YOKOGAWA DpharpEJX vigilantplant EJX510A User manual

User’s
Manual
Y
oko
g
awa Electric Cor
p
oration
EJX510A and EJX530A
Absolute Pressure and
Gauge Pressure Transmitters
IM 01C25F01-01E
IM 01C25F01-01E
3rd Edition

i
CONTENTS
IM 01C25F01-01E
FD No. IM 01C25F01-01E
3rd Edition: July 2006(YK)
All Rights Reserved, Copyright © 2004, Yokogawa Electric Corporation
CONTENTS
1. INTRODUCTION............................................................................................1-1
Regarding This Manual................................................................................. 1-1
1.1 Safe Use of This Product.................................................................... 1-2
1.2 Warranty.............................................................................................. 1-3
1.3 ATEX Documentation.......................................................................... 1-4
2. HANDLING CAUTIONS ................................................................................2-1
2.1 Model and Specifications Check......................................................... 2-1
2.2 Unpacking ........................................................................................... 2-1
2.3 Storage................................................................................................ 2-1
2.4 Selecting the Installation Location ...................................................... 2-2
2.5 Pressure Connection........................................................................... 2-2
2.6 Waterproofing of Cable Conduit Connections .................................... 2-2
2.7 Restrictions on Use of Radio Transceivers ........................................ 2-2
2.8 Insulation Resistance and Dielectric Strength Test............................ 2-2
2.9 Installation of an Explosion-Protected Instrument .............................. 2-3
2.9.1 FM Approval ................................................................................. 2-3
2.9.2 CSA Certification .......................................................................... 2-5
2.9.3 CENELEC ATEX (KEMA) Certification ........................................ 2-7
2.9.4 IECEx Certification ..................................................................... 2-10
2.10 EMC Conformity Standards .............................................................. 2-11
2.11 Pressure Equipment Directive (PED) ............................................... 2-11
2.12 Low Voltage Directive ....................................................................... 2-12
3. COMPONENT NAMES..................................................................................3-1
4. INSTALLATION.............................................................................................4-1
4.1 Precautions ......................................................................................... 4-1
4.2 Mounting.............................................................................................. 4-1
4.3 Rotating Transmitter Section .............................................................. 4-2
4.4 Changing the Direction of Integral Indicator ....................................... 4-3
5. INSTALLING IMPULSE PIPING ...................................................................5-1
5.1 Impulse Piping Installation Precautions .............................................. 5-1
5.1.1 Connecting Impulse Piping to a Transmitter................................ 5-1
5.1.2 Routing the Impulse Piping .......................................................... 5-1
5.2 Impulse Piping Connection Examples ................................................ 5-2
6. WIRING..........................................................................................................6-1
6.1 Wiring Precautions .............................................................................. 6-1
6.2 Selecting the Wiring Materials ............................................................ 6-1
6.3 Connections of External Wiring to Terminal Box................................ 6-1
6.3.1 Power Supply Wiring Connection ................................................ 6-1
6.3.2 External Indicator Connection ...................................................... 6-1
6.3.3 Communicator Connection........................................................... 6-1
6.3.4 Check Meter Connection.............................................................. 6-2
6.3.5 Status Output Connection ............................................................ 6-2

ii
CONTENTS
IM 01C25F01-01E
6.4 Wiring .................................................................................................. 6-2
6.4.1 Loop Configuration ....................................................................... 6-2
(1) General-use Type and Flameproof Type ..................................... 6-2
(2) Intrinsically Safe Type ................................................................. 6-2
6.4.2 Wiring Installation ......................................................................... 6-2
(1) General-use Type and Intrinsically Safe Type ............................. 6-2
(2) Flameproof Type ......................................................................... 6-3
6.5 Grounding............................................................................................ 6-3
6.6 Power Supply Voltage and Load Resistance ..................................... 6-3
7. OPERATION..................................................................................................7-1
7.1 Preparation for Starting Operation...................................................... 7-1
7.2 Zero Point Adjustment ........................................................................ 7-2
7.3 Starting Operation ............................................................................... 7-3
7.4 Shutting Down the Transmitter ........................................................... 7-3
7.5 Setting the Range Using the Range-setting Switch ........................... 7-3
8. MAINTENANCE.............................................................................................8-1
8.1 Overview ............................................................................................. 8-1
8.2 Calibration Instruments Selection ....................................................... 8-1
8.3 Calibration ........................................................................................... 8-1
8.4 Disassembly and Reassembly............................................................ 8-3
8.4.1 Replacing the Integral Indicator ................................................... 8-3
8.4.2 Replacing the CPU Board Assembly ........................................... 8-4
8.4.3 Cleaning and Replacing the Capsule Assembly.......................... 8-4
8.5 Troubleshooting................................................................................... 8-6
8.5.1 Basic Troubleshooting.................................................................. 8-6
8.5.2 Troubleshooting Flowcharts ......................................................... 8-6
8.5.3 Alarms and Countermeasures ..................................................... 8-8
9. GENERAL SPECIFICATIONS ......................................................................9-1
9.1 Standard Specifications ...................................................................... 9-1
9.2 MODEL AND SUFFIX CODES........................................................... 9-4
9.3 OPTIONAL SPECIFICATIONS ........................................................... 9-5
9.4 DIMENSIONS...................................................................................... 9-7
REVISION RECORD
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.

IM 01C25F01-01E
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 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, or IM 01C25T02-01E for
the EJX series FOUNDATION Fieldbus Commu-
nication type.
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 EJX510A Absolute
pressure transmitter and EJX530A gauge
pressure transmitter.
Unless otherwise stated, the illustrations in this
manual are of the EJX530A gauge pressure
transmitter.
Users of the EJX510A should bear in mind that
certain features of their instrument will differ from
those shown in the illustrations of the EJX530A.
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 responsibilities 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.

IM 01C25F01-01E
1-2
1. INTRODUCTION
•The following safety symbols are used in this
manual:
WARNING
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate
injury. It may also be used to alert against
unsafe practices .
IMPORTANT
Indicates that operating the hardware or software
in this manner may damage it or lead to system
failure.
NOTE
Draws attention to information essential for
understanding the operation and features.
Direct current
1.1 Safe Use of This Product
For the safety of the operator and to protect the
instrument and the system, please be sure to follow this
manual’s safety instructions when handling this
instrument. If these instructions are not heeded, the
protection provided by this instrument may be im-
paired. In this case, Yokogawa cannot guarantee that
the instrument can be safely operated. Please pay
special attention to the following points:
(a) Installation
•This instrument may only be installed by an engi-
neer or technician who has an expert knowledge of
this device. Operators are not allowed to carry out
installation unless they meet this condition.
•With high process temperatures, care must be taken
not to burn yourself by touching the instrument or
its casing.
•Never loosen the process connector nuts when the
instrument is installed in a process. This can lead to
a sudden, explosive release of process fluids.
•When draining condensate from the pressure
detector section, take appropriate precautions to
prevent the inhalation of harmful vapors and the
contact of toxic process fluids with the skin or eyes.
•When removing the instrument from a hazardous
process, avoid contact with the fluid and the interior
of the meter.
•All installation shall comply with local installation
requirements and the local electrical code.
(b) Wiring
•The instrument must be installed by an engineer or
technician who has an expert knowledge of this
instrument. Operators are not permitted to carry out
wiring unless they meet this condition.
•Before connecting the power cables, please confirm
that there is no current flowing through the cables
and that the power supply to the instrument is
switched off.
(c) Operation
•Wait 10 min. after the power is turned off, before
opening the covers.

IM 01C25F01-01E
1-3
1. INTRODUCTION
(d) Maintenance
•Please carry out only the maintenance procedures
described in this manual. If you require further
assistance, please contact the nearest Yokogawa
office.
•Care should be taken to prevent the build up of dust
or other materials on the display glass and the name
plate. To clean these surfaces, use a soft, dry cloth.
(e) Explosion Protected Type Instrument
•Users of explosion proof instruments should refer
first to section 2.9 (Installation of an Explosion
Protected Instrument) of this manual.
•The use of this instrument is restricted to those who
have received appropriate training in the device.
•Take care not to create sparks when accessing the
instrument or peripheral devices in a hazardous
location.
(f) Modification
•Yokogawa will not be liable for malfunctions or
damage resulting from any modification made to this
instrument by the customer.
1.2 Warranty
•The warranty shall cover the period noted on the
quotation presented to the purchaser at the time of
purchase. Problems occurring during the warranty
period shall basically be repaired free of charge.
•If any problems are experienced with this instru-
ment, the customer should contact the Yokogawa
representative from which this instrument was
purchased or the nearest Yokogawa office.
•If a problem arises with this instrument, please
inform us of the nature of the problem and the
circumstances under which it developed, including
the model specification and serial number. Any
diagrams, data and other information you can
include in your communication will also be helpful.
•The party responsible for the cost of fixing the
problem shall be determined by Yokogawa follow-
ing an investigation conducted by Yokogawa.
•The purchaser shall bear the responsibility for repair
costs, even during the warranty period, if the
malfunction is due to:
- Improper and/or inadequate maintenance by the
purchaser.
- Malfunction or damage due to a failure to handle,
use, or store the instrument in accordance with the
design specifications.
- Use of the product in question in a location not
conforming to the standards specified by
Yokogawa, or due to improper maintenance of the
installation location.
- Failure or damage due to modification or repair by
any party except Yokogawa or an approved
representative of Yokogawa.
- Malfunction or damage from improper relocation
of the product in question after delivery.
- Reason of force majeure such as fires, earthquakes,
storms/floods, thunder/lightening, or other natural
disasters, or disturbances, riots, warfare, or
radioactive contamination.

IM 01C25F01-01E
1-4
1. INTRODUCTION
1.3 ATEX Documentation
This is only applicable to the countries in European
Union.
GB
All instruction manuals for ATEX Ex related products
are available in English, German and French. Should
you require Ex related instructions in your local
language, you are to contact your nearest Yokogawa
office or representative.
DK
Alle brugervejledninger for produkter relateret til
ATEX Ex er tilgængelige på engelsk, tysk og fransk.
Skulle De ønske yderligere oplysninger om håndtering
af Ex produkter på eget sprog, kan De rette
henvendelse herom til den nærmeste Yokogawa
afdeling eller forhandler.
I
Tutti i manuali operativi di prodotti ATEX
contrassegnati con Ex sono disponibili in inglese,
tedesco e francese. Se si desidera ricevere i manuali
operativi di prodotti Ex in lingua locale, mettersi in
contatto con l’ufficio Yokogawa più vicino o con un
rappresentante.
E
Todos los manuales de instrucciones para los productos
antiexplosivos de ATEX están disponibles en inglés,
alemán y francés. Si desea solicitar las instrucciones de
estos artículos antiexplosivos en su idioma local,
deberá ponerse en contacto con la oficina o el
representante de Yokogawa más cercano.
NL
Alle handleidingen voor producten die te maken
hebben met ATEX explosiebeveiliging (Ex) zijn
verkrijgbaar in het Engels, Duits en Frans. Neem,
indien u aanwijzingen op het gebied van
explosiebeveiliging nodig hebt in uw eigen taal, contact
op met de dichtstbijzijnde vestiging van Yokogawa of
met een vertegenwoordiger.
SF
Kaikkien ATEX Ex -tyyppisten tuotteiden käyttöhjeet
ovat saatavilla englannin-, saksan- ja ranskankielisinä.
Mikäli tarvitsette Ex -tyyppisten tuotteiden ohjeita
omalla paikallisella kielellännne, ottakaa yhteyttä
lähimpään Yokogawa-toimistoon tai -edustajaan.
P
Todos os manuais de instruções referentes aos produtos
Ex da ATEX estão disponíveis em Inglês, Alemão e
Francês. Se necessitar de instruções na sua língua
relacionadas com produtos Ex, deverá entrar em
contacto com a delegação mais próxima ou com um
representante da Yokogawa.
F
Tous les manuels d’instruction des produits ATEX Ex
sont disponibles en langue anglaise, allemande et
française. Si vous nécessitez des instructions relatives
aux produits Ex dans votre langue, veuillez bien
contacter votre représentant Yokogawa le plus proche.
D
Alle Betriebsanleitungen für ATEX Ex bezogene
Produkte stehen in den Sprachen Englisch, Deutsch
und Französisch zur Verfügung. Sollten Sie die
Betriebsanleitungen für Ex-Produkte in Ihrer
Landessprache benötigen, setzen Sie sich bitte mit
Ihrem örtlichen Yokogawa-Vertreter in Verbindung.
S
Alla instruktionsböcker för ATEX Ex (explosionssäkra)
produkter är tillgängliga på engelska, tyska och
franska. Om Ni behöver instruktioner för dessa
explosionssäkra produkter på annat språk, skall Ni
kontakta närmaste Yokogawakontor eller representant.
GR
       ATEX Ex
  ,   .
       Ex 
     
   Yokogawa   .

IM 01C25F01-01E
2-1
2. HANDLING CAUTIONS
2. HANDLING CAUTIONS
This chapter provides important information on how to
handle the transmitter. Read this carefully before using
the transmitter.
EJX Series transmitters are thoroughly tested at the
factory before shipment. When taking delivery of an
instrument, visually check them to make sure that no
damage occurred during shipment.
Also check that all transmitter mounting hardware
shown in figure 2.1 is included. If the transmitter is
ordered without the mounting bracket, the transmitter
mounting hardware will not be included. After check-
ing the transmitter, carefully repack it in its box and
keep it there until you are ready to install it.
U-bolt nut (L)
Mounting bracket
U-bolt (L)
U-bolt (S)
U-bolt nut (S)
F0201.EPS
Figure 2.1 Transmitter Mounting Hardware
2.1 Model and Specifications
Check
The model name and specifications are written on the
name plate attached to the case.
F0202.EPS
Figure 2.2 Name Plate
2.2 Unpacking
Keep the transmitter in its original packaging to
prevent it from being damaged during shipment. Do
not unpack the transmitter until it reaches the installa-
tion site.
2.3 Storage
The following precautions must be observed when
storing the instrument, especially for a long period.
(a) Select a storage area which meets the following
conditions:
•It is not exposed to rain or subject to water
seepage/leaks.
•Vibration and shock are kept to a minimum.
•It has an ambient temperature and relative
humidity within the following ranges.
Ambient temperature:
–40 to 85°C without integral indicator
–30 to 80°C with integral indicator
Relative humidity:
0% to 100% R.H.
Preferred temperature and humidity:
approx. 25°C and 65% R.H.
(b) When storing the transmitter, repack it carefully in
the packaging that it was originally shipped with.
(c) If the transmitter has been used, thoroughly clean
the chambers inside the cover flanges, so that there
is no process fluid remaining inside. Before placing
it in storage, also make sure that the pressure-
detector is securely connected to the transmitter
section.

IM 01C25F01-01E
2-2
2. HANDLING CAUTIONS
2.4 Selecting the Installation
Location
The transmitter is designed to withstand severe
environmental conditions. However, to ensure that it
will provide years of stable and accurate performance,
take the following precautions when selecting the
installation location.
(a) Ambient Temperature
Avoid locations subject to wide temperature
variations or a significant temperature gradient. If
the location is exposed to radiant heat from plant
equipment, provide adequate thermal insulation
and/or ventilation.
(b) Ambient Atmosphere
Do not install the transmitter in a corrosive atmo-
sphere. If this cannot be avoided, there must be
adequate ventilation as well as measures to prevent
the leaking of rain water and the presence of
standing water in the conduits.
(c) Shock and Vibration
Although the transmitter is designed to be relatively
resistant to shock and vibration, an installation site
should be selected where this is kept to a minimum.
(d) Installation of Explosion-protected Transmitters
An explosion-protected transmitters is certified for
installation in a hazardous area containing specific
gas types. See subsection 2.9 “Installation of an
Explosion-Protected Transmitters.”
2.5 Pressure Connection
WARNING
•Never loosen the process connection when an
instrument is installed in a process. The device
is under pressure, and a loss of seal can result
in a sudden and uncontrolled release of pro-
cess fluid.
•When draining toxic process fluids that have
condensed inside the pressure detector, take
appropriate steps to prevent the contact of such
fluids with the skin or eyes and the inhalation of
vapors from these fluids.
The following precautions must be observed in order to
safely operate the transmitter under pressure.
(a) Make sure that the process connection is tightened
firmly.
(b) Make sure that there are no leaks in the impulse
piping.
(c) Never apply a pressure higher than the specified
maximum working pressure.
2.6 Waterproofing of Cable
Conduit Connections
Apply a non-hardening sealant to the threads to
waterproof the transmitter cable conduit connections.
(See figure 6.8, 6.9 and 6.10.)
2.7 Restrictions on Use of Radio
Transceivers
IMPORTANT
Although the transmitter has been designed to
resist high frequency electrical noise, if a radio
transceiver is used near the transmitter or its
external wiring, the transmitter may be affected
by high frequency noise pickup. To test this,
start out from a distance of several meters and
slowly approach the transmitter with the trans-
ceiver while observing the measurement loop for
noise effects. Thereafter use the transceiver
outside the range where the noise effects were
first observed.
2.8 Insulation Resistance and
Dielectric Strength Test
Since the transmitter has undergone insulation resis-
tance and dielectric strength tests at the factory before
shipment, normally these tests are not required. If the
need arises to conduct these tests, heed the following:
(a) Do not perform such tests more frequently than is
absolutely necessary. Even test voltages that do not
cause visible damage to the insulation may degrade
the insulation and reduce safety margins.
(b) Never apply a voltage exceeding 500 V DC (100 V
DC with an internal lightning protector) for the
insulation resistance test, nor a voltage exceeding
500 V AC (100 V AC with an internal lightning
protector) for the dielectric strength test.
(c) Before conducting these tests, disconnect all signal
lines from the transmitter terminals. The procedure
for conducting these tests is as follows:
• Insulation Resistance Test
1) Short-circuit the + and – SUPPLY terminals in the
terminal box.
2) Turn OFF the insulation tester. Then connect the
insulation tester plus (+) lead wire to the shorted
SUPPLY terminals and the minus (–) leadwire to
the grounding terminal.

IM 01C25F01-01E
2-3
2. HANDLING CAUTIONS
3) Turn ON the insulation tester power and measure
the insulation resistance. The voltage should be
applied as briefly as possible to verify that the
insulation resistance is at least 20 MΩ.
4) After completing the test and being very careful not
to touch exposed conductors disconnect the
insulation tester and connect a 100 kΩresistor
between the grounding terminal and the short-
circuiting SUPPLY terminals. Leave this resistor
connected at least one second to discharge any
static potential. Do not touch the terminals while it
is discharging.
• Dielectric Strength Test
1) Short-circuit the + and – SUPPLY terminals in the
terminal box.
2) Turn OFF the dielectric strength tester. Then
connect the tester between the shorted SUPPLY
terminals and the grounding terminal. Be sure to
connect the grounding lead of the dielectric strength
tester to the ground terminal.
3) Set the current limit on the dielectric strength tester
to 10 mA, then turn ON the power and gradually
increase the test voltage from ‘0’ to the specified
voltage.
4) When the specified voltage is reached, hold it for
one minute.
5) After completing this test, slowly decrease the
voltage to avoid any voltage surges.
2.9 Installation of an Explosion-
Protected Instrument
If a customer makes a repair or modification to an
intrinsically safe or explosionproof instrument and the
instrument is not restored to its original condition, its
intrinsically safe or explosionproof construction may
be compromised and the instrument may be hazardous
to operate. Please contact Yokogawa before making
any repair or modification to an instrument.
NOTE
For FOUNDATION Fieldbus explosion protected
type, please refer to IM 01C25T02-01E
CAUTION
This instrument has been tested and certified as
being intrinsically safe or explosionproof. Please
note that severe restrictions apply to this
instrument’s construction, installation, external
wiring, maintenance and repair. A failure to
abide by these restrictions could make the
instrument a hazard to operate.
WARNING
Maintaining the safety of explosionproof equip-
ment requires great care during mounting,
wiring, and piping. Safety requirements also
place restrictions on maintenance and repair.
Please read the following sections very carefully.
WARNING
The range setting switch must not be used in a
hazardous area.
2.9.1 FM Approval
a. FM Intrinsically Safe Type
Caution for FM intrinsically safe type. (Following
contents refer “DOC. No. IFM022-A12”)
Note 1. Model EJX Series Differential, gauge and
absolute pressure transmitters with
optional code /FS1 are applicable for use
in hazardous locations.
• Applicable Standard: FM3600, FM3610, FM3611,
FM3810
• Intrinsically Safe for Class I, Division 1, Groups A,
B, C & D. Class II, Division 1, Groups E, F & G
and Class III, Division 1, Class I, Zone 0 in
Hazardous Locations, AEx ia IIC
• Nonincendive for Class I, Division 2, Groups A, B,
C & D. Class II, Division 2, Groups F & G and
Class III, Division 1, Class I, Zone 2, Groups IIC,
in Hazardous Locations.
• Outdoor hazardous locations, NEMA 4X.
• Temperature Class: T4
• Ambient temperature: –60 to 60°C

IM 01C25F01-01E
2-4
2. HANDLING CAUTIONS
Note 2. Entity Parameters
• Intrinsically Safe Apparatus Parameters
[Groups A, B, C, D, E, F and G]
Vmax = 30 V Ci = 6 nF
Imax = 200 mA Li = 0 µH
Pmax = 1 W
* Associated Apparatus Parameters
(FM approved barriers)
Voc ≤30 V Ca > 6 nF
Isc ≤200 mA La > 0 µH
Pmax ≤1W
• Intrinsically Safe Apparatus Parameters
[Groups C, D, E, F and G]
Vmax = 30 V Ci = 6 nF
Imax = 225 mA Li = 0 µH
Pmax = 1 W
* Associated Apparatus Parameters
(FM approved barriers)
Voc ≤30 V Ca > 6 nF
Isc ≤225 mA La > 0 µH
Pmax ≤1 W
• Entity Installation Requirements
Vmax ≥Voc or Uo or Vt, Imax ≥Isc or Io or It,
Pmax (or Po) ≤Pi, Ca or Co ≥Ci + Ccable,
La or Lo ≥Li + Lcable
Note 3. Installation
• Barrier must be installed in an enclosure that meets
the requirements of ANSI/ISA S82.01.
• Control equipment connected to barrier must not use
or generate more than 250 V rms or V dc.
• Installation should be in accordance with ANSI/ISA
RP12.6 “Installation of Intrinsically Safe Systems for
Hazardous (Classified) Locations” and the National
Electric Code (ANSI/NFPA 70).
• The configuration of associated apparatus must be
FMRC Approved.
• Dust-tight conduit seal must be used when installed
in a Class II, III, Group E, F and G environments.
• Associated apparatus manufacturer’s installation
drawing must be followed when installing this
apparatus.
• The maximum power delivered from the barrier
must not exceed 1 W.
• Note a warning label worded “SUBSTITUTION OF
COMPONENTS MAY IMPAIR INTRINSIC
SAFETY,” and “INSTALL IN ACCORDANCE
WITH DOC. No. IFM022-A12”
Note 4. Maintenance and Repair
• The instrument modification or parts replacement by
other than authorized representative of Yokogawa
Electric Corporation is prohibited and will void
Factory Mutual Intrinsically safe and Nonincendive
Approval.
F0203-1.EPS
Class I, II, III, Division 1,
Groups A, B, C, D, E, F, G
Class 1, Zone 0 in
Hazardous (Classified)
Locations AEx ia IIC
EJX Series Pressure
Transmitters Safety Barrier
Supply
Hazardous Location Nonhazardous Location
General
Purpose
Equipment
+
–
+
–
+
–
+
–
[Intrinsically Safe]
F0203-2.EPS
EJX Series Pressure
Transmitters
Supply
Hazardous Location Nonhazardous Location
+
–
+
–
Class I, II, Division 2,
Groups A, B, C, D, F, G
Class III, Division 1.
Class 1, Zone 2, Group IIC,
in Hazardous (Classified)
Locations
Not Use
Safety Barrier
[Nonincendive]
General
Purpose
Equipment
b. FM Explosionproof Type
Caution for FM explosionproof type.
Note 1. Model EJX Series differential, gauge,
and absolute pressure transmitters with
optional code /FF1 are applicable for
use in hazardous locations.
• Applicable Standard: FM3600, FM3615, FM3810,
ANSI/NEMA 250
• Explosionproof for Class I, Division 1, Groups B,
C and D.
• Dust-ignitionproof for Class II/III, Division 1,
Groups E, F and G.
• Enclosure rating: NEMA 4X.
• Temperature Class: T6
• Ambient Temperature: –40 to 60°C
• Supply Voltage: 42 V dc max.
• Output signal: 4 to 20 mA
Note 2. Wiring
• All wiring shall comply with National Electrical
Code ANSI/NFPA70 and Local Electrical Codes.
• When installed in Division 1, “FACTORY
SEALED, CONDUIT SEAL NOT REQUIRED.”

IM 01C25F01-01E
2-5
2. HANDLING CAUTIONS
Note 3. Operation
• Keep the “WARNING” nameplate attached to the
transmitter.
WARNING: OPEN CIRCUIT BEFORE REMOV-
ING COVER. FACTORY SEALED, CONDUIT
SEAL NOT REQUIRED. INSTALL IN ACCOR-
DANCE WITH THE USERS MANUAL IM
01C25.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 4. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void Factory Mutual Explosionproof Approval.
c. FM Intrinsically Safe Type/FM
Explosionproof Type
Model EJX Series pressure transmitters with
optional code /FU1 can be selected the type of
protection (FM Intrinsically Safe or FM
Explosionproof) for use in hazardous locations.
Note 1. For the installation of this transmitter,
once a particular type of protection is
selected, any other type of protection
cannot be used. The installation must be
in accordance with the description about
the type of protection in this instruction
manual.
Note 2. In order to avoid confusion, unnecessary
marking is crossed out on the label other
than the selected type of protection when
the transmitter is installed.
2.9.2 CSA Certification
a. CSA Intrinsically Safe Type
Caution for CSA Intrinsically safe type. (Following
contents refer to “DOC No. ICS013-A13”)
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /CS1 are applicable for use
in hazardous locations
Certificate: 1606623
[For CSA C22.2]
• Applicable Standard: C22.2 No.0, C22.2 No.0.4,
C22.2 No.25, C22.2 No.94, C22.2 No.157, C22.2
No.213, C22.2 No.1010.1
• Intrinsically Safe for Class I, Division 1, Groups A,
B, C & D, Class II, Division 1, Groups E, F & G,
Class III, Division 1
• Nonincendive for Class I, Division 2, Groups A, B,
C & D, Class II, Division 2, Groups E, F & G,
Class III, Division 1
• Enclosure: Type 4X,
• Temp. Code: T4
• Amb. Temp.:–50 to 60°C
• Process Temperature: 120°C max.
[For CSA E60079]
• Applicable Standard: CAN/CSA E60079-0,
CAN/CSA E60079-11, CAN/CSA E60079-15,
IEC 60529:2001-02
• Ex ia IIC T4, Ex nL IIC T4
• Ambient Temperature :–50 to 60°C
• Max. Process Temp.: 120°C
• Enclosure: IP66 and IP67
Note 2. Entity Parameters
• Intrinsically safe ratings are as follows:
Maximum Input Voltage (Vmax/Ui) = 30 V
Maximum Input Current (Imax/Ii) = 200 mA
Maximum Input Power (Pmax/Pi) = 0.9 W
Maximum Internal Capacitance (Ci) = 10 nF
Maximum Internal Inductance (Li) = 0 µH
• Type "n" or Nonincendive ratings are as follows:
Maximum Input Voltage (Vmax/Ui) = 30 V
Maximum Internal Capacitance (Ci) = 10 nF
Maximum Internal Inductance (Li) = 0 µH
• Installation Requirements
Uo ≤Ui, Io ≤Ii, Po ≤Pi,
Co ≥Ci + Ccable, Lo ≥Li + Lcable
Voc ≤Vmax, Isc ≤Imax,
Ca ≥Ci + Ccable, La ≥Li + Lcable
Uo, Io, Po, Co, Lo, Voc, Isc, Ca and La are
parameters of barrier.
Note 3. Installation
• In any safety barreir used output current must be
limited by a resistor 'R' such that Io=Uo/R or
Isc=Voc/R.
• The safety barrier must be CSA certified.
• Input voltage of the safet barrier must be less than
250 Vrms/Vdc.
• Installation should be in accordance with Canadian
Electrical Code Part I and Local Electrical Code.
• Dust-tight conduit seal must be used when
installed in Class II and III environments.
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation and Yokogawa
Corporation of America is prohibited and will void
Canadian Standards Intrinsically safe and
nonincendive Certification.

IM 01C25F01-01E
2-6
2. HANDLING CAUTIONS
F0204-1.EPS
Class I, II, III, Division 1,
Groups A, B, C, D, E, F, G
EJX Series Pressure
Transmitters Safety Barrier
Supply
Hazardous Location Nonhazardous Location
General
Purpose
Equipment
+
–
+
–
+
–
+
–
[Intrinsically Safe]
Group IIC, Zone 0
F0204-2.EPS
EJX Series Pressure
Transmitters
Supply
Hazardous Location Nonhazardous Location
+
–
+
–
Class I, II, Division 2,
Groups A, B, C, D, E, F, G
Class III, Division 1.
Not Use
Safety Barrier
[Nonincendive]
CSA Certified
Equipment
([nL] or
nonincendive)
EJX Series Pressure
Transmitters
Group IIC, Zone 2
b. CSA Explosionproof Type
Caution for CSA explosionproof type.
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /CF1 are applicable for use
in hazardous locations:
Certificate: 1589701
[For CSA C22.2]
• Applicable Standard: C22.2 No.0, C22.2 No.0.4,
C22.2 No.0.5, C22.2 No.25, C22.2 No.30,
C22.2 No.94, C22.2 No.61010.1-01
• Explosion-proof for Class I, Groups B, C and D.
• Dustignition-proof for Class II/III, Groups E, F and
G.
• Enclosure: TYPE 4X
• Temperature Code: T6...T4
[For CSA E60079]
• Applicable Standard: CAN/CSA E60079-0,
CAN/CSA E60079-1
• Flameproof for Zone 1, Ex d IIC T6...T4
• Enclosure: IP66 and IP67
• Maximum Process Temperature: 120°C (T4),
100°C (T5), 85°C (T6)
• Ambient Temperature: –50 to 75°C (T4), –50 to
80°C (T5), –50 to 70°C (T6)
• Supply Voltage: 42 V dc max.
• Output Signal: 4 to 20 mA dc
Note 2. Wiring
[For CSA C22.2]
• All wiring shall comply with Canadian Electrical
Code Part I and Local Electrical Codes.
• In hazardous location, wiring shall be in conduit as
shown in the figure.
• WARNING:
A SEAL SHALL BE INSTALLED WITHIN 50cm
OF THE ENCLOSURE.
UN SCELLEMENT DOIT ÊTRE INSTALLÉ À
MOINS DE 50cm DU BOÎTIER.
• WARNING:
WHEN INSTALLED IN CL.I, DIV 2, SEAL NOT
REQUIRED.
UNE FOIS INSTALLÉ DANS CL I, DIV 2,
AUCUN JOINT N'EST REQUIS.
Non-hazardous
Location
Equipment
42 V DC Max.
4 to 20 mA DC
Signal
Non-Hazardous
Locations Hazardous Locations Division 1
Non-Hazardous
Locations Hazardous Locations Division 2
50 cm Max.
Sealing Fitting Conduit
Non-hazardous
Location
Equipment
42 V DC Max.
4 to 20 mA DC
Signal Sealing Fitting
F0205.EPS
SUPPLY
PULSE
CHECK
ALARM
EJX Series
SUPPLY
PULSE
CHECK
ALARM
EJX Series
[For CSA E60079]
• All wiring shall comply with local installation
requirements and local electrical code.
• In hazardous locations, the cable entry devices shall
be of a certified flameproof type, suitable for the
conditions of use and correctly installed.
• Unused apertures shall be closed with suitable
flameproof certified blanking elements. (The plug
attached is flameproof certified.)
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 5 MINUTES
BEFORE OPENING.
APRÉS POWER-OFF, ATTENDRE 5 MINUTES
AVANT D'OUVRIR.

IM 01C25F01-01E
2-7
2. HANDLING CAUTIONS
• WARNING:
WHEN AMBIENT TEMPERATURE ≥65°C,
USE THE HEAT-RESISTING CABLES ≥90°C.
QUAND LA TEMPÉRATURE AMBIANTE ≥
65°C, UTILISEZ DES CÂBLES RÉSISTANTES Á
LA CHALEUR ≥90°C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 4. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation and Yokogawa
Corporation of America is prohibited and will void
Canadian Standards Explosionproof Certification.
c. CSA Intrinsically Safe Type/CSA
Explosionproof Type
Model EJX Series pressure transmitters with
optional code /CU1 can be selected the type of
protection (CSA Intrinsically Safe or CSA
Explosionproof) for use in hazardous locations.
Note 1. For the installation of this transmitter,
once a particular type of protection is
selected, any other type of protection
cannot be used. The installation must be
in accordance with the description about
the type of protection in this instruction
manual.
Note 2. In order to avoid confusion, unnecessary
marking is crossed out on the label other
than the selected type of protection when
the transmitter is installed.
2.9.3 CENELEC ATEX (KEMA)
Certification
(1) Technical Data
a. CENELEC ATEX (KEMA) Intrinsically Safe
Type
Caution for CENELEC ATEX (KEMA) Intrinsi-
cally safe type.
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /KS2 for potentially explo-
sive atmospheres:
• No. KEMA 03ATEX1544 X
• Applicable Standard: EN 50014, EN 50020,
EN 50284, EN 50281-1-1
• Type of Protection and Marking code:
EEx ia IIC T4
• Group: II
• Category: 1G, 1D
• Ambient Temperature for gas-proof: –50 to 60°C
• Process Temperature (Tp.): 120°C max.
• Maximum Surface Temperature for dust-proof:
T85°C (Tamb.: –40 to 60°C, Tp.: 80°C)
T100°C (Tamb.: –40 to 60°C, Tp.: 100°C)
T120°C (Tamb.: –40 to 60°C, Tp.: 120°C)
• Enclosure: IP66 and IP67
Note 2. Electrical Data
• In type of explosion protection intrinsic safety EEx
ia IIC only for connection to a certified intrinsically
safe circuit with following maximum values:
Ui = 30 V
Ii = 200 mA
Pi = 0.9 W
Effective internal capacitance; Ci = 10 nF
Effective internal inductance; Li = 0 mH
Note 3. Installation
• All wiring shall comply with local installation
requirements. (Refer to the installation diagram)
Note 4. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void KEMA Intrinsically safe Certification.
Note 5. Special Conditions for Safe Use
• In the case where the enclosure of the Pressure
Transmitter is made of aluminium, if it is mounted
in an area where the use of category 1 G apparatus
is required, it must be installed such, that, even in
the event of rare incidents, ignition sources due to
impact and friction sparks are excluded.
Transmitter
Supply Safety Barrier *1
Nonhazardous Location
[Installation Diagram]
Hazardous Location
+
–
+
–
F0208.EPS
*1: In any safety barriers used the output current must be limited
by a resistor “R” such that Imaxout-Uz/R.
b. CENELEC ATEX (KEMA) Flameproof Type
Caution for CENELEC ATEX (KEMA) flameproof
type.
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /KF2 for potentially explo-
sive atmospheres:

IM 01C25F01-01E
2-8
2. HANDLING CAUTIONS
• No. KEMA 03ATEX2570
• Applicable Standard: EN 50014, EN 50018, EN
50281-1-1
• Type of Protection and Marking Code: EEx d IIC
T6...T4
• Group: II
• Category: 2G, 1D
• Temperature Class: T6, T5, and T4
• Enclosure: IP66 and IP67
• Ambient Temperature for gas-proof:
–50 to 70°C (T6), –50 to 80°C (T5), and
–50 to 75°C (T4)
• Maximum Process Temperature (Tp.) for gas-proof:
85°C (T6), 100°C (T5), and 120°C (T4)
• Maximum Surface Temperature for dust-proof:
T80°C (Tamb.: –40 to 40°C, Tp.: 80°C)
T100°C (Tamb.: –40 to 60°C, Tp.: 100°C)
T120°C (Tamb.: –40 to 80°C, Tp.: 120°C)
Note 2. Electrical Data
• Supply voltage: 42 V dc max.
• Output signal: 4 to 20 mA
Note 3. Installation
• All wiring shall comply with local installation
requirements.
• The cable entry devices shall be of a certified
flameproof type, suitable for the conditions of use.
Note 4. Operation
• Keep the “WARNING” label attached to the
transmitter.
WARNING: AFTER DE-ENERGIZING,
DELAY 5 MINUTES BEFORE OPENING.
WHEN THE AMBIENT TEMP.65°C,
USE HEAT-RESISTING CABLES90°C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 5. Maintenance and Repair
• The instrument modification or part replacement by
other than an authorized representative of
Yokogawa Electric Corporation is prohibited and
will void KEMA Flameproof Certification.
c. CENELEC ATEX (KEMA) Intrinsically Safe
Type/CENELEC ATEX (KEMA) Flameproof
Type/CENELEC ATEX Type n
Model EJX Series differential, gauge and
absolute pressure transmitters with optional
code /KU2 can be selected the type of protec-
tion CENELEC ATEX (KEMA) Intrinsically Safe,
Flameproof or CENELEC ATEX Type n for use
in hazardous locations.
Note 1. For the installation of this transmitter,
once a particular type of protection is selected,
any other type of protection cannot be used.
The installation must be in accordance with the
description about the type of protection in this
user’s manual.
Note 2. In order to avoid confusion, unnecessary
marking is crossed out on the label other than
the selected type of protection when the
transmitter is installed.
CENELEC ATEX Type of Protection “n”
• Applicable Standard: EN 60079-15:2003
• Referential Standard: IEC60079-0:1998,
IEC60079-11:1999.
• Type of Protection and Marking Code:
EEx nL IIC T4
• Temperature Class: T4
• Enclosure: IP66 and IP67
• Process Temperature: 120°C max.
• Ambient Temperature: –50 to 60°C
Note 1. Electrical Data
Ui = 30 V
Effective internal capacitance; Ci = 10 nF
Effective internal inductance; Li = 0 mH
Note 2. Installation
• All wiring shall comply with local installation
requirements. (refer to the installation diagram)
Note 3. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void Type of Protection “n”.
[EEx nL]
Power Supply
(Zone 2 only)
Transmitter
Supply
Nonhazardous Location
[Installation Diagram]
Hazardous Location
+
–
+
–
F0209.EPS
Ratings of the Power Supply as follows;
Maximum Voltage: 30 V
CENELEC ATEX Type of Protection “Dust”
• Type of Protection and Marking Code: II 1D
• Maximum Surface Temperature:
T80°C (Tamb.: –40 to 40°C, Tp.: 80°C)
T100°C (Tamb.: –40 to 60°C, Tp.: 100°C)
T120°C (Tamb.: –40 to 80°C, Tp.: 120°C)
WARNING
To satisfy IP66 or IP67, apply waterproof glands
to the electrical connection port.

IM 01C25F01-01E
2-9
2. HANDLING CAUTIONS
(2) Electrical Connection
A mark indicating the electrical connection type is
stamped near the electrical connection port. These
marks are as followed:
F0210.EPS
Location of the marking
(3) Installation
WARNING
•All wiring shall comply with local installation
requirements and the local electrical code.
(4) Operation
WARNING
•OPEN CIRCUIT BEFORE REMOVING
COVER. INSTALL IN ACCORDANCE WITH
THIS USER’S MANUAL
•Take care not to generate mechanical sparking
when access to the instrument and peripheral
devices in a hazardous location.
(5) Maintenance and Repair
WARNING
The instrument modification or part replacement
by other than an authorized Representative of
Yokogawa Electric Corporation is prohibited and
will void the certification.
(6) Name Plate
 Name plate
 Tag plate for flameproof type
 Tag plate for intrinsically safe type
 Tag plate for type n protection
F0211.EPS
D
D
AFTER DE-ENERGIZING, DELAY 5 MINUTES
BEFORE OPENING.
WHEN THE AMBIENT TEMP. 65°C,
USE THE HEAT-RESISTING CABLES 90°C
No. KEMA 03ATEX2570
EEx d IIC T6...T4 IP66 andIP67
TEMP. CLASS T6 T5 T4
MAX PROCESS TEMP.(Tp.) 85 100 120 °C
Tamb. -50 to 70 80 75 °C
T80°C(Tamb.:40°C, Tp.:80°C),T100°C(Tamb.:60°C, Tp.:100°C),
T120°C(Tamb.:80°C, Tp.:120°C) Min.Tamb.:-40°C(for DUST)
No.KEMA 03ATEX1544 X
EEx ia IIC T4
IP66 and IP67
Tamb. -50 to 60°C MIN. Tamb.:-40°C(for DUST)
MAX. PROCESS TEMP.(Tp.) 120°C
T85°C(Tp.:80°C), T100°C(Tp.:100°C), T120°C(Tp.:120°C)
Ui=30V, Ii=200mA , Pi=0.9W, Ci=10nF, Li=0
WARNING
EEx nLIIC T4
IP66 and IP67
Tamb. -50 to 60°C
MAX. PROCESS TEMP.(Tp.) 120°C
Ui=30V, Ci=10nF, Li=0
MODEL: Specified model code.
STYLE: Style code.
SUFFIX: Specified suffix code.
SUPPLY: Supply voltage.
OUTPUT: Output signal.
MWP: Maximum working pressure.
CAL RNG: Specified calibration range.
NO.: Serial number and year of production*1.
TOKYO 180-8750 JAPAN:
The manufacturer name and the ad-
dress*2.
*1: The first ditital in the final three numbers of the
serial number appearing after “NO.” on the nameplate
indicates the year of production. The following is an
example of a serial number for a product that was
produced in 2004:
The year 2004
12A819857 432
*2: “180-8750” is the postal code which represents the
following address.
2-9-32 Nakacho, Musashino-shi, Tokyo Japan

IM 01C25F01-01E
2-10
2. HANDLING CAUTIONS
2.9.4 IECEx Certification
Model EJX Series pressure transmitters with
optional code /SU2 can be selected the type of
protection (IECEx Intrinsically Safe/type n or
flameproof) for use in hazardous locations.
Note 1. For the installation of this transmitter,
once a particular type of protection is
selected, any other type of protection
cannot be used. The installation must be
in accordance with the description about
the type of protection in this instruction
manual.
Note 2. In order to avoid confusion, unnecessary
marking is crossed out on the label other
than the selected type of protection when
the transmitter is installed.
a. IECEx Intrinsically Safe Type / type n
Caution for IECEx Intrinsically safe and type n.
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /SU2 are applicable for use
in hazardous locations
• No. IECEx CSA 05.0005
• Applicable Standard: IEC 60079-0:2000,
IEC 60079-11:1999, IEC 60079-15:2001
• Ex ia IIC T4, Ex nL IIC T4
• Ambient Temperature :–50 to 60°C
• Max. Process Temp.: 120°C
• Enclosure: IP66 and IP67
Note 2. Entity Parameters
• Intrinsically safe ratings are as follows:
Maximum Input Voltage (Vmax/Ui) = 30 V
Maximum Input Current (Imax/Ii) = 200 mA
Maximum Input Power (Pmax/Pi) = 0.9 W
Maximum Internal Capacitance (Ci) = 10 nF
Maximum Internal Inductance (Li) = 0 µH
• Type "n" ratings are as follows:
Maximum Input Voltage (Vmax/Ui) = 30 V
Maximum Internal Capacitance (Ci) = 10 nF
Maximum Internal Inductance (Li) = 0 µH
• Installation Requirements
Uo ≤Ui, Io ≤Ii, Po ≤Pi,
Co ≥Ci + Ccable, Lo ≥Li + Lcable
Voc ≤Vmax, Isc ≤Imax,
Ca ≥Ci + Ccable, La ≥Li + Lcable
Uo, Io, Po, Co, Lo, Voc, Isc, Ca and La are
parameters of barrier.
Note 3. Installation
• In any safety barreir used output current must be
limited by a resistor 'R' such that Io=Uo/R.
• The safety barrier must be IECEx certified.
• Input voltage of the safety barrier must be less
than 250 Vrms/Vdc.
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation and will void
IECEx Intrinsically safe and type n certification.
F0213-1.EPS
EJX Series Pressure
Transmitters IECEx certified
Safety Barrier
Supply
Hazardous Location Nonhazardous Location
General
Purpose
Equipment
+
–
+
–
+
–
+
–
[Intrinsically Safe]
Group IIC, Zone 0
F0213-2.EPS
EJX Series Pressure
Transmitters
Supply
Hazardous Location Nonhazardous Location
+
–
+
– Not Use
Safety Barrier
[type n]
IECEx Certified
Equipment [nL]
EJX Series Pressure
Transmitters
Group IIC, Zone 2
b. IECEx Flameproof Type
Caution for IECEx flameproof type.
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /SF2 and /SU2 are appli-
cable for use in hazardous locations:
• No. IECEx CSA 05.0002
• Applicable Standard: IEC60079-0:2000,
IEC60079-1:2001
• Flameproof for Zone 1, Ex d IIC T6...T4
• Enclosure: IP66 and IP67
• Maximum Process Temperature: 120°C (T4),
100°C (T5), 85°C (T6)
• Ambient Temperature: –50 to 75°C (T4), –50 to
80°C (T5), –50 to 70°C (T6)
• Supply Voltage: 42 V dc max.
• Output Signal: 4 to 20 mA dc
Note 2. Wiring
• In hazardous locations, the cable entry devices shall
be of a certified flameproof type, suitable for the
conditions of use and correctly installed.

IM 01C25F01-01E
2-11
2. HANDLING CAUTIONS
• Unused apertures shall be closed with suitable
flameproof certified blanking elements.
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 5 MINUTES
BEFORE OPENING.
• WARNING:
WHEN AMBIENT TEMPERATURE ≥65°C,
USE THE HEAT-RESISTING CABLES ≥90°C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 4. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void IECEx Certification.
2.10 EMC Conformity Standards
EN61326, AS/NZS CISPR11
CAUTION
To meet EMC regulations, Yokogawa recom-
mends that customers run signal wiring through
metal conduits or use shielded twisted-pair
cabling when installing EJX series transmitters in
a plant.
2.11 Pressure Equipment
Directive (PED)
(1) General
• EJX series pressure transmitters are categorized as
pressure accessories under the vessel section of
directive 97/23/EC, which corresponds to Article 3,
Paragraph 3 of PED, denoted as Sound Engineering
Practice (SEP).
• EJX110A-M, EJX110A-H, EJX130A,
EJX440A, EJX510A-D, and EJX530A-D can
be used above 200 bar and therefore considered as
a part of a pressure retaining vessel where category
III, Module H applies. These models with option
code /PE3 conform to that category.
(2) Technical Data
• Models without /PE3
Article 3, Paragraph 3 of PED, denoted as Sound
Engineering Practice (SEP).
• Models with /PE3
Module : H
Type of Equipment :Pressure Accessory - Vessel
Type of fluid : Liquid and Gas
Group of fluid : 1 and 2
Model
EJX110A
EJX110A
with code /PE3
EJX130A
EJX130A
with code /PE3
EJX310A
EJX430A
EJX440A
EJX440A
with code /PE3
EJX510A
EJX510A
with code /PE3
EJX530A
EJX510A
with code /PE3
Category
*2
Article 3, Paragraph 3
(SEP)
III
Article 3, Paragraph 3
(SEP)
III
Article 3, Paragraph 3
(SEP)
Article 3, Paragraph 3
(SEP)
Article 3, Paragraph 3
(SEP)
III
Article 3, Paragraph 3
(SEP)
III
Article 3, Paragraph 3
(SEP)
III
PS.V
(bar.L)
1.6
2.5
2.5
5.0
5.0
1.6
1.6
5.0
5.0
10
70
70
10
70
70
V(L)
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
PS
(bar)
*1
160
250
250
500
500
160
160
500
500
100
700
700
100
700
700
*1: PS is maximum allowable pressure for vessel itself.
*2: Referred to Table 1 covered by ANNEX II of EC Directive
on Pressure Equipment Directive 97/23/EC T0202.EPS
Capsule
code
L
M, H
M, H
M, H
M, H
M, A, B
H, A, B
C, D
C, D
A, B, C
D
D
A, B, C
D
D
(3) Operation
CAUTION
•The temperature and pressure of fluid should
be maintained at levels that are consistent with
normal operating conditions.
•The ambient temperature should be maintained
at a level that is consistent with normal
operating conditions.
•Please take care to prevent water hammer and
the like from inducing excessive pressures in
pipes and valves. If phenomena are likely,
install a safety valve or take some other
appropriate measure to prevent pressure from
exceeding PS.
•Take appq“Ärg˙Le measures at the device or
system level to protect transmitters if they are
to be operated near an external heat source.

IM 01C25F01-01E
2-12
2. HANDLING CAUTIONS
2.12 Low Voltage Directive
Applicable standard : EN61010-1
(1) Pollution Degree 2
"Pollution degree" describes the degree to which a
soild, liquid, or gas which deteriorates dielectric
strength or surface resistivity is adhering. " 2 "
applies to normal indoor atmosphere. Normally,
only non-conductive pollution occurs. Occasionally,
however, temporary conductivity caused by
condenstaion must be expected.
(2) Installation Category I
"Overvoltage category(Installation category)"
describes a number which defines a transient
overvoltage condition. It implies the regulattion for
impulse withstand voltage. " I " applies to electrical
equipment which is supplied from the circuit when
appropriate transient overvoltage control means
(interfaces) are provided.

IM 01C25F01-01E
3-1
3. COMPONENT NAMES
3. COMPONENT NAMES
HIGH LOW
Slide switch
Burnout direction switch
Write protection switch
Burnout Direction
Switch Position
BO H L
WR E D
HL
ED
HL
ED
Burnout direction switch (BO)
Burnout Direction
F0301.EPS
Write Protection
Switch Position H L
ED
H L
ED
Write Protection
Hardware write protection switch (WR)
YES
(Write disabled)
NO
(Write enabled)
External indicator
conduit connection (Note 1)
Transmitter section
Integral
indicator (Note 1)
Mounting screw
Range-setting
switch (Note 1)
(See section 7.5)
Amplifier Cover
CPU assembly
Zero-
adjustment
screw
Conduit
connection
(Note 2)
Note 1: See subsection 9.2, “Model and Suffix Codes,” for details.
Note 2: Applicable for BRAIN/HART communication type. Set the switches as shown in the figure above to set the burn-out direction
and write protection. The Burnout switch is set to the H side for delivery (unless option code /C1 or /C2 is specified in the
order), and the hardware write protection switch is set to E side.The setting of the switches can be confirmed via communica-
tion. An external zero adjustment screw can only be disabled by communication. To disable the screw, set a parameter before
activating the hardware write protect function. See each communicaion manual.
Figure 3.1 Component Names
Table 3.1 Display Symbol
Display Symbol Meaning of Display Symbol
The output signal being zero-adjusted is increasing.
The output signal being zero-adjusted is decreasing.
T0301.EPS
Write protect function is enabled.