Heidolph Hei-VAP Precision Manuel D'utilisation page 57

The parameters are stored under a name to be selected by using softkey "Store
Favorite" (1).
6.8.2 Actual value display
Prerequisite: The evaporator is in the AUTO
Rotation speed and heating bath can be changed as described in 6.3 and 6.4.
6.8.3 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 8.14.
6.9 Auto Mode
accurate
The vacuum in the Auto
accurate
This mode offers the following advantages:
−
Only low quantities of solvent are suctioned by this vacuum pump.
−
The vapor point is detected automatically and supplemented for mixtures.
−
Multiple solvent distillation is possible without any manual adjustments.
−
Knowledge of the thermodynamic material data is not required.
The system controls the vacuum so that a temperature increase occurs on the AUTO
sensor via the produced vapor quantity. The temperature increase refers to the start-
rate
ing temperature during the de-activated process. It is also necessary that a constant
temperature (Heidolph Rotacool or Rotachill recommended) is present in the condenser
prior to the start of the process. The Hei-VAP Precision automatically checks the tem-
perature consistency and informs the user, if necessary. The temperature difference
between the condenser temperature and the temperature at the AUTO
used for controlling the vacuum will be increased when increasing the Distillation rate
(dT). This results in increasing the distilled solvent quantity per time.
Temperature sensor Auto
10.2). The cooling medium has run for 15 min (Auto
temperature).
A distillation with optimal recurring data results at low values for
the Distillation rate (dT) (1-3).
Low values result in a slow distillation and high values to a quick
distillation.
Select the optimal general conditions.
Auto
configurations.
Hei-VAP Precision
mode
easy
mode is controlled by the temperature sensor Auto
sensor (569-00040-00) is installed (see chapter
accurate
accurate
mode can only be run in G3 and G6 glassware
Accurate
Operation of the Hei-VAP Precision
.
accurate
accu-
sensor
accurate
sensor shows a constant
Starting and clos-
ing distillation
Setting the Auto
ac-
mode
curate
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EN