Start Pressure Ramp - Heidolph Hei-VAP Precision Manuel D'utilisation

EN
Operation of the Hei-VAP Precision
Start pressure
ramp
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The following values can be changed in the menu view:
Heating bath Setting of the bath temperature. Setting range is between 20
°C and max. heating bath temperature (MAX TEMP is ad-
justable in Setup) with a highest range of 210 °C.
Rotation Setting of rotation speed of the distillation flask. Setting
range between 20 and 280 rpm.
Max. power pump Setting the maximum suction power of vacuum pump. Set-
ting range from 10 to 100%. A reduction of the suction power
results in a higher return rate of the solvent.
Hysteresis Setting the pressure difference of the target value at which
the vacuum is re-adjusted. Setting range 1 – 50mbar
(only by using value controlled pump Rotavac valve control
or Rotavac valve tec, or House vacuum.)
Enter Pressure/Time Changes the sub-menu for programming the pressure-time
Steps ramps.
1. The data record can be saved by using softkey "Store Favorite" (1).
2. Softkey "Esc" (1) discards the changes and returns to the actual value display.
3. The gradients can be entered in sub-menu "Enter pressure/time steps".
4. Up to 20 gradient steps can be entered, whereby each gradient step consists of
pressure and time.
The pressure and time can be set in each line. However, the Sum
of time cannot be set, since this is automatically calculated.
The starting point is always at a time value of 0 and the atmos-
pheric pressure.
1. Select the pressure/time step to be changed by turning the rotary pushbutton con-
troller Hei-GUIDE (6).
2. Confirm the selection by pressing the Hei-GUIDE (6).
3. The value can be changed by turning the Hei-GUIDE (6) to the left or right.
4. The current setting is accepted by pressing the Hei-GUIDE (6).
The data record can be saved by using softkey "Store Favorite" (1).
Softkey "Esc" (1) discards the changes and returns to the actual value display.
A graphic overview of the programmed ramp is displayed by using softkey "Graph" (1).
The gradient diagram presents the time on the x-axis in [min] and the related pressure
on the y-axis in [mbar].
The scaling of the x and y axes is illustrated so that all of the entered times or pressures
are illustrated.
The entry "enter basic settings" returns to the time-unrelated basic values of the heating
bath, rotation, hysteresis, and the max. power pump.
6.12.2

Start pressure ramp

The pressure ramp is started with softkey "start all" (1) or "start vacuum" (1). The pres-
sure/time segments are processed.
Note: The maximum attainable increase of the pressure/time curve is limited by the
pump capacity and the leak rate of the system.
The process is terminated when reaching the last entry. The vacuum control is switched
off, the system is ventilated. The lift is raised with a motorized lift. The heating bath is
switched off depending on the setting in the setup.
Hei-VAP Precision