VACUUBRAND MV 2 NT VARIO - Manual (Page 35)

page 35 of 106
Connect the pressure transducer via hose or small flange
connection to the vacuum application. Do not mount the
pressure transducer directly at the pump but close to the
application. The cross-section of the tubing should be as
large as possible.
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
position where to connect the pressure transducer.
Position the pressure transducer and its vacuum line in
such a way that condensate cannot flow towards the pres-
sure transducer. Condensate and deposits will affect the
measurement results. Clean the pressure transducer, if
necessary. See section “Cleaning the pressure transduc-
er”, pg. 66.
Installing the hose nozzle at the VSK 3000:
Unscrew the small flange. Slip hose nozzle with clamping
ring onto the vacuum connection and fasten with union
nut.
VACUU•BUS
The CVC 3000 controller uses VACUU•BUS protocol to
read out the pressure transducer via VACUU•BUS line.
Maximum cable length inside buildings: 32yd (30m).
VACUU•BUS extension cable 2.2 yd (2 meters): order-no.
612552.
During operation
➨
Vent and dispose of potentially dangerous gases or
vapors at the outlet of the pump appropriately.