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provide other measures to avoid backflow of condensate
towards the pump.
When assembling, ensure
vacuum-tightness
. After as-
sembly, check the whole system for leaks.
Secure hose connections at the pump appropriately, e.g.,
with hose clamps, to protect against accidental detach-
ment.
To reduce pump noise emanating from the pump exhaust
port, connect an exhaust hose or use a silencer (see “Ac-
The VACUUBRAND controller CVC 3000 can only be oper-
ated with components compatible with the VACUUBRAND
VACUU•BUS system, (see “Accessories”, pg. 89).
The vacuum controller CVC 3000 controls VACUUBRAND
diaphragm pumps NT and optional in-line, coolant, and
venting valves. Connected components (e.g., venting
valve, level sensor, external pressure transducer 3000 se-
ries) are automatically identified and configurated.
Identi-
cal components must be configurated beforehand; infor
-
mation upon request.
Do not use more than one controller within the same
VACUU•BUS system. Several controllers in the same
VACUU•BUS system will interfere with each other and
result in error messages of the connected compo-
nents (pumps, valves).
CVC 3000
The CVC 3000 is equipped with an internal capacitive
pressure transducer with ceramic diaphragm. It measures
the actual pressure independently of the gas type, and
with reference to the vacuum, i.e., absolute.
Inside a vacuum system where evaporation occurs, e.g.,
a rotary evaporator, the vacuum is not uniform. For ex-
ample, 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
