
Press
ENTER
and input the time after which you
want the run to stop.
This can be in the range of 1 minute to 99 hours 59
minutes.
Press
ENTER
to toggle between
Yes
and
No
. Only
available between linked runs and is typically used to
remove mixed solvents – See Annex A Page 55.
Press
ENTER
to display the
Select Pressure
Control Option
drop down menu.
Use the
Up-Down
cursor keys to select the pressure
option required.
Full Vacuum
will take the chamber pressure down
to the vacuum capability of the pump.
When the
Controlled Pressure
option is selected,
the
Controlled Pressure
field will be displayed.
Move down to this field using the
DOWN
cursor key
and press
ENTER
.
Input the pressure you want the chamber to be
limited to in the range of 0 to 500 mbar.
DRI-PURE
reduces the vacuum over a
predetermined period to 50 mbar, then goes to the
control pressure as set by the user.
This feature is particularly useful in preventing
bumping, (the violent boiling of solvents), resulting in
solvents being expelled, which is a source of cross
contamination of samples.
Bumping can also cause products to be deposited on
the glass lenses of the Coolheat lamps, which
eventually results in breakages.
Note that during the
DRI-PURE
cycle, which is
approximately 40 minutes, the Coolheat function will
be disabled.
Variable Dri-Pure
allows the user the option to set:
1) The pressure at which the vacuum ramp will
start.
2) The pressure at which the vacuum ramp will end.
3) The total duration of the vacuum ramp.
4) Final Controlled Pressure.
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