VACUUBRAND Liquid level sensor - Manual (Page 3)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check care-
fully the validity of this document with respect to his product. Manual-no.: 999189 / 12/03/2013
page 3 of Seite 4
If the sensor alarms the controllers VNC 2 and CVC 3000 until software version 2.12 stop an active
process at once to avoid an overflow of the catchpot. The CVC 3000 with software version 2.13 stops
an active process after 30 minutes and from software version 2.14 after 5 minutes.
If a process stop may lead to a dangerous situation take appropriate safety measures.
Attention: The error message ”full catchpot” has to be quit by pressing key on/off at the controller CVC
3000 (obey reset time), at the controller VNC 2 the error message disappears automatically when the
fault is eliminated. A reset of the error message if the sensor has been removed is only possible by
choosing the factory set configuration.
After draining the catchpot (obey regulations for disposal) the process has to be restarted by pressing
key Start/Stop (CVC 3000) or pressing key ”Enter” (VNC 2).
We recommend to check the function of the level sensor after first assembly and than regularly (depend-
ing on operation conditions): Fill the catchpot with liquid, the level sensor must alarm. The release time
is 10 seconds.
In case of false alarm (empty catchpot) it might be necessary to adjust the sensor using the individual
catchpot.
Individual positioning of the level sensor at the condensate flask 1000 ml
- Fill solvent into the condensate flask until the desired liquid level is achieved.
- Connect level sensor to controller and switch on controller.
- Assemble the liquid level sensor loosely at the top of the condensate flask.
- Bring the sensor close to the liquid surface until the sensor becomes activated.
- Fix level sensor by closing the straps.
1013 . 2
mbar
Vac control 1013mbar
Ext. Err.
Display CVC 3000 Display VNC 2
Level sensor alarm
The level sensor becomes activated if the liquid level in the catchpot reaches the position of the sen-
sor.
An acoustic signal is given only if ”Sound On” is selected at the controller.
Controller CVC 3000: Display of a flashing catchpot and a warning triangle and flashing display (10
blips).
Controller VNC 2: Display ”Ext. F.” and flashing display (9 blips).
Note: Strong electromagnetic fields may influence the alarm level of the capacitive measurement ele-
ment.
Connecting to a controller
Plug in the connection cable of the level sensor on a switched-off VACUUBRAND vacuum controller
CVC 3000 or VNC 2 (use Y adapter VACUU•BUS (VACUUBRAND cat. no: 636656) if necessary).
When switching on the controller the level sensor is detected automatically. The display shows a symbol
for the sensor only if the sensor alarms or in case of an error.
When coming near hands or objects the release of an unintentional message is possible.
The sensitivity of the sensor is adjusted at the factory in a way to detect also nonpolar liquids.
Disconnecting the sensor plug from a switched-on controller leads to an error message.