Heidolph Hei-VAP, Operating Manual

Page: 36 / 96

Operation
36
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 fl ask. Setting range is
between 10 and 280 rpm.
Max. power pump Setting the maximum suction power of vacuum pump. Setting
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 Steps
Changes the sub-menu for programming the pressure-time
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 atmospheric
pressure.
1. Select the pressure/time step to be changed by turning the rotary pushbutton
controller Hei-GUIDE (6).
2. Confi rm 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..