WIKA CPC6000 - Manual (Page 28)

Automated Pressure Calibrator
CPC 6000
28 Mensor/WIKA Operating Instructions - CPC 6000
5.5.3 Exhaust Port
If sub-atmospheric control pressure is required a vacuum pump must be connected to the EXHAUST
port. Otherwise, this port may be left open to atmosphere.
5.5.4 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 but may be attached to a snubber
assembly on very low pressure instruments.
5.5.5 Remote Bus Connections
See Section 7 , Remote Operation, for connections and commands for operation over ethernet, RS-
232 serial port or IEEE-488.
5.5.6 Digital I/O Connection
The Digital I/O connection consists of four
pins.
Pin 1: +5 VDC
Pin 2: Input TTL levels. Voltage input
should be limited to > -0.3 VDC
and < +5.3 VDC.
Pin 3: Output, pulled up to 5V with a
10k ohm resistor. Source limited to
450uA, Sink 10mA.
Pin 4: Ground
(See ‘Digital I/O’ in
Specifications section . Figure 5.5.6 - Digital I/O Connection
5.6 Turning on the CPC 6000
After the pressure connections are secure, apply power to the power connector on the rear of the
instrument and switch the power switch ON. The instrument will go through an initialization process
and system check. As soon as the system check is completed the system will default to an operating
screen similar to Figure 6.3B. Allow at least 15 minutes of warm up before performing critical pressure
measurements.
WARNING: EARTH GROUND! Any power adaptors or surge protection devices that
negate the protective earth ground should not be used.
The power cord is the disconnection device and its outlet should be accessible and
contain a protective earth ground.
WARNING: VENTILATION! Do not block airflow to ventilating fan located on rear of
instrument.
Warning
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Warning
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Warning
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Warning
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