VACUUBRAND CVC 3000 detect - Manual (Page 27)

page 27 of 74
Notes on connecting and operating the controller
The vacuum controller CVC 3000 detect is fitted with an in-line valve
VV-B 6C at its rear.
The controller can switch a possibly connected coolant and/or venting
valve.
The CVC 3000 detect is equipped with an internal capacitive pressure
transducer with ceramic diaphragm. It measures the actual pressure in-
dependently of the gas type, and with reference to the vacuum, i.e., ab-
solute.
➨
Connect the vacuum connection of the controller to the vacuum appli-
cation and to the vacuum pump.
+
Maximum permissible pressure: 21.8 psi (1.5 bar) ab-
solute.
Attention: At pressures above approximately 795 Torr
(1060 mbar) the pressure reading becomes incorrect
due to saturation of the pressure transducer. The dis-
play flashes. Release pressure immediately! Risk of
bursting!
- Position the CVC 3000 detect controller and
its vacuum line in such a way that conden-
sate cannot flow towards the pressure trans-
ducer. Condensate and deposits will affect
the measurement results. Clean the pressure
transducer, if necessary. See section “Clean-
ing the pressure transducer”, pg. 53.
- Inside a vacuum system where evaporation occurs, e.g., a rotary
evaporator, the vacuum is not uniform. For example, a condenser can
act as a pump, or the vacuum in the connecting tubing can be higher
or lower than in the application itself. This affects the measurement
results as well as the control levels. Therefore, carefully choose the
position where to connect the pressure transducer.
- If residues occur or when working with aggressive or condensable
substances, install a gas washing bottle in front of the pressure trans-
ducer.
vacuum
connection
to application