YOKOGAWA DPharp EJXC40A User manual

User’s
Manual
Digital Remote Sensor
IM 01C25W05-01EN
IM 01C25W05-01EN
4th Edition

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IM 01C25W05-01EN
Digital Remote Sensor
IM 01C25W05-01EN 4th Edition
4th Edition: Nov. 2019 (YK)
All Rights Reserved, Copyright © 2016, Yokogawa Electric Corporation
Contents
1. Introduction............................................................................................... 1-1
Regarding This Manual................................................................................................ 1-2
Trademarks ................................................................................................................... 1-3
1.1 Safe Use of This Product ................................................................................. 1-3
1.2 Warranty............................................................................................................. 1-4
2. Handling Cautions.................................................................................... 2-1
2.1 ModelandSpecicationsCheck..................................................................... 2-1
2.2 Unpacking.......................................................................................................... 2-1
2.3 Storage............................................................................................................... 2-2
2.4 Selecting the Installation Location ................................................................. 2-2
2.5 Pressure Connection........................................................................................ 2-2
2.6 WaterproongofCableConduitConnectionsandDRSCable ................... 2-3
2.7 Restrictions on Use of Radio Transceivers ................................................... 2-3
2.8 Insulation Resistance and Dielectric Strength Test...................................... 2-3
2.9 Installation of an Explosion-Protected Instrument ....................................... 2-4
2.9.1 FM Approval ...................................................................................... 2-4
2.9.2 ATEXCertication............................................................................. 2-9
2.9.3 IECExCertication.......................................................................... 2-12
2.9.4 Name Plate ......................................................................................2-15
3. Component Description .......................................................................... 3-1
3.1 High Pressure Side Transmitter (Master)....................................................... 3-1
3.2 Low Pressure Side Transmitter (Slave) .......................................................... 3-2
4. Installation................................................................................................. 4-1
4.1 Precautions........................................................................................................ 4-1
4.2 Mounting ............................................................................................................ 4-1
4.3 ConnectingtheDRSCable ............................................................................. 4-4
4.4 Mounting the C10FR Flushing Connection Ring .......................................... 4-4
4.4.1 Mounting to Pressure Detector Section............................................. 4-4
4.4.2 Mounting to Process Flange .............................................................. 4-5
4.5 A󰀩xingtheTeonFilm .................................................................................... 4-6
4.6 Tank Spud Mounting Method........................................................................... 4-6
4.7 Rotating Transmitter Section........................................................................... 4-8
4.8 Changing the Direction of Integral Indicator ................................................. 4-8

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IM 01C25W05-01EN
5. Wiring......................................................................................................... 5-1
5.1 Wiring Precautions ........................................................................................... 5-1
5.2 Selecting the Wiring Materials......................................................................... 5-1
5.3 Connections of External Wiring to Terminal Box .......................................... 5-1
5.3.1 Power Supply Wiring Connection ...................................................... 5-1
5.3.2 External Indicator Connection............................................................ 5-1
5.3.3 ConnectingtheHARTCongurationTool......................................... 5-2
5.3.4 Check Meter Connection ................................................................... 5-2
5.4 Wiring ................................................................................................................. 5-2
5.4.1 LoopConguration ............................................................................ 5-2
5.4.2 Wiring Installation............................................................................... 5-2
5.5 DRSCableConnection.................................................................................... 5-3
5.5.1 Wiring through a Cable Gland ........................................................... 5-3
5.5.2 Wiring through a Wiring Metal Conduit ............................................. 5-6
5.5.3 Removing DRS Cable with Cable Gland........................................... 5-6
5.5.4 Removing DRS Cable Running through a Wiring Metal Conduit...... 5-6
5.5.5 Fixing the DRS Cable ........................................................................ 5-7
5.6 Grounding.......................................................................................................... 5-7
5.7 Power Supply Voltage and Load Resistance................................................. 5-7
6. Operation................................................................................................... 6-1
6.1 Preparation for Starting Operation ................................................................. 6-1
6.2 Zero Point Adjustment ..................................................................................... 6-2
6.3 Starting Operation ............................................................................................ 6-3
6.4 Shutting Down Operation ................................................................................ 6-3
6.5 Venting or Draining Transmitter Process-Detector Section ........................ 6-3
6.5.1 Draining Condensate from C10FR Flushing Connection Ring ......... 6-4
6.5.2 Venting Gas from C10FR Flushing Connection Ring ....................... 6-4
6.6 Local Parameter Setting................................................................................... 6-5
6.6.1 Local Parameter Setting (LPS) Overview.......................................... 6-5
6.6.2 Activating Local Parameter Setting ................................................... 6-7
6.6.3 Parameter Setting Review ................................................................. 6-7
6.6.4 TagNumberConguration................................................................. 6-8
6.6.5 Di󰀨erentialPressureUnitConguration ............................................ 6-8
6.6.6 Di󰀨erentialPressureLRV/URVConguration................................... 6-8
6.6.7 DampingTimeConstantConguration ............................................. 6-9
6.6.8 OutputModeConguration ............................................................. 6-10
6.6.9 DisplayOut1Conguration............................................................. 6-10
6.6.10 Re-rangebyapplyingactualpressure(LRV/URV).......................... 6-10
6.6.11 Save or Cancel.................................................................................6-10
6.6.12 AbortConguration.......................................................................... 6-11
6.6.12.1 AbortConguration(Menu) ............................................ 6-11
6.6.12.2 AbortConguration(Parameter) .................................... 6-11

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6.6.13 Local Parameter Setting Lock.......................................................... 6-11
6.6.14 Others .............................................................................................. 6-11
7. HART Communication............................................................................. 7-1
7.1 Connection ........................................................................................................ 7-1
7.1.1 Integral Indicator Display at Power-On.............................................. 7-1
7.1.2 AligningCongurationToolDDandDeviceRevision........................ 7-2
7.1.3 SettingParametersUsingtheDTM................................................... 7-2
7.1.4 ConnectingDPharpandCongurationTool...................................... 7-3
7.2 Setting Parameters ........................................................................................... 7-3
7.2.1 Menu Tree.......................................................................................... 7-3
7.2.1.1 DD and DTM Menu Tree .................................................. 7-3
7.2.2 Basic Setup ........................................................................................ 7-4
7.2.2.1 Tags and Device Information ............................................ 7-4
7.2.2.2 Setting Process Variables................................................. 7-4
7.2.2.3 Unit.................................................................................... 7-5
7.2.2.4 Measuring Range ............................................................. 7-5
7.2.2.5 Output Mode ..................................................................... 7-6
7.2.2.6 Di󰀨erentialPressureDampingTimeConstant................. 7-6
7.2.2.7 Output Signal Low Cut...................................................... 7-7
7.2.3 Detail Setup........................................................................................ 7-8
7.2.3.1 Pressure Signal Setup...................................................... 7-8
7.2.3.2 Pressure Damping Time Constant ................................... 7-8
7.2.3.3 Impulse Line Connection Orientation Setup..................... 7-9
7.2.3.4 Bi-directional Flow Measurement Setup .......................... 7-9
7.2.3.5 Analog Signal Variable Range Setup ............................. 7-10
7.2.3.6 Integral Indicator Display Mode ...................................... 7-10
7.2.3.7 Integral Indicator Setup................................................... 7-10
7.2.3.8 DisplayTemperatureUnitSetup..................................... 7-12
7.2.3.9 Zero Point Adjustment and Span Adjustment................. 7-12
7.2.3.10 Analog Output Adjustment.............................................. 7-15
7.2.3.11 External Switch Mode..................................................... 7-16
7.2.3.12 CPUErrorBurnoutSwitchandHardwareWriteProtection
........................................................................................ 7-16
7.2.3.13 Software Write-Protect.................................................... 7-16
7.2.3.14 Signal Characterizer Setup............................................. 7-17
7.2.3.15 Alarm Setup .................................................................... 7-18
7.2.3.16 Test Output, Simulation, and Squawk ............................ 7-19
7.2.3.17 Burst Mode...................................................................... 7-20
7.2.3.18 Multidrop Mode ............................................................... 7-26
7.3 Diagnostics...................................................................................................... 7-28
7.3.1 Self-Diagnostics............................................................................... 7-28
7.3.1.1 CheckingUsingtheHARTCongurationTool ............... 7-28

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7.3.1.2 Checking with Integral Indicator ..................................... 7-28
7.3.1.3 Status information........................................................... 7-28
7.3.1.4 NE107 Status Information .............................................. 7-29
7.3.2 Advanced Diagnostics .....................................................................7-30
7.3.2.1 What Is the Multi Sensing Process Monitoring Function?
........................................................................................ 7-30
7.3.2.2 Impulse Line Blockage Detection ................................... 7-31
7.3.2.2.1 Blockage Determination...................................................... 7-33
7.3.2.2.2 Combination of the Reference Value and Blockage Detection
Result .................................................................................. 7-34
7.3.2.2.3 Operation Parameters......................................................... 7-36
7.3.2.2.4 Operating Procedure........................................................... 7-38
7.3.2.2.5 Alert and Alarm Setup ......................................................... 7-39
7.3.2.2.6 ConditionConrmation........................................................ 7-41
7.3.2.2.7 Reference Value Acquisition ............................................... 7-42
7.3.2.2.8 Checking the Blockage Detection Operating Capacity....... 7-42
7.3.2.2.9 ILBD Execution.................................................................... 7-43
7.3.2.2.10 Tuning.................................................................................. 7-43
7.3.2.2.11 Resetting the Reference Value ........................................... 7-45
7.3.2.2.12 ILBD Parameter List............................................................ 7-45
7.3.2.3 Heat Trace Monitoring .................................................... 7-48
7.3.2.3.1 Flg temp coef Setting .......................................................... 7-49
7.3.2.3.2 Alarm Generation ................................................................ 7-49
7.3.2.3.3 Heat Trace Monitoring Parameter List ................................ 7-50
8. Maintenance.............................................................................................. 8-1
8.1 Overview ............................................................................................................ 8-1
8.2 CalibrationInstrumentSelection .................................................................... 8-1
8.3 Calibration ......................................................................................................... 8-3
8.4 DisassemblyandReassembly ........................................................................ 8-4
8.4.1 Replacing the Integral Indicator ......................................................... 8-4
8.4.2 ReplacingtheCPUBoardAssembly................................................. 8-5
8.4.3 Cleaning and Replacing the Capsule Assembly ............................... 8-6
8.5 Troubleshooting................................................................................................ 8-7
8.5.1 Basic Troubleshooting ....................................................................... 8-7
8.5.2 Troubleshooting Flowcharts............................................................... 8-7
8.5.3 Alarms and Countermeasures........................................................... 8-9
9. Parameter Summary ................................................................................ 9-1
10. GeneralSpecications .......................................................................... 10-1

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IM 01C25W05-01EN
Appendix 1. Safety Instrumented Systems Installation ............................A1-1
A1.1 Scope and Purpose ....................................................................................... A1-1
A1.2 Using the transmitter for an SIS Application .............................................. A1-1
A1.2.1 Safety Accuracy ...............................................................................A1-1
A1.2.2 Diagnostic Response Time..............................................................A1-1
A1.2.3 Setup................................................................................................A1-1
A1.2.4 Required Parameter Settings ..........................................................A1-1
A1.2.5 Proof Testing ....................................................................................A1-1
A1.2.6 Repair and Replacement.................................................................A1-2
A1.2.7 Startup Time.....................................................................................A1-2
A1.2.8 FirmwareUpdate .............................................................................A1-2
A1.2.9 Reliability Data .................................................................................A1-2
A1.2.10 Lifetime Limits ..................................................................................A1-3
A1.2.11 Environmental Limits .......................................................................A1-3
A1.2.12 Application Limits .............................................................................A1-3
A1.3 DenitionsandAbbreviations...................................................................... A1-3
A1.3.1 Denitions ........................................................................................A1-3
A1.3.2 Abbreviations ...................................................................................A1-3
Appendix 2. ILBD Check List........................................................................A2-1
Revision Information

<1. Introduction> 1-1
IM 01C25W05-01EN
1. Introduction
Thank you for purchasing the DPharp Digital Remote Sensor (DRS).
Your transmitter was precisely calibrated at the factory before shipment.
Toensurebothsafetyande󰀩ciency,pleasereadthismanualcarefullybeforeyouoperatetheinstrument.
ThismanualdescribestheDigitalRemoteSensor.Themodelandsu󰀩xcodesfortheDigitalRemoteSensor
consist a transmitter body section and a diaphragm seal section for the high pressure side transmitter (master)
and low pressure side transmitter (slave). Check the model and the transmitter body section style code written
on the product nameplate.
F0101.ai
DRS cable
High pressure side transmitter
(master)
Low pressure side transmitter
(slave)
Screw mounting:
Digital remote sensor EJXC40A
High pressure side transmitter (master)
Low pressure side transmitter (slave)
With diaphragm seals:
Digital remote sensor EJXC40A
High pressure side transmitter (master)
Low pressure side transmitter (slave)
High pressure side diaphragm seal
Low pressure side diaphragm seal
High pressure side flushing connection ring
Low pressure side flushing connection ring
Product Name Model GS No. IM No.
Transmitter body section Pressure transmitter EJX530A GS01C25F01-01EN IM 01C25F01-01E
EJX630A GS01C25F05-01EN
Model Style code
EJXC40A S1
EJX530A S2
EJX630A S1

<1. Introduction>1-2
IM 01C25W05-01EN
WARNING
Digital Remote Sensor
Combination Model Applicable Transmitter
EJXC40A EJX530A, EJX630A
The models for combination, applicable
transmitter and accessories represent a
diaphragm seal system.
CEandothercerticationareacquiredforthe
applicable transmitter model.
Seesection“ModelandSu󰀩xCodes”ofthis
document.
NOTE
This manual describes the hardware
congurations,installation,operationand
maintenance of the EJXC40A digital remote
sensor.
Fordetailedinformationspecictoagauge
pressure transmitter EJX530A or EJX630A,
as well as these information as “EMC
conformitystandards”,“PressureEquipment
Directive(PED)”and“SafetyRequirement
Standards”,pleaserefertothetransmitter’s
users’manualIM01C25F01-01E.
The manuals in pdf format are available on our
website(http://www.yokogawa.com/).
WARNING
Installing and operating the instruments in a
placethatrequiresexplosion-proofcertications
issubjecttostringentrestrictionsdenedineach
certication.Thosewhoinstalloroperatethe
digital remote sensor in a hazardous locations
must read the relevant precautions described in
this manual and the following manual especially
inthe“HandlingCautions”chapterbefore
handling the instruments and follow them.
IM 01C25A01-01E Installation Manual or
IM 01C25F01-01E Hardware Manual for
EJX530A and EJX630A.
NOTE
When describing the model name like EJ530,
it shows the applicability for EJX530A.
Regarding This Manual
• Thismanualandtheidenticationtagattached
on the packing box are essential parts of the
product. Please keep hem in a safe place for
future reference.
• 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
tness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
o󰀩ce.
• Thespecicationscoveredbythismanualare
limited to those for the standard type under the
speciedmodelnumberbreak-downanddonot
cover custom-made instruments.
• Pleasenotethatchangesinthespecications,
construction, or component parts of the
instrumentmaynotimmediatelybereected
in this manual at the time of change, provided
that postponement of revisions will not cause
di󰀩culty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 responsibility for any such harm owing to
any defects in the product which were not
predictable, or for any indirect damages.

<1. Introduction> 1-3
IM 01C25W05-01EN
• 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
Functional grounding terminal
Caution
This symbol indicates that the operator
mustrefertoanexplanationintheuser’s
manual in order to avoid the risk of injury
or death of personnel or damage to the
instrument.
Trademarks
• ‘DPharp’,‘EJX’and‘FieldMate’areregistered
trademarks of Yokogawa Electric Corporation.
Company names and product names used
in this material are registered trademarks or
trademarks of their respective owners.
• In this manual, trademarks or registered
trademarks are not marked with ™ or ®.
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
impaired. 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
engineer 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
uids.
• When draining condensate from the pressure
detector section, take appropriate precautions
to prevent the inhalation of harmful vapors and
thecontactoftoxicprocessuidswiththeskin
or eyes.
• When removing the instrument from a
hazardousprocess,avoidcontactwiththeuid
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
conrmthatthereisnocurrentowingthrough
the cables and that the power supply to the
instrumentisswitchedo󰀨.
(c) Operation
• Wait10min.afterthepoweristurnedo󰀨,before
opening the covers.

<1. Introduction>1-4
IM 01C25W05-01EN
(d) Maintenance
• Please carry out only the maintenance
procedures described in this manual. If you
require further assistance, please contact the
nearestYokogawao󰀩ce.
• 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rsttothesectionof“Installationofan
ExplosionProtectedInstrument”of
IM 01C25A01-01E or IM 01C25F01-01E.
• 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) Modication
• Yokogawa will not be liable for malfunctions or
damageresultingfromanymodicationmade
to this instrument by the customer.
(g) Product Disposal
• The instrument should be disposed of in
accordancewithlocalandnationallegislation/
regulations.
(h) Authorized Representative in EEA
• In relation to the CE Marking, The
authorised representative for this product
in the EEA (European Economic Area) is:
Yokogawa Europe B.V. Euroweg 2, 3825 HD
Amersfoort,The Netherlands
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
instrument, the customer should contact the
Yokogawa representative from which this
instrument was purchased or the nearest
Yokogawao󰀩ce.
• 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specication
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xingthe
problem shall be determined by Yokogawa
following 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specications.
- Useoftheproductinquestioninalocation
notconformingtothestandardsspeciedby
Yokogawa, or due to improper maintenance
of the installation location.
- Failureordamageduetomodication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res,
earthquakes,storms/oods,thunder/
lightening, or other natural disasters, or
disturbances, riots, warfare, or radioactive
contamination.

<2. Handling Cautions> 2-1
IM 01C25W05-01EN
2. Handling Cautions
The 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gure2.1isincluded.
If the transmitter is ordered without the mounting
bracket or with diaphragm seals, the transmitter
mounting hardware will not be included. This
chapter provides important information on how to
handle the transmitter. Read this carefully before
using the transmitter.
Horizontal pipe mounting
F0201.ai
U-bolt (L)
nut
Mounting bracket
50 mm (2-inch)
pipe
U-bolt (L)
U-bolt (S)
U-bolt (S)
nut
Figure 2.1 Transmitter Mounting Hardware
2.1 ModelandSpecications
Check
Themodelnameandspecicationsarewrittenon
the name plate attached to the case. Look up the
GS(SeeChapter10)formodelandsu󰀩xcodes
andcheckthatspecicationsareasyouordered.
When contacting Yokogawa, please also inform us
of this information.
F0202.ai
PRESSURE HIGH
Tag number
Serial No. & Diaphragm Seal System Code
PRESSURE LOW
Low pressure side transmitter (slave)
High pressure side transmitter (master)
Serial No. & DFS Accessary Model Code
Serial No. & Diaphragm Seal System Code
Serial No. & DFS Accessary Model Code
Read GS 01C25W05-01
Read GS 01C25W05-01
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
installation site.

<2. Handling Cautions>2-2
IM 01C25W05-01EN
2.3 Storage
The following precautions must be observed when
storing the instrument, especially for a long period.
(1) 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. Room
temperature and humidity (around 25°C, 65%)
are preferred.
Temperature:
–40 to 85°C without integral indicator
–30 to 80°C with integral indicator
 oratemperaturerangedenedbyvarious
specications
Humidity: 0 to 100%RH
(2) When storing the transmitter, repack it carefully
in the packaging that it was originally shipped
with.
(3) If the transmitter has been used, thoroughly
clean the diaphragm surface (pressure-detector
section),sothatthereisnoprocessuid
remaining on them.
Before placing it in storage, also make sure that
the pressure-detector is securely connected to
the transmitter section.
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.
 AmbientTemperature
Avoid locations subject to wide temperature
variationsorasignicanttemperaturegradient.If
the location is exposed to direct sunlight or radiant
heat from plant equipment, provide adequate
shade,thermalinsulationand/orventilation.
Also, avoid locations subject to prolonged high
temperature and high humidity.
 AmbientAtmosphere
Do not install the transmitter in a corrosive
atmosphere. 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.
 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.
Installation of Explosion-protected
Transmitters
Anexplosion-protectedtransmittersiscertiedfor
installationinahazardousareacontainingspecic
gas types.
2.5 Pressure Connection
WARNING
• Sincetheaccumulatedprocessuidmaybe
toxic or otherwise harmful, take appropriate
stepstopreventthecontactofsuchuids
with the skin or eyes and the inhalation
ofvaporsfromtheseuidsevenafter
dismounting the instrument from process line
for maintenance. Avoid draining or releasing
gas while the instrument is running as doing
so will disturb the measured pressure.
• On models with diaphragm seals, never
loosentheprocessangebolts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processuid.
The following precautions must be observed
in order to safely operate the transmitter under
pressure.
(1) Make sure that there are no leaks in the impulse
piping or process connections.
(2) Make sure that the transmitter process
connections are securely fastened.
(3) Never apply a pressure higher than the
speciedmaximumworkingpressure.

<2. Handling Cautions> 2-3
IM 01C25W05-01EN
2.6 WaterproongofCable
Conduit Connections and
DRSCable
Apply a non-hardening sealant to the threads
to waterproof the transmitter cable conduit
connections.(Seegures5.6and5.7.)
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a󰀨ected
by high frequency noise pickup. To test this, start
out from a distance of several meters and slowly
approach the transmitter with the transceiver
while observing the measurement loop for noise
e󰀨ects.Thereafterusethetransceiveroutside
therangewherethenoisee󰀨ectswererst
observed.
2.8 Insulation Resistance and
Dielectric Strength Test
(1) 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.
(2) Never apply a voltage exceeding 100 V DC
for the insulation resistance test, nor a voltage
exceeding 100 V AC for the dielectric strength
test.
(3) 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. Perform the insulation resistance test
separately for the high pressure side transmitter
(master) and low pressure side transmitter
(slave).
2. Remove the DRS cable from the high pressure
side transmitter (master) and low pressure side
transmitter (slave).
3.Short-circuitthe+and–SUPPLYterminalsin
the terminal box.
4. 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.
5. Turn ON the insulation tester power and
measure the insulation resistance. The voltage
shouldbeappliedasbrieyaspossibletoverify
thattheinsulationresistanceisatleast20MΩ.
6. After completing the test and being very careful
not to touch exposed conductors disconnect the
insulationtesterandconnecta100kΩresistor
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.
7. Connect the DRS cable to the high pressure
side transmitter (master) and low pressure side
transmitter (slave).
■DielectricStrengthTest
1. Perform the dielectric strength test separately
for the high pressure side transmitter (master)
and low pressure side transmitter (slave).
2. Remove the DRS cable from the high pressure
side transmitter (master) and low pressure side
transmitter (slave).
3.Short-circuitthe+and–SUPPLYterminalsin
the terminal box.
4. 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.
5. Set the current limit on the dielectric strength
tester to 10mA, then turn ON the power and
graduallyincreasethetestvoltagefrom‘0’to
thespeciedvoltage.
6.Whenthespeciedvoltageisreached,holdit
for one minute.
7. After completing this test, slowly decrease the
voltage to avoid any voltage surges.
8. Connect the DRS cable to the high pressure
side transmitter (master) and low pressure side
transmitter (slave).

<2. Handling Cautions>2-4
IM 01C25W05-01EN
Low pressure side transmitter (slave)
Ground terminal
(Inside)
Ground terminal
(Outside)
High pressure side transmitter (master)
Ground terminal
(Inside)
Ground terminal
(Outside)
F0203.ai
Figure 2.3 Ground terminal
2.9 Installation of an Explosion-
Protected Instrument
Ifacustomermakesarepairormodication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
modicationtoaninstrument.
CAUTION
Thisinstrumenthasbeentestedandcertied
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
equipment 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.
IMPORTANT
For combined approval types
Once a device of multiple approval type is
installed, it should not be re-installed using any
other approval types. Apply a permanent mark
in the check box of the selected approval type
onthecerticationlabelonthetransmitterto
distinguish it from unused approval types.
IMPORTANT
AlltheblindplugswhichaccompanytheEJX/
EJA-E transmitters upon shipment from the
factoryarecertiedbytheapplicableagencyin
combination with those transmitters. The plugs
whicharemarkedwiththesymbols“◊Ex”on
theirsurfacesarecertiedonlyincombination
withtheEJX/EJA-Eseriestransmitters.
2.9.1 FM Approval
a. FM Intrinsically Safe Type
Caution for FM intrinsically safe type. (Following
contentsrefer“DOC.No.IIE028-A101”)
Certicationinformation
Warning:
Amodicationoftheequipmentwouldno
longer comply with the construction described
inthecerticatedocumentation.
Note1.EJX/EJA-ESeriesDi󰀨erential,gauge
and absolute pressure transmitters with
optionalcode/FS14areapplicableforuse
in hazardous locations.
• Applicable Standard:
Class 3600:2018, Class 3610:2018,
Class 3611:2018, Class 3810:2018,
ANSI/UL-60079-0:2013,
ANSI/UL-60079-11:2014,
NEMA 250-2014,
ANSI/IEC60529-2004(R2011)
• Intrinsically Safe for
Class I, Division 1, Groups A, B, C, D;
Class II, Division 1, Groups E, F, G;
Class III, Division 1;
Class I, Zone 0, Group IIC, AEx ia

<2. Handling Cautions> 2-5
IM 01C25W05-01EN
• Nonincendive for
Class I, Division 2, Groups A, B, C, D;
Class II, Division 2, Groups F, G;
Class III, Division 1;
Class I, Zone 2, Group IIC
• Enclosure:IP66/IP67andType4X
• Temperature Class: T4
• Ambient temperature: –50 to 60°C
Note 2. Electrical Parameters
• [EJX****-P, EJA****-P]
Supply/OutputCircuit(Terminals:+,–)
Ui:30V Ii: 200 mA Pi: 0.9 W
Ci: 27.6 nF Li: 0 mH
Ii and Pi: not applicable to nonincendive
eldwiring
Communication Circuit (Connector)
Uo:8.2V Io: 160 mA Po: 0.3 W
Co:7.6μF Lo: 1 mH
• [EJX****-S, EJA****-S]
Ui:8.2V Ii: 200 mA Pi: 0.4 W
Ci:6μF Li: 0 mH
Note 3. Installation
• No revision to this drawing without prior
approval of FM.
• Installation must be in accordance with the
NationalElectricCode(NFPA70),ANSI/ISA-
RP12.06.01, and relevant local codes.
• The Associated Apparatus must be an FM-
approved linear power supply.
• Thefollowingconditionsmustbesatisedfor
each circuit.
 Voc(orUo)≤Ui
 Isc(orIo)≤Ii
 Po≤Pi
 Ca(orCo)≥Ci+Ccable
 La(orLo)≥Li+Lcable
• Control equipment connected to the
Associated Apparatus must not use or
generateavoltagemorethanUmofthe
control equipment.
• The control drawing of the Associated
Apparatus must be followed when installing
the equipment.
• In case Nonincendive Field Wiring Concept
is used for the interconnection, FM-approved
Associated Nonincendive Field Wiring
Apparatus, which meets the following
conditions, must be used as the Power
Supply/ControlEquipment.
 Voc(orUo)≤Ui
 Ca(orCo)≥Ci+Ccable
 La(orLo)≥Li+Lcable
• Dust-tight conduit seals must be used when
installed in Class II or Class III environments.
• WARNING – POTENTIAL ELECTROSTATIC
CHARGING HAZARD – WHEN THE
EQUIPMENTISUSEDINHAZARDOUS
LOCATIONS, AVOID ANY ACTIONS WHICH
GENERATE ELECTROSTATIC CHARGES,
SUCHASRUBBINGWITHADRYCLOTH.
• WARNING–SUBSTITUTIONOF
COMPONENTS MAY IMPAIR INTRINSIC
SAFETYANDSUITABILITYFOR
HAZARDOUSLOCATIONS
Note 4. Maintenance and Repair
WARNING
Only personnel authorized by Yokogawa Electric
Corporation can repair the equipment.
Note5. SpecicConditionsofUse
WARNING
• Precautions shall be taken to minimize the
risk from electrostatic discharge of painted
parts.
• When the enclosure of the Pressure
Transmitters is made of aluminum alloy, if
it is mounted in Zone 0, it must be installed
such that, even in the event of rare incidents,
anignitionsourceduetoimpactand/or
friction sparks is excluded.
• Model EJX****-P and EJA****-P series
pressure transmitters are not capable of
withstanding the dielectric strength of
500 V r.m.s. between the intrinsically safe
circuit and the enclosure.

<2. Handling Cautions>2-6
IM 01C25W05-01EN
Note 6. Control Drawing

<2. Handling Cautions> 2-7
IM 01C25W05-01EN

<2. Handling Cautions>2-8
IM 01C25W05-01EN

<2. Handling Cautions> 2-9
IM 01C25W05-01EN
b. FMExplosionproofType
Caution for FM explosionproof type.
Note1.EJX/EJA-ESeriespressuretransmitters
withoptionalcode/FF1areapplicablefor
use in hazardous locations.
• Applicable Standard:
FM3600:2018, FM3615:2018, FM3810:2018,
NEMA250:2003,ANSI/UL61010-1:2012,
ANSI/UL61010-2-30:2012
• 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: Type 4X
• Temperature Class: T6
• Ambient Temperature: –40 to 60°C
• Supply Voltage:
 42Vdcmax.(signalcode“P”)
 7.14Vdcmax,20mW(signalcode“S”)
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.”
F0204.ai
Pressure Transmitters
Master module
Power Supply
Master module and Slave module Connection
SUPPLY
SUPPLY
+
–
Master - Slave
Communication Cable
Pressure Transmitters
Slave module
+
–
+
–
A
B
Master - Slave
Communication
Connector
Note 3. Operation
• Keepthe“WARNING”nameplateattachedto
the transmitter.
WARNING:OPENCIRCUITBEFORE
REMOVING COVER. FACTORY SEALED,
CONDUITSEALNOTREQUIRED.INSTALL
INACCORDANCE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modication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
Optionalcode/FU14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 ATEXCertication
(1) Technical Data
a. ATEX Intrinsically Safe
Caution for ATEX Intrinsically safe type.
Certicationinformation
Warning:
Amodicationoftheequipmentwouldno
longer comply with the construction described
inthecerticatedocumentation.
Note1. EJX/EJA-ESeriespressuretransmitters
withoptionalcode/KS24forpotentially
explosive atmospheres:
• No. FM 16ATEX0014 X
• Applicable Standard:
EN 60079-0:2012+A11:2013,
EN 60079-11:2012
• Type of Protection and Marking code:
Ex ia IIC T4 Ga
• Group: II
• Category: 1 G
• Ambient Temperature: –50 °C to +60 °C
• Maximum Process Temperature: 120 °C
• Enclosure: IP66/IP67inaccordancewith
only IEC (EN) 60529

<2. Handling Cautions>2-10
IM 01C25W05-01EN
Note 2. Electrical Parameters
• [EJX****-P, EJA****-P]
 Supply/OutputCircuit(Terminals:+,–)
Ui:30V Ii: 200 mA Pi: 0.9 W
Ci: 27.6 nF Li: 0 mH
Communication Circuit (Connector)
Uo:8.2V Io: 160 mA Po: 0.3 W
Co:7.6μF Lo: 1 mH
• [EJX****-S, EJA****-S]
Ui:8.2V Ii: 200 mA Pi: 0.4 W
Ci:6μF Li: 0 mH
Note 3. Installation
• Refer to the control drawing. All wiring shall
comply with local installation requirements.
Communication Circuit
(Connector)
Associated
Apparatus
Non-Hazardous
Area
Hazardous Area
+
–
+
–
Model EJX/EJAxxxx -P
Pressure Transmitters
Model EJX/EJAxxxx -S
Pressure Transmitters
+
–
A
B
Communication: Supply/Output:
Uo = 8.2 V Ui = 30 V
Io = 160 mA Ii = 200 mA
Po = 0.3 W Pi = 0.9 W
Co = 7.6 μF Ci = 27.6 nF
Lo = 1 mH Li = 0 mH
Ui = 8.2 V
Ii = 200 mA
Pi = 0.4 W
Ci = 6 μF
Li = 0 mH
Supply/Output:
F0205.ai
• WARNING – POTENTIAL ELECTROSTATIC
CHARGING HAZARD – WHEN THE
EQUIPMENTISUSEDINHAZARDOUS
LOCATIONS, AVOID ANY ACTIONS WHICH
GENERATE ELECTROSTATIC CHARGES,
SUCHASRUBBINGWITHADRYCLOTH.
• Note: The Associated Apparatus must be a
linear power source.
Note 4. Maintenance and Repair
WARNING
Only personnel authorized by Yokogawa Electric
Corporation can repair the equipment.
Note5. SpecicConditionsofUse
WARNING
• Precautions shall be taken to minimize the
risk from electrostatic discharge of painted
parts.
• When the enclosure of the Pressure
Transmitters is made of aluminum alloy,
if it is mounted in a potentially explosive
atmosphere requiring apparatus of
equipment category 1 G, it must be installed
such that, even in the event of rare incidents,
anignitionsourceduetoimpactand/or
friction sparks is excluded.
• Model EJX****-P and EJA****-P series
pressure transmitters are not capable of
withstanding the dielectric strength of
500 V r.m.s. between the intrinsically safe
circuit and the enclosure.
b. ATEXFlameproofType
CautionforATEXameprooftype.
Note1. EJX/EJA-ESeriespressuretransmitters
withoptionalcode/KF22forpotentially
explosive atmospheres:
• No. KEMA 07ATEX0109 X
• Applicable Standard:
EN 60079-0:2012+A11:2013,
EN 60079-1:2014, EN 60079-31:2014
• Type of Protection and Marking Code:
Ex db IIC T6...T4 Gb, Ex tb IIIC T85°C Db
• Group: II
• Category: 2G, 2D
• Enclosure:IP66/IP67
• Temperature Class for gas-poof:
T6, T5, and T4
• Ambient Temperature for gas-proof:
–50 to 75°C (T6), –50 to 80°C (T5), and
–50 to 75°C (T4)
• Process Temperature (Tp.) for gas-proof:
–50 to 85°C (T6), –50 to 100°C (T5), and
–50 to 120°C (T4)
• Maximum Surface Temperature for dust-proof:
T85°C (Tamb.: –30* to 75°C, Tp.: –30* to 85°C)
  *–15°Cwhen/HEisspecied.