WIKA CPC3000 - Manual (Page 21)

Pneumatic High-Speed Pressure Controller CPC3000
WIKA Operating Instruction Pneumatic High-Speed Pressure Controller ∙ Version 1.1 21
11498171.01 08/2009 GB
5.7 Function of pressure connections
MEASURE/CONTROL port
Below the label "MEASURE/CONTROL" is a pressure connection. In MEASURE mode
this connection connects the pressure applied to the internal sensor where the pressure
is measured (within the range of the internal sensor). In CONTROL mode this connection
supplies an output pressure controlled by the internal regulator at the commanded setpoint.
SUPPLY port
Below the label "SUPPLY" is a pressure connection. This connection should be supplied
with a pressure that is approximately equal to 110 % of the full scale pressure of the inter-
nal sensor. In other words, 10 % above the full scale pressure of the internal sensor (see
“SUPPLY Pressure” in the specifications chapter for supply pressure and pressure media
requirements.)
EXHAUST/VACUUM port
Below the label "EXHAUST/VACUUM" is a pressure connection.
If a sub-atmospheric control pressure is required a vacuum pump must be connected to
this port. Otherwise, this port may be left open to atmosphere.
The user must use caution when controlling from a very high pressure
down to a very low pressure when a vacuum pump is connected to the
exhaust port. Large volumes of gas may be present in the device under
test and will exhaust through the EXHAUST/VACUUM port in excess of
the capacity of the internal relief valve, possibly causing damage to the
vacuum pump.
VENT outlet
Below the label "VENT" is the pressure outlet. In VENT mode the pressure within the system
is released through this outlet.
HIGH SOUND LEVELS! Pressures from 40 bar and up can generate sound
levels above 100 db for brief periods when they are exhausted directly to
atmosphere. If no muffling devices are attached to the EXHAUST/VACUUM
and VENT port, then ear protection is advised for personnel in the vicinity
of the instruments that will be operated under such conditions.
REFERENCE port
On gauge units this port is connected to the reference side of the transducer, and on
absolute units it is internally capped. This port is normally left open to atmosphere.
The controller must be protected from over pressure.
Pipes, couplings and other components used for connecting the supply
exhaust and the MEASURE/CONTROL port must be suitable for the appli-
cation and rated for the applied pressures.
The user must ensure that the pressure media are clean and dry. If neces-
sary, the internal sensors and mechanisms must be protected by using a
liquid trap or coalescing filter.
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Warning
Warning
Warning