VACUUBRAND CVC 3000 - Manual (Page 27)

page 27 of 80
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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 controller and its
vacuum line in such a way that condensate
cannot flow towards the pressure transduc-
er. Condensate and deposits will affect the
measurement results. Clean the pressure
transducer, if necessary. See section “Clean-
ing the pressure transducer”, pg. 60.
- 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.
measurement
connection
Attention: Never use a pointed or sharp-edged tool to
clean the pressure transducer.
Never touch the ceramic diaphragm of the pressure
transducer with hard objects.
➨
Fill the measurement chamber with a solvent (e.g., benzene) and al-
low sufficient cleaning time. Observe all regulations concerning usage
and disposal of solvents!
➨
Drain the solvent and dispose of in accordance with regulations. Re-
peat cleaning if necessary.
➨
Rinse the measurement chamber several times with alcohol in order
to remove all solvent residues.
NOTICE
Cleaning the pressure transducer