Yokogawa EJA438 User Manual

Instruction Manual

Model EJA438W and EJA438N Diaphragm Sealed Gauge Pressure Transmitters

[Style: S2]

IM 1C22J1-01E

Yokogawa Electric Corporation

IM 1C22J1-01E

10th Edition

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CONTENTS

1. INTRODUCTION ............................................................................................ 1-1

WARRANTY.................................................................................................. 1-2

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 ...................................................... 2-1

2.5 Pressure Connection........................................................................... 2-2

2.6 Waterproofing of Cable Conduit Connections .................................... 2-2

2.7 Restrictions on Use of Radio Transceiver .......................................... 2-2

2.8 Insulation Resistance and Dielectric Strength Test............................ 2-2

2.9 Installation of Explosion Protected Type ............................................ 2-3

2.9.1 FM Approval ................................................................................. 2-3

2.9.2 CSA Certification .......................................................................... 2-4

2.9.3 SAA Certification .......................................................................... 2-6

2.9.4 CENELEC (KEMA)/IEC (KEMA) Certification.............................. 2-7

2.9.5 JIS Certification ............................................................................ 2-8

2.10 EMC Conformity Standards ................................................................ 2-9

3. COMPONENT NAMES .................................................................................. 3-1

4. INSTALLATION.............................................................................................4-1

4.1 Precautions ......................................................................................... 4-1

4.2 Mounting the Diaphragm Seals .......................................................... 4-1

4.3 Transmitter Mounting .......................................................................... 4-1

4.4 Affixing the Teflon Film ....................................................................... 4-3

4.5 Rotating Transmitter Section .............................................................. 4-3

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 BRAIN TERMINAL BT200 Connection ........................................ 5-2

5.3.4 Check Meter Connection.............................................................. 5-2

5.4 Wiring .................................................................................................. 5-2

5.4.1 Loop Configuration ....................................................................... 5-2

(1) General-use Type and Flameproof Type ...................................... 5-2

(2) Intrinsically Safe Type................................................................... 5-2

5.4.2 Wiring Installation ......................................................................... 5-3

(1) General-use Type and Intrinsically Safe Type.............................. 5-3

(2) Flameproof Type (JIS).................................................................. 5-3

5.5 Grounding............................................................................................ 5-4

5.6 Power Supply Voltage and Load Resistance ..................................... 5-4

IM 1C22J1-01E

CONTENTS

6. OPERATION..................................................................................................6-1

6.1 Preparation for Starting Operation...................................................... 6-1

6.2 Zero Point Adjustment ........................................................................ 6-2

6.2.1 When you can obtain Low Range Value from actual

measured value of 0% (0 kPa, atmospheric pressure); .............. 6-2

6.2.2 When you cannot obtain Low Range Value from actual

measured value of 0%; ................................................................ 6-3

6.3 Starting Operation ............................................................................... 6-3

6.4 Shutting Down Operation.................................................................... 6-3

6.5 Setting the Range Using the Range-setting Switch ........................... 6-4

7. BRAIN TERMINAL BT200 OPERATION ..................................................... 7-1

7.1 BT200 Operation Precautions............................................................. 7-1

7.1.1 Connecting the BT200 ................................................................. 7-1

7.1.2 Conditions of Communication Line .............................................. 7-1

7.2 BT200 Operating Procedures ............................................................. 7-1

7.2.1 Key Layout and Screen Display................................................... 7-1

7.2.2 Operating Key Functions.............................................................. 7-2

(1) Alphanumeric Keys and Shift Keys .............................................. 7-2

(2) Function Keys............................................................................... 7-2

7.2.3 Calling Up Menu Addresses Using the Operating Keys.............. 7-3

7.3 Setting Parameters Using the BT200 ................................................. 7-4

7.3.1 Parameter Summary .................................................................... 7-4

7.3.2 Parameter Usage and Selection .................................................. 7-6

7.3.3 Setting Parameters ....................................................................... 7-7

(1) Tag No. Setup ............................................................................... 7-7

(2) Calibration Range Setup .............................................................. 7-7

(3) Damping Time Constant Setup..................................................... 7-8

(4) Output Signal Low Cut Mode Setup ............................................. 7-9

(5) Integral Indicator Scale Setup ...................................................... 7-9

(6) Unit Setup for Displayed Temperature........................................ 7-11

(7) Operation Mode Setup ............................................................... 7-11

(8) Output Status Display/Setup when a CPU Failure ..................... 7-11

(9) Output Status Setup when a Hardware Error Occurs................. 7-11

(10)Range Change while Applying Actual Inputs.............................. 7-12

(11)Zero Point Adjustment ................................................................ 7-12

(12)Test Output Setup....................................................................... 7-14

(13)User Memo Fields ...................................................................... 7-14

7.4 Displaying Data Using the BT200..................................................... 7-14

7.4.1 Displaying Measured Data ......................................................... 7-14

7.4.2 Display Transmitter Model and Specifications........................... 7-14

7.5 Self-Diagnostics ................................................................................ 7-15

7.5.1 Checking for Problems............................................................... 7-15

(1) Identifying Problems with BT200................................................ 7-15

(2) Checking with Integral Indicator ................................................. 7-16

7.5.2 Errors and Countermeasures..................................................... 7-17

8. MAINTENANCE ............................................................................................. 8-1

8.1 Overview ............................................................................................. 8-1

8.2 Calibration Instruments Selection ....................................................... 8-1

8.3 Calibration ........................................................................................... 8-1

IM 1C22J1-01E

CONTENTS

8.4 Disassembly and Reassembly............................................................ 8-3

8.4.1 Replacing the Integral Indicator ................................................... 8-3

8.4.2 Replacing the CPU Assembly...................................................... 8-4

8.5 Troubleshooting................................................................................... 8-5

8.5.1 Basic Troubleshooting.................................................................. 8-5

8.5.2 Troubleshooting Flow Charts ....................................................... 8-5

9. GENERAL SPECIFICATIONS ...................................................................... 9-1

9.1 Standard Specifications ...................................................................... 9-1

9.2 Model and Suffix Codes...................................................................... 9-3

9.3 Optional Specifications........................................................................ 9-5

9.4 Dimensions.......................................................................................... 9-7

INSTALLATION AND OPERATING PRECAUTIONS FOR

JIS INTRINSICALLY SAFE EQUIPMENT.......................................... EX-A03E

INSTALLATION AND OPERATING PRECAUTIONS FOR

JIS FLAMEPROOF EQUIPMENT....................................................... EX-B03E

Customer Maintenance Parts List

DPharp EJA Series Transmitter Section ............................ CMPL 1C22A1-02E

Models EJA438W and EJA438N Diaphragm Sealed

REVISION RECORD

Gauge Pressure Transmitter..................................... CMPL 1C22J3-01E

iii

IM 1C22J1-01E

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1. INTRODUCTION

NOTE

1. INTRODUCTION

Thank you for purchasing the DPharp electronic pressure transmitter.

The DPharp Pressure Transmitters are precisely calibrated at the factory before shipment. To ensure correct and efficient use of the instrument, please read this manual thoroughly and fully understand how to operate the instrument before operating it.

j Regarding This Manual

• This manual should be passed on to the end user.

• The contents of this manual are subject to change without prior notice.

• 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.

j Safety Precautions

• For the protection and safety of the operator and the instrument or the system including the instrument, please be sure to follow the instructions on safety described in this manual when handling this instrument. In case the instrument is handled in contradiction to these instructions, Yokogawa does not guarantee safety.

• For the intrinsically safe equipment and explosionproof equipment, in case the instrument is not restored to its original condition after any repair or modification undertaken by the customer, intrinsically safe construction or explosionproof construction is damaged and may cause dangerous condition. Please contact Yokogawa for any repair or modification required to the instrument.

• The following safety symbol marks are used in this Manual:

WARNING

Indicates a potentially hazardous situation which, if not avoided, 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

could

result in death or serious

NOTE

For FOUNDATION Fieldbus and HART protocol versions, please refer to IM 1C22T2-01E and IM 1C22T1-01E respectively, in addition to this IM.

IMPORTANT

Indicates that operating the hardware or software in this manner may damage it or lead to system failure.

Draws attention to information essential for understanding the operation and features.

1-1

IM 1C22J1-01E

1. INTRODUCTION

WARRANTY

• The warranty shall cover the period noted on the quotation presented to the purchaser at the time of purchase. Problems occurred during the warranty period shall basically be repaired free of charge.

• In case of problems, the customer should contact the Yokogawa representative from which the 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.

• Responsible party for repair cost for the problems shall be determined by Yokogawa based on our investigation.

• 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.

- Failure or damage due to improper handling, use or

storage which is out of design conditions.

- 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.

WARNING

• Instrument installed in the process is under pressure. Never loosen or tighten the flange bolts as it may cause dangerous spouting of process fluid.

• Since the accumulated process fluid may be toxic or otherwise harmful, take appropriate care to avoid contact with the body, or inhalation of vapors even after dismounting the instrument from the process line for maintenance.

CAUTION

This instrument is tested and certified as intrinsically safe type or explosionproof type. Please note that the construction of the instrument, installation, external wiring, maintenance or repair is strictly restricted, and non-observance or negligence of this restriction would result in dangerous condition.

1-2

IM 1C22J1-01E

2. HANDLING CAUTIONS

This chapter describes important cautions regarding how to handle the transmitter. Read carefully before using the transmitter.

The EJA Series pressure transmitters are thoroughly tested at the factory before shipment. When the transmitter is delivered, 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 was ordered without the mounting bracket, the transmitter mounting hardware is not included. After checking the transmitter, repack it in the way it was delivered until installation.

Transmitter mounting bolt

U-bolt

2.2 Unpacking

When moving the transmitter to the installation site, keep it in its original packaging. Then, unpack the transmitter there to avoid damage on the way.

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 water.

• It suffers minimum vibration and shock.

• 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:

5% to 100% R.H. (at 40°C)

Preferred temperature and humidity:

approx. 25°C and 65% R.H.

U-bolt nut

Figure 2.1 Transmitter Mounting Hardware

Mounting bracket

F0201.EPS

2.1 Model and Specifications Check

The model name and specifications are indicated on the name plate attached to the case. If the reverse operating mode was ordered (reverse signal), ‘REVERSE’ will be inscribed in field *1.

Figure 2.2 Name Plate Example of JIS Flameproof Type

(b) When storing the transmitter, repack it as nearly

as possible to the way it was packed when delivered from the factory.

thoroughly clean the diaphragm surface of the diaphragm seal (pressure-detector section), so that no measured fluid remains on them. Also make sure before storing that the pressure-detector and transmitter assemblies are securely mounted.

2.4 Selecting the Installation Location

The transmitter is designed to withstand severe environmental conditions. However, to ensure stable and accurate operation for years, observe the following precautions when selecting an 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 equipments, provide adequate thermal insulation and/or ventilation.

2-1

IM 1C22J1-01E

2. HANDLING CAUTIONS

(b) Ambient Atmosphere

Avoid installing the transmitter in a corrosive atmosphere. If the transmitter must be installed in a corrosive atmosphere, there must be adequate ventilation as well as measures to prevent intrusion or stagnation of rain water in conduits.

Select an installation site suffering minimum shock and vibration (although the transmitter is designed to be relatively resistant to shock and vibration).

(d) Installation of Explosion-protected Transmitters

Explosion-protected transmitters can be installed in hazardous areas according to the types of gases for which they are certified. See Subsection 2.9 “Installation of Explosion Protected Type Transmitters.”

2.5 Pressure Connection

WARNING

• Instrument installed in the process is under pressure. Never loosen or tighten the flange bolts to avoid the dangerous spouting of process fluid.

• Since the accumulated process fluid may be toxic or otherwise harmful, take appropriate care to avoid contact with the skin, eyes or body, or inhalation of vapors even after dismounting the instrument from process line for maintenance.

The following precautions must be observed in order to safely operate the transmitter under pressure.

(a) Never apply a pressure higher than the specified

maximum working pressure.

(b) Never loosen or tighten the bolts securing the

diaphragm seal flanges when the assembly is under pressure. Do it after releasing the process pressure if required.

2.6 Waterproofing of Cable Conduit Connections

Apply a non-hardening sealant to the threads to waterproof the transmitter cable conduit connections. (See Figure 5.4.2a, 5.4.2b and 5.4.2d.)

2.7 Restrictions on Use of Radio Transceiver

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 for such effects, bring the transceiver in use slowly from a distance of several meters from the transmitter, and observe the measurement loop for noise effects. Thereafter, always use the transceiver outside the area affected by noise.

2.8 Insulation Resistance and Dielectric Strength Test

Since the transmitter has undergone insulation resistance and dielectric strength tests at the factory before shipment, normally these tests are not required. However, if required, observe the following precautions in the test procedures.

(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.

lines from the transmitter terminals. Perform the tests in the following procedure:

• 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.

3) Turn ON the insulation tester power and measure

the insulation resistance. The voltage should be applied short as possible to verify that the insulation resistance is at least 20 MΩ.

2-2

IM 1C22J1-01E

2. HANDLING CAUTIONS

4) 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 shortcircuiting 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 Explosion

Protected Type

NOTE

For FOUNDATION Fieldbus explosion protected type, please refer to IM 1C22T2-01E.

WARNING

To pressure the safety of explosionproof equipment requires great care during mounting, wiring, and piping. Safety requirements also place restrictions on maintenance and repair activities. Please read the following sections very carefully.

2.9.1 FM Approval

a. FM Intrinsically Safe Type

Caution for FM intrinsically safe type. (Following contents refer “DOC. No. IFM012-A12 P.1 and 2.”)

Note 1. Model EJA Series pressure transmitters

with optional code /FS1 are applicable for use in hazardous locations.

• 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 Hazardous Locations.

• Nonincendive for Class I, Division 2, Groups A, B, C & D. Class II, Division 2, Groups E, F & G and Class III, Division 1 Hazardous Locations.

• Outdoor hazardous locations, NEMA 4X.

• Temperature Class: T4

• Ambient temperature: –40 to 60°C

Note 2. Entity Parameters

• Intrinsically Safe Apparatus Parameters [Groups A, B, C, D, E, F and G] Vmax = 30 V Ci = 22.5 nF Imax = 165 mA Li = 730 µH Pmax = 0.9 W

* Associated Apparatus Parameters

(FM approved barriers) Voc ≤ 30 V Ca > 22.5 nF Isc ≤ 165 mA La > 730 µH Pmax ≤ 0.9W

• Intrinsically Safe Apparatus Parameters [Groups C, D, E, F and G] Vmax = 30 V Ci = 22.5 nF Imax = 225 mA Li = 730 µH Pmax = 0.9 W

* Associated Apparatus Parameters

(FM approved barriers) Voc ≤ 30 V Ca > 22.5 nF Isc ≤ 225 mA La > 730 µH Pmax ≤ 0.9 W

• Entity Installation Requirements Vmax ≥ Voc or Vt, Imax ≥ Isc or It, Pmax (IS Apparatus) ≥ Pmax (Barrier) Ca ≥ Ci + Ccable, La ≥ 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.

2-3

IM 1C22J1-01E

2. HANDLING CAUTIONS

• 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 0.9 W.

• Note a warning label worded “SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY,” and “INSTALL IN ACCORDANCE WITH DOC. No. IFM012-A12 P.1 and 2.”

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.

[Intrinsically Safe]

Hazardous Location Nonhazardous Location

Class I, II, III, Division 1, Groups A, B, C, D, E, F, G

EJA 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.

EJA Series Pressure Transmitters

Supply

–

[Nonincendive]

+ –

Safety Barrier

+ –

Not Use Safety Barrier

+ –

General Purpose Equipment

+ –

General Purpose Equipment

+ –

F0203.EPS

b. FM Explosionproof Type

Caution for FM explosionproof type.

Note 1. Model EJA Series differential, gauge, and

absolute pressure transmitters with optional code /FF1 are applicable for use in hazardous locations.

• Explosionproof for Class I, Division 1, Groups B, C and D.

• Dust-ignitionproof for Class II/III, Division 1, Groups E, F and G.

• Outdoor hazardous locations, 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/NEPA70 and Local Electrical Codes.

• When installed in Division 1, “FACTORY SEALED, CONDUIT SEAL NOT REQUIRED.”

Note 3. Operation

• Keep the “CAUTION” nameplate attached to the transmitter. CAUTION: OPEN CIRCUIT BEFORE REMOVING COVER. SEAL ALL CONDUITS WITHIN 18 INCHES. WHEN INSTALLED IN DIV.1, “FACTORY SEALED, CONDUIT SEAL NOT REQUIRED.” INSTALL IN ACCORDANCE WITH THE INSTRUCTION MANUAL IM 1C22.

• 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 EJA 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. ICS003-A12 P.1-1 and P.1-2.”)

Note 1. Model EJA Series differential, gauge,

and absolute pressure transmitters with optional code /CS1 are applicable for use in hazardous locations

2-4

IM 1C22J1-01E

2. HANDLING CAUTIONS

• 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 Hazardous Locations.

• Nonincendive for Class I, Division 2, Groups A, B, C & D, Class II, Division 2, Groups F & G, and Class III, Hazardous Locations. (not use Safety Barrier)

• Encl. “Type 4X”

• Temperature Class: T4

• Ambient temperature: –40 to 60°C

• Process Temperature: 120°C max.

Note 2. Entity Parameters

• Intrinsically safe ratings are as follows:

Maximum Input Voltage (Vmax) = 30 V Maximum Input Current (Imax) = 165 mA Maximum Input Power (Pmax) = 0.9 W Maximum Internal Capacitance (Ci) = 22.5 nF Maximum Internal Inductance (Li) = 730 µH

* Associated apparatus (CSA certified barriers)

Maximum output voltage (Voc) ≤ 30 V Maximum output current (Isc) ≤ 165 mA Maximum output power (Pmax) ≤ 0.9 W

Note 3. Installation

• All wiring shall comply with Canadian Electrical Code Part I and Local Electrical Codes.

• 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.

[Intrinsically Safe]

Hazardous Location Nonhazardous Location

Class I, II, III, Division 1, Groups A, B, C, D, E, F, G

EJA Series Pressure Transmitters

Supply

Hazardous Location Nonhazardous Location

Class I, II, Division 2, Groups A, B, C, D, E, F, G Class III

EJA Series Pressure Transmitters

Supply

–

[Nonincendive]

+ –

Safety Barrier

–

Not Use Safety Barrier

General Purpose Equipment

+ –

F0204.EPS

b. CSA Explosionproof Type

Caution for CSA explosionproof type.

Note 1. Model EJA Series differential, gauge, and

absolute pressure transmitters with optional code /CF1 are applicable for use in hazardous locations:

• Explosionproof for Class I, Division 1, Groups B, C and D.

• Dust-ignitionproof for Class II/III, Division 1, Groups E, F and G.

• Encl “Type 4X”

• Temperature Class: T6, T5, and T4

• Process Temperature: 85°C (T6), 100°C (T5), and 120°C (T4)

• Ambient Temperature: –40 to 80°C

• Supply Voltage: 42 V dc max.

• Output Signal: 4 to 20 mA

Note 2. Wiring

• 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.

CAUTION: SEAL ALL CONDUITS WITHIN 50 cm OF THE ENCLOSURE. UN SCELLEMENT DOIT ÊTRE INSTALLÉ À MOINS DE 50 cm DU BÎTIER.

• When installed in Division 2, “SEALS NOT REQUIRED.”

Note 3. Operation

• Keep the “CAUTION” label attached to the transmitter.

CAUTION: OPEN CIRCUIT BEFORE REMOVING COVER. OUVRIR LE CIRCUIT AVANT D´NLEVER LE COUVERCLE.

• Take care not to generate mechanical sparking when accessing to the instrument and peripheral devices in a hazardous location.

Note 4. Maintenance and Repair

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IM 1C22J1-01E

2. HANDLING CAUTIONS

Non-Hazardous

Locations

Non-hazardous Location Equipment

42 V DC Max. 4 to 20 mA DC Signal

Non-Hazardous

Locations

Non-hazardous Location Equipment

42 V DC Max. 4 to 20 mA DC Signal

Hazardous Locations Division 1

50 cm Max.

Sealing Fitting

Hazardous Locations Division 2

Sealing Fitting

Conduit

EJA Series

F0205.EPS

c. CSA Intrinsically Safe Type/CSA

Explosionproof Type

Model EJA 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,

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.

Note 2. Entity Parameters

• Intrinsically safe rating of the transmitters are as follows.

Maximum Input Voltage (Ui) = 30 V Maximum Input Current (Ii) = 165 mA Maximum Input Power (Pi) = 0.9 W Maximum Internal Capacitance (Ci) = 0.02 µF Maximum Internal Inductance (Li) = 0.73 mH

Note 3. Wiring

• All Wiring shall comply with the Australian Standard.

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 Standards Association of Australia Intrinsically safe and Type n Certification.

[Intrinsic Safety]

Hazardous Location Nonhazardous Location

(Zone 0)

EJA Series Pressure Transmitter

*1: Any safety barriers used for the output current must be

limited by a resistor “R” such that Imaxout-Uz/R.

Hazardous Location

EJA Series Pressure Transmitter

+ –

[Type n]

(Zone 2)

+ –

Safety Barrier

–

Power Supply

–

F0206.EPS

2.9.3 SAA Certification

a. SAA Intrinsically Safe Type

Caution for SAA Intrinsically safe type and Type n.

Note 1. Model EJA Series differential, gauge, and

absolute pressure transmitters with optional code /SU1 are applicable for use in hazardous locations.

• Type of Protection and Marking Code:

Ex ia IIC T4 (Tamb = 60°C) IP67 Class I Zone 0

• Type of Protection and Marking Code:

Ex n IIC T4 (Tamb = 60°C) IP67 Class I Zone 2

• Ambient Temperature: –40 to 60°C

*2: The voltage of the power supply is not exceed 30V dc.

b. SAA Flameproof Type

Caution for SAA flameproof type.

Note 1. Model EJA Series differential, gauge, and

absolute pressure transmitters with optional code /SU1 are applicable for use in hazardous locations:

• Type of Protection and marking Code: Ex d II C T* IP67 Class I Zone 1 (T* see schedule)

• Temperature Class: T6, T5, and T4

• Process Temperature: 85°C (T6), 100°C (T5), and 120°C (T4)

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IM 1C22J1-01E

F0207.EPS

2. HANDLING CAUTIONS

• Supply voltage: 42 V dc max.

• Output Signal: 4 to 20 mA

• Ambient Temperature: –40 to 80°C

Note 2. Wiring

• All wiring shall comply with the Australian Standard.

Note 3. Operation

• Keep the “CAUTION” label attached to the transmitter.

CAUTION: AMBIENT TEMPERATURE ABOVE 75 DEG C SELECT SUITABLE CABLE. DISCONNECT POWER AND WAIT 1 MINUTE BEFORE REMAKING COVER.

• Take care not to generate mechanical sparking when accessing to the instrument and peripheral devices in a hazardous location.

Note 4. Maintenance and Repair

2.9.4 CENELEC (KEMA)/IEC (KEMA) Certification

a. CENELEC (KEMA) Intrinsically Safe Type

Caution for CENELEC (KEMA) intrinsically safe type.

Note 1. Model EJA Series differential, gauge, and

absolute pressure transmitters with optional code /KS1 for potentially explosive atmospheres:

• Type of Protection and Marking code: EEx ia IIC T4

• Temperature Class: T4

• Process Temperature: 120°C max.

• Ambient Temperature: –40 to 60°C

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 = 165 mA Pi = 0.9 W Effective internal capacitance; Ci = 22.5 nF Effective internal inductance; Li = 730 µH

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.

[Installation Diagram]

Hazardous Location

Transmitter

Supply

–

*1: In any safety barriers used the output current must be limited

by a resistor “R” such that Imaxout-Uz/R.

Nonhazardous Location

Safety Barrier

–

F0208.EPS

b. CENELEC (KEMA) Flameproof Type

Caution for CENELEC (KEMA) flameproof type.

Note 1. Model EJA Series differential, gauge, and

absolute pressure transmitters with optional code /KF1 for potentially explosive atmospheres:

• Type of Protection and Marking Code: EEx d IIC T6···T4

• Temperature Class: T6, T5, and T4

• Maximum Process Temperature: 85°C (T6), 100°C (T5), and 120°C

• Ambient Temperature: –40 to 80°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 requirement.

• The cable entry devices shall be of a certified flameproof type, suitable for the conditions of use.

Note 4. Operation

• Keep the “CAUTION” label to the transmitter.

CAUTION: WAIT 1 MIN. AFTER POWER-DISCONNECTION, BEFORE OPENING THE ENCLOSURE.

• 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 parts replacement by other than authorized representative of Yokogawa Electric Corporation is prohibited and will void KEMA Flameproof Certification.

2-7

IM 1C22J1-01E

2. HANDLING CAUTIONS

c. IEC (KEMA) Type of Protection “n”

Caution for IEC (KEMA) Type of Protection “n.”

Note 1. Model EJA Series pressure transmitters

with optional code /KU1 for potentially explosive atmospheres.

• Type of Protection and Marking Code: Ex nA IIC T4

• Temperature Class: T4

• Process Temperature: 120°C max.

• Ambient Temperature: –40 to 60°C

Note 2. Electrical Data

• Supply and output circuit ≤ 30 V dc, 165 mA (terminals + and –)

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 Type of Protection “n” Certification.

[Installation Diagram]

Hazardous Location

(Zone 2 only)

Transmitter

Supply

–

Nonhazardous Location

Power Supply

–

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.

2.9.5 JIS Certification

JIS Flameproof and Intrinsically Safe Type The model EJA Series pressure transmitters with

optional code /JF1 and /JS1, which have obtained certification according to technical criteria for explosion-protected construction of electric machinery and equipment(Standards Notification No. 556 from the Japanese Ministry of Labor) conforming to IEC standards, are designed for hazardous areas where explosive gases and/or inflammable vapors may be present. [JIS Flameproof Type(optional code /JF1) allows installation in Division 1 and 2 areas, and JIS Intrinsically Safe Type(optional code /JS1) allows installation in Division 0, 1, and 2 areas.]

To observe the safety of flameproof equipment requires great care during mounting, wiring, and piping. Safety requirements also place restrictions on maintenance and repair activities. Users absolutely must read “Installation and Operating Precautions for JIS Intrinsically Safe Equipment and Flameproof Equipment” at the end of this manual.

CAUTION

(For JIS flameproof type without integral indicator)

F0209.EPS

Ratings of the Power Supply as follows;

Maximum Voltage: 30 V Maximum Current: 165 mA

d. CENELEC (KEMA) Intrinsically Safe Type/

CENELEC (KEMA) Flameproof Type/IEC (KEMA) Type of Protection “n”

Model EJA Series pressure transmitters with optional code /KU1 can be selected the type of protection (CENELEC (KEMA) Intrinsically Safe or CENELEC (KEMA) Flameproof or IEC (KEMA) Type of Protection “n”) for use in hazardous locations.

Note 1. For the installation of this transmitter,

When the fill fluid near the sensor part moves from within, the instrument outputs a failure signal either high or low of the specific signal. In that case, generate the alarm to identify that the failure signal is output since the event may invalidate the flameproof approval. If the optional integral indicator is equipped, the indicator identifies the alarm on its display. Therefore, no other alarm generation is necessary.

Hazardous Location Nonhazardous Location

4 to 20 mA DC 1 to 5 V DC

Transmitter

Figure 2.3 Example of using DCS (Distributed Control

System)

Power Supply

DCS

Display

F0210.EPS

2-8

IM 1C22J1-01E

2.10 EMC Conformity Standards

For EMI (Emission): EN55011, AS/NZS 2064 1/2 For EMS (Immunity): EN50082–2

NOTE

YOKOGAWA recommends customer to apply the Metal Conduit Wiring or to use the twisted pair Shield Cable for signal wiring to conform the requirement of EMC Regulation, when customer installs the EJA Series Transmitters to the plant.

2. HANDLING CAUTIONS

2-9

IM 1C22J1-01E

3. COMPONENT NAMES

Transmitter section*

*See below for details.

3. COMPONENT NAMES

Cover flange

Capillary tube

Diaphragm seal

Diaphragm

Flange

Pressure-detector section

F0301.EPS

Figure 3.1.1 Component Names (Model EJA438W External View)

Transmitter section

External indicator conduit connection

(Note 1)

Terminal box cover

Conduit connection

CPU assembly

Integral indicator

(Note 1)

Zero-adjustment screw

Mounting screw

Cover

Pressure-detector section

flange

Setting pin

Amplifier cover

(CN4)

Range-setting switch (See Subsection 6.5)

(Note 1)

Setting pin (CN4)

(Note 2)

position

H L

Burn-out direction

HIGH

LOW

Output at burn-out

110% or

higher

5% or

lower

F0302.EPS

Note 1: Options depend on your order specifications. For details, see Subsection 9.2, “Model and Suffix Codes.” Note 2: • Insert the pin (CN4) as shown in the above figure into the H or L side. The pin is set to the H side for delivery (unless

option code /C1 is otherwise specified in the order).

• The setting can be confirmed by calling up parameter D52 using the BRAIN TERMINAL. Refer to Subsection. 7.3.2 (8).

Display Symbol

Meaning of Display Symbol

The output signal being zero-adjusted is increasing. The output signal being zero-adjusted is decreasing.

%, Pa, hPa, kPa, MPa, kgf/cm atm, mmHg, mmH

O, inH2O, inHg, ftH2O, psi, Torr

, gf/cm2, mbar, bar,

Select one of these seventeen available engineering units for the display.

Figure 3.1.2 Component Names (Transmitter Section Details)

T0301.EPS

3-1

IM 1C22J1-01E

4. INSTALLATION

4.1 Precautions

j Before installing the transmitter, read the cautionary

notes in Section 2.4, “Selecting the Installation Location.” For additional information on the ambient conditions allowed at the installation location, refer to Subsection 9.1 “Standard Specifications.”

IMPORTANT

• When welding piping during construction, take care not to allow welding currents to flow through the transmitter.

• Do not step on this instrument after installation.

4.2 Mounting the Diaphragm Seals

Mount the diaphragm seals using the flanges as shown in Figure 4.2.1. Figure 4.2.2 shows how to mount the diaphragm seals on a tank. The customer should prepare the mating flange, gasket, bolts and nuts.

IMPORTANT

• During the diaphragm seal installation, ensure as far as possible that no seal liquid head is applied to the diaphragm seal.

• Exercise care so as not to damage diaphragm surface. Since the diaphragm protrudes approx. 1mm from the flange surface, placing the diaphragm seals with its diaphragm surface facing downward may damage the diaphragm surface.

• Do not sharply bend or twist capillary tube or apply excessive stress to it.

IMPORTANT

Install the sealed diaphragm so that the shank positions downward.

Capillary tube

Diaphragm seal

Flange

Bolt

The product is shipped with these parts assembled.

Correctly install the diaphragm seals on the high and low pressure sides of the process, checking the label on each seal.

Figure 4.2.1 Mounting the Diaphragm Seals

Diaphragm

ød

Gasket

Nut

IMPORTANT

Please use a gasket which has a bigger inside diameter than that of gasket facing (ød) on diaphragm seal. In case a gasket which has a smaller inside diameter than that of gasket facing is used, it may cause an error as the gasket prevents diaphragm from working correctly. (Refer to Subsection 9.4 ‘Dimensions’)

F0401.EPS

F0402.EPS

Figure 4.2.2 Installing the Diaphragm Seals to a Tank

4.3 Transmitter Mounting

j The transmitter can be mounted on a nominal 50

mm (2-inch) pipe using the mounting bracket supplied, as shown in Figure 4.3.1 The transmitter can be mounted on either a horizontal or a vertical pipe.

j When mounting the bracket on the transmitter,

tighten the (four) bolts that hold the transmitter to a torque of approximately 39 N·m {4 kgf·m}.

IMPORTANT

Never loosen the four screws securing the cover flange or the screws at the joints between the capillary tube and cover flanges (if the seal liquid leaks, the transmitter cannot be used).

4-1

IM 1C22J1-01E

Vertical pipe mounting

Horizontal pipe mounting

U-bolt nut

Transmitter mounting bolt

4. INSTALLATION

IMPORTANT

The transmitter should be installed at least 700 mm (when the model code of the material of the wetted part is H, at least 1300 mm) below the process connection to ensure a positive head pressure of fill fluid. If it can not be installed at least 700 mm below the process connection, please use the equation below:

(P–P0)3dHg

h= 37.5310–3 [mm]

h: Vertical height between the process

connection and the transmitter (mm) h≤0: Install the transmitter at least h (mm)

below the process connection

h>0: Install the transmitter at most h (mm)

above the process connection P: Pressure in the tank (Pa abs) P0: Minimum working pressure limit of the

transmitter (Pa abs)

If the ambient temperature range is

–10 to 50°C.

5254 (Wetted parts material code S)

6980 (Wetted parts material code T)

13019 (Wetted parts material code H)

6980 (Wetted parts material code U) ds: Specific gravity of fill fluid (at 25°C), refer

to GS 1C22J3-E.

dHg:Specific gravity of the Mercury 13.6 (at

25°C)

Mounting bracket

50mm (2-inch) pipe

Figure 4.3.1 Transmitter Mounting

U-bolt

F0403.EPS

(+)

(–)

F0404.EPS

Figure 4.3.2 Example of Installation to Tank (Caution on

Installation)

4-2

IM 1C22J1-01E

4. INSTALLATION

4.4 Affixing the Teflon Film

The FEP Teflon option includes a teflon film and fluorinated oil. Before mounting the diaphragm seal to the process flange, affix the teflon film as follows :

IMPORTANT

(1) Position the diaphragm seal so that the

diaphragm is in a upward position.

(2) Pour the fluorinated oil on the diaphragm and

gasket area covering it completely and evenly. Be careful not to scratch the diaphragm or change the its shape.

(3) Affix the teflon film over the diaphragm and

gasket area.

(4) Next, carefully inspect the cover and try to

identify any entrapped air between the diaphragm and the teflon film. The air must be removed to ensure accuracy. If air pockets are present, use your fingers to remove the air by starting at the center of the diaphragm and work your way out.

(5) Place the gasket with the teflon film and affix

to the process flange.

Teflon film

PART No.

F9347XA F9347YA

Process flange size

For 3inch (80 mm) For 2inch (50 mm)

4.5 Rotating Transmitter Section

The DPharp transmitter section can be rotated in 90° segments.

(1) Remove the two Allen screws that fasten the

transmitter section and pressure-detector section, using the Allen wrench supplied with the transmitter.

(2) Rotate the transmitter section slowly in 90°

segments.

(3) Tighten the two Allen screws.

IMPORTANT

Do not rotate the transmitter section more than 180°.

Transmitter section

Rotate 90° or 180° segments

Conduit connection

Zero-adjustment screw

Fluorinated oil [PART No.: F9145YN]

Diaphragm

Gasket area

Diaphragm seal

Figure 4.4.1 Affixing the Teflon Film

F0405.EPS

Pressure-detector section

Figure 4.5.1 Rotating Transmitter Section

4-3

F0406.EPS

IM 1C22J1-01E

5. WIRING

5.1 Wiring Precautions

IMPORTANT

• Lay wiring as far as possible from electrical noise sources such as large capacity transformers, motors, and power supplies.

• Remove electrical connection dust cap before wiring.

• All threaded parts must be treated with waterproofing sealant. (A non-hardening silicone group sealant is recommended.)

• To prevent noise pickup, do not pass signal and power cables through the same ducts.

• Explosion-protected instruments must be wired in accordance with specific requirements (and, in certain countries, legal regulations) in order to preserve the effectiveness of their explosionprotected features.

• The terminal box cover is locked by an Allen head bolt (a shrouding bolt) on CENELEC, SAA, and JIS flameproof type transmitters. When the shrouding bolt is driven clockwise by an Allen wrench, it is going in and cover lock is released, and then the cover can be opened. See Subsection 8.4 “Disassembly and Reassembly” for details.

Refer to The “Installation and Operating Precautions for JIS Flameproof Equipment” and “Installation and Operating Precautions for JIS Intrinsically Safe Equipment” at the end of this manual for correct wiring.

CAUTION

If the transmitter is flameproof and the ambient temperature is 50°C or more, use cables having a maximum allowable heat resistance of at least 75°C in consideration of the instrument's generation of heat or the cables' self-heating.

(d) In environment where oils, solvents, corrosive gases

or liquids may be present, use wires or cables that are resistant to such substances.

(e) It is recommended that crimp-on solderless terminal

lugs (for 4 mm screws) with insulating sleeves be used for leadwire ends.

5.3 Connections of External Wiring to Terminal Box

5.3.1 Power Supply Wiring Connection

Connect the power supply wiring to the SUPPLY + and – terminals.

Transmitter terminal box

Power supply

–

F0501.EPS

Figure 5.3.1 Power Supply Wiring Connection

5.2 Selecting the Wiring Materials

(a) Use stranded leadwires or cables which are the

same as or better than 600 V grade PVC insulated wire (JIS C3307) or equivalent.

(b) Use shielded wires in areas that are susceptible to

electrical noise.

use appropriate wires or cables.

5.3.2 External Indicator Connection

Connect wiring for external indicators to the CHECK + and – terminals.

(Note) Use a external indicator whose internal resistance is 10 Ω or

less.

Power supply

+ –

Transmitter terminal box

Figure 5.3.2 External Indicator Connection

5-1

External indicator

IM 1C22J1-01E

F0502.EPS

+ 50 hidden pages

Yokogawa EJA438 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

1. INTRODUCTION

WARRANTY

2. HANDLING CAUTIONS

2.2 Unpacking

2.3 Storage

2.1 Model and Specifications Check

2.4 Selecting the Installation Location

2.5 Pressure Connection

2.6 Waterproofing of Cable Conduit Connections

2.7 Restrictions on Use of Radio Transceiver

2.8 Insulation Resistance and Dielectric Strength Test

2.9.1 FM Approval

2.9.2 CSA Certification

2.9.3 SAA Certification

2.9.4 CENELEC (KEMA)/IEC (KEMA) Certification

2.9.5 JIS Certification

2.10 EMC Conformity Standards

3. COMPONENT NAMES

4. INSTALLATION

4.1 Precautions

4.2 Mounting the Diaphragm Seals

4.3 Transmitter Mounting

4.4 Affixing the Teflon Film

4.5 Rotating Transmitter Section

5. WIRING

5.1 Wiring Precautions

5.3 Connections of External Wiring to Terminal Box

5.3.1 Power Supply Wiring Connection

5.3.2 External Indicator Connection