User guide

1
IM 12D08N05-01E
1 INTRODUCTION AND GENERAL DESCRIPTION
The Yokogawa EXAxt SC450G is a converter
designed for industrial process monitoring, mea-
surement and control applications. This instruction
manual contains the information needed to install,
set up, operate and maintain the unit correctly.
This manual also includes a basic troubleshooting
guide to answer typical user questions.
Yokogawa can not be responsible for the perfor-
mance of the EXAxt converter if these instructions
are not followed.
1-1. Instrument check
Upon delivery, unpack the instrument care-
fully and inspect it to ensure that it was not
damaged during shipment. If damage is found,
retain the original packing materials (including
the outer box) and then immediately notify the
carrier and the relevant Yokogawa sales office.
Make sure the model number on the nameplate
affixed to the top of the instrument agrees with your
order. Example of the nameplate is shown below.
C US
STYLE
Made in Japan
N200
-20 to +55 °C
4-20mA(mA1: +HART)
NO.
AMB. TEMP.
OUTPUTS
SUPPLY
SUFFIX
MODEL
NI CL I, DIV 2, GROUPS ABCD
T6 FOR Ta -20 to +55°C
R
SEE INSTRUCTION MANUAL
TYPE 4X
SEE CONTROL DRAWING
NFM016-A9 P.1
CONDUCTIVITY /RESISTIVITY TRANSMITTER
SC450G
KCC-REM-
YHQ-EEN257
Figure 1-1. Nameplate
Note! The nameplate will also contain
the serial number and any relevant
certification marks. Be sure to apply
correct power to the unit, as detailed
on the nameplate.
1-2. Application
The EXAxt converter is intended to be used for
continuous on-line measurement of Conductiv-
ity, Resistivity and/or Concentration in industrial
installations. The unit combines simple opera-
tion and microprocessor-based performance
with advanced self-diagnostics and enhanced
communications capability to meet the most
advanced requirements. The measurement
can be used as part of an automated process
control system. It can also be used to indicate
operating limits of a process, to monitor product
quality, or to function as a controller for a dos-
ing/dilution system.
Sensors should normally be mounted close to
the converter in order to ensure easy calibra-converter in order to ensure easy calibra- in order to ensure easy calibra-
tion and peak performance. If the unit must
be mounted remotely from the sensors, WF10
extension cable can be used, up to a maximum
of 50 metres (150 feet), with a BA10 junction
box, and up 10 metres standard sensor cable.
The EXAxt is delivered with a general purpose
default setting for programmable items (see
Chapter 5). While this initial configuration
allows easy start-up, the configuration should
be adjusted to suit each particular application.
An example of an adjustable item is the type
of temperature sensor used. The EXAxt can
be adjusted for a number of different types of
temperature sensors.
Details provided in this instruction manual
are sufficient to operate the EXAxt with all
Yokogawa sensor systems and a wide range
of third-party commercially available probes.
For best results, read this manual in conjunc-
tion with the corresponding sensor instruction
manual.
Yokogawa designed the EXAxt converter to
withstand industrial environments. It meets all
the CE regulatory standards. The unit meets or
exceeds stringent requirements (see section
2) without compromise, to assure the user of
continued accurate performance in even the
most demanding industrial installations.
1. INTRODUCTION AND GENERAL DESCRIPTION