Heidolph Hei-VAP Precision - Manual (Page 35)

Operation Operation
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WARNING Imploding glass devices!!
Serious injuries from shattering glass.
Check glass devices for damages (stars, breaks, etc.).
Only use perfect glass devices and replace all damaged glassware
as soon as possible.
SET
pressure
mode
The vacuum is controlled and maintained at the set pressure in the SET
pressure
mode.
Menu display
The following values can be changed in the menu view:
Heating bath
Setting of the bath temperature. Setting range is between
20 °C and maximum heating bath temperature (MAX TEMP is
adjustable in Setup) with a highest range of 210 °C.
Rotation
Setting of rotation speed of the distillation flask. Setting
range is between 10 and 280 rpm.
Vacuum
Setting of the absolute pressure in the rotary evaporating
system. Setting range is between 1 and safety pressure
(SAFETY PRESSURE is adjustable in Setup) with a high limit
of 1200 mbar.
Max. power pump
Vacuum pump (Vario Models) throughput % to maximize
pump power. Setting range is between 10 and 100 %.
Reduction of the throughput leads to higher solvent
recovery rates.
Hysteresis
The value of the hysteresis indicates how much the pressure
may rise (in mbar) before the vacuum valve is opened.
Setting range is between 1 and 50 mbar (only by using valve
controlled pumps Rotavac valve control, Rotavac valve tec, or
House vacuum source).
Timer
Setting of the timer to shut down the process. Setting range
is between 1 and 1440 minutes. For continuous operation
choose “off” for Timer setting. The heating bath at the end
of a timed run can be set to turn off (Parameter found in
Setup).
Selecting the entry by turning the Hei-GUIDE (6)
1. Call up the selected entry to be changed by pressing the Hei-GUIDE (6) (entry will be
highlighted in orange).
2. Set the value by using the rotary pushbutton controller Hei-GUIDE (6).
3. Pressing it again confirms the change. Softkey “Esc“ (1) terminates the change of the
currently processed entry.
4. The new settings are accepted by the “accept” entry. It is changed to the actual value
display.
All changes in the menu view are discarded with softkey “Esc“ (1).
The parameters are stored under a name to be selected by using softkey “Store
Favorite“ (1).
Actual value display
The evaporator is in the SET
pressure
mode
Rotation speed and heating bath can be changed as described in chapter “Operation“ –
“Setting the rotation speed” and “Setting the heating bath temperature”.
Vacuum control
1. Select the entry “vacuum” by turning the Hei-GUIDE (6) and calling up the selected
entry to be changed by pressing the Hei-GUIDE (6) again.
2. Set the absolute pressure by using the rotary pushbutton controller Hei-GUIDE (6).
The pressure is readjusted synchronously at an active vacuum control.
3. Pressing it again confirms the change.
4. The entry is exited after 10 seconds, in order to rule out accidental adjustments.
The setting range of the menu entry “vacuum” can be set between 1
and the safe pressure in [mbar], however, not higher than 1200 mbar.
Softkey “Start all” and “Stop all”
A distillation can be started and stopped automatically by using softkey “Start all” (1)
and “Stop all” (1), as described in chapter “Operation“ – “Setting the rotation speed” and
“Setting the heating bath temperature”.