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4.4.7 Connect Transducer Wiring
If the downstream process pressure regulation is required by the application, a
pressure transducer can be used to provide a 4-20mA, 1-5V, or 0-10V feedback
signal. Figure 3 shows wiring for a 2-wire 4-20mA transducer. The wiring of
three and four wire transducers are shown in section 4.5.1, Transducer Wiring
Configurations.
Check to ensure that the external feedback voltage/current select jumper is
installed for 4-20mA or removed for 1-5V operation. There is no jumper on the
0-10V external feedback ER3000 models.
4.4.8 Connect Pressure to the System
Figure 3 illustrates the typical pressure connections for the ER3000.
The
ER3000 inlet pressure is the supply pressure (max 120 psi). The exhaust port on
the ER3000 is used for venting when a pressure reduction is required. The inlet
pressure to the regulator depends on the capability of the regulator and the
system requirements.
The output pressure is the regulated pressure being
supplied to the process.
The gauge port can have a pressure gauge attached or simply plugged. If
desired, the gauge port can be used as the output (the normal output port must
then be plugged).
4.4.9 Tune the System
The system should now be fully installed. The system performance can be
checked using the Windows ER3000 (CVI) program or the DOS Tune program
provided. The tuning parameters can be updated using these programs to alter
the ER3000 and system performance. Refer to the Tuning Procedure section for
details on tuning the pressure control system.
16 ER3000 User Manual
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