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Menu details
Pump
Modes
Automatic (VC 10 pro):
In the "Modes" menu, the user can enable automatic boiling point
recognition by selecting the "Automatic" menu item. No other pa-
rameters must be set.
The boiling point is detected automatically. For rotary evaporators
with heating bath, it must be ensured that the tempering medium
and solvents have a constant temperature (e.g. 60 °C).
Manual:
In the "Manual" menu item, the target value can be specified (e.g.
in "mbar"). The system is evacuated until the target value.
Refrigerated circulator
Start after...:
Specifies a delay before the refrigerated circulator start operating.
Temperature:
Determines the temperature, that the refrigerated circulator is operated.
Cleaning
Modes
Refrig. Circulator
Cleaning
The cleaning of the pump ensures that solvent residues are removed
in the pump after the measurement. For this purpose, the pump is
operated at a low level while the system is vented. The air flowing
through the pump ensures that the solvent residues are discharged
from the pump. If the cleaning option is selected, this starts once
the measurement has finished (see "Actions after stop").
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Pump %
By selecting the "Pump %" menu item, the pump can be operated
continuously with a running performance of between 100 % and 1 %.
Program
Under the "Programs" menu, 10 user-defined pressure-time profi-
les can be created. The last measurement taken can also be view-
ed in this menu and saved as a program.
The target value and the running performance can only be entered
within the set limits (see menu item "Limits").
Changing to the working screen and pressing the rotating/pressing
knob starts the process. Pressing the knob again stops the process.
If no speed-controlled pump with
NOTICE
analogue connection is connected
to the "VACSTAR" interface, the
system can only work in manual
mode and in "two-position con-
trol" mode. The menu items "Auto"
and "Pump %" are greyed out and
cannot be activated.
Pump speed:
Determines the speed in rpm, that the refrigerated circulator is
operated
Cool now:
If you want to perform a cooling immediately, you can select it
with this setting.
Stop now:
If you want to stop the cooling immediately, you can select it with
this setting.
The "Cleaning" menu item increa-
NOTICE
ses the service life of the pump,
since solvent residues do not re-
main inside the pump.
You can also clean the pump without using the corresponding
menu item. To do this, remove the hoses and operate the pump
at the end of a working cycle (test, test series, end of the day ...)
at idling speed.
Start after...:
Specifies after which minimum duration of a measurement the
cleaning should take place. The default time is 5 minutes. This
means that a measurement must be run for at least 5 minutes, so
that cleaning is performed at the end of the measurement.
Duration:
Specifies how long the cleaning process should be performed.
Pump speed:
Determines at what power (in %) the pump is operated during
cleaning. If the power is set too high this can lead to a pressure
drop in the system.
Clean now:
If you want to perform a cleaning, you can select it with this setting.
Limits
Modes
Refrig. Circulator
Limits
Hysteresis (VC 10 pro)
Modes
Refrig. Circulator
Hysteresis
Solvent Library (VC 10 pro)
Modes
Refrig. Circulator
Solvent libary
Actions after stop
Modes
Refrig. Circulator
Actions after stop
Actions after start
Refrig. Circulator
Cleaning
Limits
Hysteresis
Solvent library
Actions after stop
Actions after start
In this menu, limits for the target value can be set.
With the "Hysteresis" option, the switching frequency and control
accuracy can be influenced when in a steady state. The hysteresis
value determines the upper and lower limits of the target value
and therefore the closing and opening of the pump and valve
(only for two-position control).
Automatic: Hysteresis is always 10 % of the actual pressure.
Manual: Manual value specification of hysteresis.
Limits which are too narrow shor-
NOTICE
ten the service life of the devices.
In the "solvent library", the most common solvents are assigned a
function to determine the steam temperature at the set pressure
and vice versa. This provides assistance when setting these para-
meters in manual mode, for example, evaporation processes with
a rotary evaporator.
This menu allows the user to define actions that should be perfor-
med when a test has ended.
This menu allows the user to define actions that should be perfor-
med when a test has started.
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