Heidolph Hei-VAP Precision Manuel D'utilisation page 58

EN
Operation of the Hei-VAP Precision
52
6.9.1 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.
Distillation rate (dT) Setting of the distillation rate. Setting range is between 1 and
10. A high numeric value leads to a higher rate of distillation.
Max. power pump Vacuum pump (Vario Models) throughput % to maximize
pump power. Setting range is between 10 and 100 %. Re-
duction of the throughput leads to higher solvent recovery
rates. (only by using rpm controlled pump Rotavac vario
control or Rotavac vario tec.)
Hysteresis The value of the hysteresis indicates how much the pressure
may rise (in mbar) before the vacuum valve is opened. Set-
ting range is between 1 and 50 mbar. (only by using value
controlled pump Rotavac valve control, Rotavac valve tec, or
House vacuum.)
Multiple Solvents 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 re-
duced until the user defined final pressure is reached.
Final pressure Setting of the absolute pressure where the distillation proc-
ess is terminated. Setting range is between 1 mbar and the
safety pressure (see Setup for Safety Pressure).
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.
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 (af-
ter reaching the vapor point) cannot be reduced further in the system when the tem-
perature at the Auto
accurate
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.
The entry "final pressure" can be only selected with the entry " Multiple distillation = yes".
If the temperature on the
accurate
duced until
a.) the control temperature is reached again or
b.) the final pressure is reached.
The system responds similar to "stop all" in case b.) (see 6.14).
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).
sensor drops.
sensor drops, the pressure in the system is further re-
Hei-VAP Precision