YOKOGAWA Dpharp EJA118N User manual

Instruction
Manual
Yokogawa Electric Corporation
Model EJA118W, EJA118N and
EJA118Y Diaphragm Sealed
Differential Pressure Transmitters
[Style: S2]
IM 1C22H1-01E
IM 1C22H1-01E
10th Edition

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i
CONTENTS
IM 1C22H1-01E
FD No. IM 1C22H1-01E
10th Edition: Feb. 2000(YK)
All Rights Reserved, Copyright © 1995, Yokogawa Electric Corporation
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 ...................................................... 2-2
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............................ 2-3
2.9 Installation of Explosion Protected Type ............................................ 2-3
2.9.1 FM Approval ................................................................................. 2-3
2.9.2 CSA Certification .......................................................................... 2-5
2.9.3 SAA Certification .......................................................................... 2-6
2.9.4 CENELEC (KEMA)/IEC (KEMA) Certification.............................. 2-7
2.9.5 JIS Certification ............................................................................ 2-9
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 .......................................................................... 4-2
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

ii
CONTENTS
IM 1C22H1-01E
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%; ................................................................ 6-2
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 Mode and Integral Indicator Display Mode Setup ........... 7-9
(5) Output Signal Low Cut Mode Setup............................................ 7-9
(6) Integral Indicator Scale Setup................................................... 7-10
(7) Unit Setup for Displayed Temperature ...................................... 7-11
(8) Unit Setup for Displayed Static Pressure.................................. 7-12
(9) Operation Mode Setup.............................................................. 7-12
(10) Impulse Line Connection Orientation Setup ............................. 7-12
(11) Output Status Display/Setup when a CPU Failure.................... 7-12
(12) Output Status Setup when a Hardware Error Occurs ............... 7-12
(13) Bi-directional Flow Measurement Setup ................................... 7-13
(14) Range Change while Applying Actual Inputs ............................ 7-13
(15) Zero Point Adjustment............................................................... 7-14
(16) Test Output Setup ..................................................................... 7-15
(17) User Memo Fields..................................................................... 7-15
7.4 Displaying Data Using the BT200..................................................... 7-16
7.4.1 Displaying Measured Data ......................................................... 7-16
7.4.2 Display Transmitter Model and Specifications........................... 7-16
7.5 Self-Diagnostics ................................................................................ 7-16
7.5.1 Checking for Problems............................................................... 7-16
(1) Identifying Problems with BT200 .............................................. 7-16
(2) Checking with Integral Indicator................................................ 7-17
7.5.2 Errors and Countermeasures..................................................... 7-18

iii
CONTENTS
IM 1C22H1-01E
8. MAINTENANCE.............................................................................................8-1
8.1 Overview ............................................................................................. 8-1
8.2 Calibration Instruments Selection ....................................................... 8-1
8.3 Calibration ........................................................................................... 8-1
8.4 Disassembly and Reassembly............................................................ 8-3
8.4.1 Replacing the Integral Indicator ................................................... 8-3
8.4.2 Replacing the CPU 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........................................................................ 9-6
9.4 Dimensions.......................................................................................... 9-8
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 EJA118W, EJA118N, and EJA118Y Diaphragm Sealed
Differential Pressure Transmitter ............................. CMPL 1C22H1-01E
REVISION RECORD

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IM 1C22H1-01E
1-1
1. INTRODUCTION
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.
jRegarding This Manual
• This manual should be passed on to the end user.
• The contents of this manual are subject to change
without prior notice.
• All rights reserved. No part of this manual may be
reproduced in any form without Yokogawa’s written
permission.
• Yokogawa makes no warranty of any kind with
regard to this manual, including, but not limited to,
implied warranty of merchantability and fitness for a
particular purpose.
• If any question arises or errors are found, or if any
information is missing from this manual, please
inform the nearest Yokogawa sales office.
• The specifications covered by this manual are
limited to those for the standard type under the
specified model number break-down and do not
cover custom-made instruments.
• Please note that changes in the specifications,
construction, or component parts of the instrument
may not immediately be reflected in this manual at
the time of change, provided that postponement of
revisions will not cause difficulty to the user from a
functional or performance standpoint.
NOTE
For FOUNDATION Fieldbus and HART protocol
versions, please refer to IM 1C22T2-01E and IM
1C22T1-01E respectively, in addition to this IM.
jSafety 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 instru-
ment. In case the instrument is handled in contradic-
tion 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, 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.

IM 1C22H1-01E
1-2
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 inhala-
tion of vapors even after dismounting the
instrument from the process line for mainte-
nance.
CAUTION
This instrument is tested and certified as intrinsi-
cally 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.

IM 1C22H1-01E
2-1
2. HANDLING CAUTIONS
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.
Mounting bracket
U-bolt nut
U-bolt
Transmitter
mounting bolt
F0201.EPS
Figure 2.1 Transmitter Mounting Hardware
2.1 Model and Specifications
Check
The model name and specifications are indicated on the
name plate attached to the case. If the reverse operat-
ing mode was ordered (reverse signal), ‘REVERSE’
will be inscribed in field *1; if square root display
mode was ordered, ‘SQRT’ is inscribed in field *2; if
square root output mode was ordered, ‘SQRT’ is
inscribed in field *3.
Figure 2.2 Name Plate Example of JIS Flameproof Type
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.
(b) When storing the transmitter, repack it as nearly as
possible to the way it was packed when delivered
from the factory.
(c) If storing a transmitter that has been used, thor-
oughly clean the diaphragm surface of the dia-
phragm 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.

IM 1C22H1-01E
2-2
2. HANDLING CAUTIONS
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.
(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.
(c) Shock and Vibration
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 Transmit-
ters.”
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 dis-
mounting 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.