Notes on operation – VACUUBRAND VNC 2 E User Manual
Page 17
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999199 / 28/11/2012
Notes on operation
For operation it is necessary to install valves and/or vacuum pumps. Without those components,
the controller will work only as a vacuum measurement device. As such the controller will switch
a possibly connected coolant valve.
- Inside a vacuum system where evaporation occurs, the
vacuum is not uniform. This effects the value of the meas-
ured pressure and such the controlling. Therefore carefully
choose the position where to connect the pressure trans-
ducer.
- Condensate and deposits at the pressure transducer fal-
sify the measurement result.
- If residues occur or when working with aggressive or con-
densable substances, install a gas washing bottle in front
of the pressure transducer.
-
Position controller in such a way, that condensate can
not flow into the pressure transducer.
- If necessary, clean the pressure transducer, see section
„Cleaning the pressure transducer“, pg. 36.
☞
Setting of interface parameters, see
„Interface parameters“, pg. 26.
☞
Presettings at controller, see „Menu structure of controller“, pg. 18.
☞
Operating the controller, see
„Working with the controller“, pg. 21.
Note: Texts written in Courier font mirror the display of the LCD of the controller.
Connecting an external pressure transducer VSK 3000 will automatically replace the internal pressure
transducer as active sensor. The display will show the vacuum measured by the VSK 3000, the vacuum
connection of the controller is rendered inoperable.
☞
Attention: At pressures above approximately 1100 mbar the pressure reading
becomes incorrect due to saturation of the pressure transducer.
Release pressure immediately! Risk of bursting!
At pressures above 1060 mbar the
display flashes.
Maximum permissible pressure: 1.5 bar absolute.
When switching on the controller VNC 2 for the very first time, a menu to select the language of the
controller menu is displayed. Select the desired language (”Deutsch”, ”English”, ”Français”) using the
keys t and s, and press ”Enter” to confirm. Then select the pressure unit (”mbar”, ”Torr” or” hPa”) in
the same way.
vacuum connection to application
to pump