YOKOGAWA EJX Series User Manual

User’s
Manual
Contents
1. Introduction
1.1 ForSafeUseofProduct..............................................2
1.2 Warranty......................................................................3
1.3 ATEXDocumentation..................................................4
2. HandlingCautions
2.1 ModelandSpecicationsCheck.................................6
2.2 SelectingtheInstallationLocation..............................6
2.3 PressureConnection..................................................6
2.4 InstallationofanExplosion-ProtectedInstrument......6
2.5 EMCConformityStandards..................................... 15
2.6 PressureEquipmentDirective(PED)...................... 16
2.7 LowVoltageDirective............................................... 17
3. Installation
3.1 Mounting................................................................... 18
3.2 MountingtheDiaphragmSeals......................................18
3.3 DiaphragmSealsInstallationConsideration............ 19
3.4 MountingtheFlushingConnectionRing.................. 20
3.5 AfxingtheTeonFilm............................................. 21
3.6 RotatingTransmitterSection.................................... 22
3.7 ChangingtheDirectionofIntegralIndicator............. 22
4. InstallingImpulsePiping
4.1 ImpulsePipingInstallationPrecautions................... 23
4.2 ImpulsePipingConnectionExamples..................... 25
4.3 ProcessPipingInstallationPrecautions(EJ115)26
5. Wiring
5.1 WiringPrecautions................................................... 28
5.2 ConnectionsofExternalWiringtoTerminalBox...... 28
5.3 Wiring....................................................................... 30
5.4 RTDCableConnection(EJX910A/EJX930A)......... 31
5.5 Grounding................................................................ 34
5.6 PowerSupplyVoltageandLoadResistance........... 34
6. Operation
6.1 PreparationforStartingOperation........................... 35
6.2 ZeroPointAdjustment.............................................. 36
7. ErrorsandCountermeasures
8. ParameterSummary
1
2
3
4
5
6
7
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EJXandEJA-ESeries
DifferentialPressureand
PressureTransmitters
InstallationManual
IM01C25A01-01E
IM01C25A01-01E
7thEdition
CD-ROMincluded

YOKOGAWA EJX Series Specifications

General

Brand	YOKOGAWA
Model	EJX Series
Category	Transmitter
Language	English

Summary

Introduction

1.1 For Safe Use of Product

Safety and handling precautions for operators and the instrument during installation, wiring, and operation.

Handling Cautions

2.3 Pressure Connection

Important warnings and precautions regarding process connector bolts and handling of process fluids.

2.4 FM Approval

Details FM intrinsically safe and explosionproof type approvals for hazardous locations.

2.4 CSA Certification

Details CSA intrinsically safe and explosionproof type approvals for hazardous locations.

2.4 ATEX Certification

Details ATEX intrinsically safe and flameproof type approvals for hazardous locations.

2.4 IECEx Certification

Details IECEx intrinsically safe and flameproof type approvals for hazardous locations.

Installation

3.1 Mounting

3.2 Mounting the Diaphragm Seals

Guidelines for correctly installing diaphragm seals, including gasket usage and avoiding damage.

Installing Impulse Piping

4.1 Impulse Piping Installation Precautions

General precautions for accurate impulse piping, fluid handling, and connection to the transmitter.

4.1 Connecting Impulse Piping to the Transmitter

4.1 Routing the Impulse Piping

Wiring

5.1 Wiring Precautions

Essential precautions for safe and effective wiring, including noise reduction and explosion protection.

5.2 Connections of External Wiring to Terminal Box

5.2.4 Connection Example for EJX910A and EJX930A

5.4 RTD Cable Connection (EJX910A/EJX930A)

5.5 Grounding

5.6 Power Supply Voltage and Load Resistance

Operation

6.1 Preparation for Starting Operation

6.2 Zero Point Adjustment

Procedure for adjusting the transmitter's zero point using the external screw or communicator.

Errors and Countermeasures

Table 7.1 Alarm Message Summary (Except EJX910A and EJX930A)

Lists alarm messages, causes, output operations, and countermeasures for BRAIN and HART protocols.

Table 7.2 Alarm Message Summary (For EJX910A and EJX930A, HART protocol type)

Summarizes alarm messages specific to EJX910A/EJX930A HART protocol, including causes and solutions.