IM 01C25H01-01E
1-1
1. INTRODUCTION
1.
INTRODUCTION
Thank you for purchasing the DPharp EJX Differential
Pressure and pressure transmitter.
Your EJX Pressure Transmitter was precisely cali-
brated at the factory before shipment. To ensure both
safety and efficiency, please read this manual carefully
before you operate the instrument.
NOTE
This manual describes the hardware configura-
tions of EJX series transmitters. For information
on the software configuration and operation,
please refer to either IM 01C25T03-01E for the
EJX series BRAIN communication type or
IM 01C25T01-01E for the EJX series HART
communication type.
For FOUNDATION Fieldbus protocol type,
please refer to IM 01C25T02-01E.
To ensure correct use of this instrument, read
both the hardware and software manuals thor-
oughly before use.
WARNING
When using the EJX in a Safety Instrumented
Systems (SIS) application, refer to Appendix A in
either IM 01C25T01-01E for the HART protocol
or IM 01C25T03-01E for the BRAIN protocol.
The instructions and procedures in this section
must be strictly followed in order to maintain the
transmitter for this safety level.
NOTE
This manual covers the EJX118A diaphragm
sealed differential pressure transmitter and
EJX438A diaphragm sealed gauge pressure
transmitter.
Unless otherwise stated, the illustrations in this
manual are of the EJX118A diaphragm sealed
differential pressure transmitter.
Users of the EJX438A should bear in mind that
certain features of their instrument will differ from
those shown in the illustrations of the EJX118A.
Regarding This Manual
• This manual should be provided to the end user.
• The contents of this manual are subject to change
without prior notice.
• All rights reserved. No part of this manual may be
reproduced in any form without Yokogawa’s written
permission.
• Yokogawa makes no warranty of any kind with
regard to this manual, including, but not limited to,
implied warranty of merchantability and fitness for a
particular purpose.
• If any question arises or errors are found, or if any
information is missing from this manual, please
inform the nearest Yokogawa sales office.
• The specifications covered by this manual are
limited to those for the standard type under the
specified model number break-down and do not
cover custom-made instruments.
• Please note that changes in the specifications,
construction, or component parts of the instrument
may not immediately be reflected in this manual at
the time of change, provided that postponement of
revisions will not cause difficulty to the user from a
functional or performance standpoint.
• Yokogawa assumes no responsibility for this
product except as stated in the warranty.
• If the customer or any third party is harmed by the
use of this product, Yokogawa assumes no responsi-
bility for any such harm owing to any defects in the
product which were not predictable, or for any
indirect damages.
