YOKOGAWA DPharp EJX***A Series User Manual

User’s
Manual
DPharp
HART 5/HART 7 Communication Type
(EJXA, EJAE)
IM 01C25T01-06EN
IM 01C25T01-06EN
7th Edition

YOKOGAWA DPharp EJX***A Series Specifications

General

Brand	YOKOGAWA
Model	DPharp EJX***A Series
Category	Transmitter
Language	English

Summary

1. Introduction

1.1 Safe Use of This Product

Provides safety instructions for installation, wiring, operation, maintenance, and modification of the instrument.

2. Connection

2.2 HART Protocol Revision

2.3 Device Description (DD) on a Configuration Tool and Transmitter Device Revision

2.4 Set the parameters using DTM

Explains how to use DTMs with FieldMate for parameter configuration, including device files.

2.5 Interconnection Between DPharp and the HART Configuration Tool

3. Parameter Setting

3.2 Basic Setup

Covers fundamental setup parameters like Tag and Device Information, and Unit configuration.

3.2.1 Tag and Device Information

3.2.3 Range Change

Explains how to set the upper (URV) and lower (LRV) range values for pressure measurement.

3.2.4 Output Mode

3.2.5 Damping Time Constant Setup

3.2.8 Static Pressure Setup

3.3 Detailed Setup

3.3.2 Analog Output Signal Adjustable Range

3.3.6 Sensor Trim

Explains the sensor trim procedure for adjusting transmitter output to local conditions.

3.3.7 Trim Analog Output

3.3.9 CPU Failure Burnout Direction and Hardware Write Protect

3.3.10 Software Write Protection

3.3.11 Signal Characterizer

3.3.12 Alarm

Describes how to set and configure alarms based on input pressure, static pressure, or temperature.

3.3.13 Status Output (only for EJX series: option code AL)

3.3.15 Test Output, Simulation, and Squawk

3.3.16 Burst Mode

3.3.17 Multidrop Mode

3.3.18 Switching HART Protocol Revision

4. Diagnostics

4.1 Self-Diagnostics

Explains how to perform self-diagnostics using HART configuration tools and interpret results.

4.1.1 Identify Problems by Using HART Configuration Tool

Guides on using Self test and Status commands for diagnosing transmitter issues.

4.1.2 Checking with Integral Indicator

4.2 Advanced Diagnostics (Only for EJX series)

Covers advanced diagnostic functions like Multi-sensing Process Monitoring and Impulse Line Blockage Detection.

4.2.1 Multi-sensing Process Monitoring

4.2.2 Impulse Line Blockage Detection (ILBD)

Explains how ILBD detects blockages using statistical analysis of process fluctuations.

4.2.2.1 Blockage Detection

Details limit parameters used to diagnose impulse lines as blocked based on pressure fluctuation.

4.2.2.3 Operation Parameters

Explains the Diag Mode (Stop, Calculation, Reference) for controlling ILBD operation.

Diag Period

Diag Supp Count

4.2.2.4 Operating Procedure

Outlines the step-by-step flow for performing ILBD operation, including initial settings and checks.

4.2.2.5 Alarm and Alert Setting

Details how to set alarms and alerts for blockage detection and heat trace monitoring.

4.2.2.6 Condition Check

Explains how to check pressure stability and fluctuation values for proper ILBD operation.

4.2.2.7 Obtain Reference Values

Details the procedure to obtain reference values for pressure fluctuation under normal conditions.

4.2.2.8 Capability Test of Blockage Detection Operation

Explains how to test blockage detection capability using simulated conditions.

4.2.2.10 Tuning

Describes how to tune ILBD parameters to improve accuracy by adjusting threshold values or sampling period.

Ratio fDP Compensation

4.2.2.11 Reset of Reference Value

4.2.3 Heat Trace Monitoring

Explains how the transmitter calculates flange temperature and detects heat trace issues.

4.2.3.1 Flg Temp Coef Setting

4.2.3.2 Out of Temperature Measurement Range

4.3 Alarms and Countermeasures

Lists common alarm messages, their causes, output operations, and countermeasures.

HART Configuration Tool Error Messages

Lists error messages from the HART configuration tool, their causes, and countermeasures.

Relationship between Alarm and Status available for HART 7

5. Parameter Summary

Appendix 1. Safety Instrumented Systems Installation

A1.2 Using the transmitter for an SIS Application

Covers safety accuracy, diagnostic response time, setup, and required parameters for SIS.

A1.2.1 Safety Accuracy

A1.2.4 Required Parameter Settings

A1.2.5 Proof Testing

Explains the objective of proof testing to detect undetected failures in safety functions.

Appendix 2. ILBD Check List

Checklist Items and Parameters

Alarm status and ILBD parameters

Covers checking alarm status in Diag Error and recording ILBD parameters like Diag Period and Lim values.

Simulation of Blockage detection operation

Details steps for simulating H Side Blocking, including valve closure and parameter recording.

Simulation of L Side Blocking

Details steps for simulating L Side Blocking, including valve closure and parameter recording.

Simulation of Both Side Blocking

Details steps for simulating Both Side Blocking, including valve closure and parameter recording.