Heidolph Hei-VAP Precision Originalbetriebsanleitung Seite 26

Menu display
The following values can be changed in the menu view:
Heating bath
Rotation
Distillation rate
(dT)
Max. power pump
Hysteresis
Multiple solvents
Final pressure
Timer
Selecting the entry by turning the Select Knob Hei-GUIDE (6)
1. Call up the selected entry to be changed by pressing the Select Knob Hei-GUIDE (6)
(entry will be highlighted in orange).
2. Set the value by using the Select Knob Hei-GUIDE (6).
3. Pressing it again confirms the change. Softkey „Esc" (1) terminates the change of the
currently processed entry.
Multiple solvent distillation = no:
Must be selected if the first vapor point must be calculated and the pressure should
not be reduced further; for example, when roughly separating 2 solvents.
The resulting pressure is accepted as target value for the vacuum. The pressure (after
reaching the vapor point) cannot be reduced further in the system when the
temperature at the AUTOaccurate sensor drops.
Multiple solvent distillation = yes:
This must be selected if the pressure should be reduced further after detecting the
first vapor point; for example, for completely distilling solvent mixtures.
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Operation
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.
Setting of rotation speed of the distillation flask. Setting range is
between 10 and 280 rpm.
Setting of the distillation rate. Setting range is between 1 and 10.
A high numeric value leads to a higher rate of distillation.
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. (only by using rpm-controlled pump Rotavac vario control
or Rotavac vario tec.)
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 value
controlled pump Rotavac valve control, Rotavac valve tec, or
house vacuum.)
If multiple solvents is set to „no" then the pressure is not reduced
further after the detection of the first boiling point.
If multiple solvents is set to „yes" then the pressure is reduced
until the user defined final pressure is reached.
Setting of the absolute pressure where the distillation process is
terminated. Setting range is between 1 mbar and the safety pres-
sure (see setup for Safety Pressure).
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).
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