Azbil JTD720A User manual

CM2-DST720-2001
Smart Multivariable Transmitter
Model: JTD720A
User’s Manual

Copyright, Notices and Trademarks
© 2004-2020 Azbil Corporation. All Rights Reserved.
While this information is presented in good faith and believed to
be accurate, Azbil Corporation disclaims the implied warranties of
merchantability and tness for a particular purpose and makes no
express warranties except as may be stated in its written agreement with
and for its customer.
In no event shall Azbil Corporation be liable to anyone for any indirect,
special or consequential damages. is information and specications
in this document are subject to change without notice.

Model JTD720A - Smart Multivariable Transmitter i
Safety
Safety instructions
Preface
Correct installation and periodic maintenance are essential to the safe use of your
dierential pressure transmitters.
Read the safety instructions provided in this manual carefully and understand them
fully before starting installation, operation, and maintenance work.
Inspection
On delivery, make sure that the specications are correct and check for any damage
that may have occurred during transportation. This equipment was tested under a
strict quality control program before shipment. If you nd any problem in the quality
specications, please contact an Azbil Corporation representative immediately,
providing the model name and serial number.
The name plate is mounted on the top of the enclosure.
Precautions
The following symbols are used in this manual to ensure user safety.
WARNING
Denotes a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION
Denotes a potentially hazardous situation which, if not avoided, could result in
operator minor injury or damage to device.

Safety Azbil Corporation
ii Model JTD720A - Smart Multivariable Transmitter
Safety messages
Installation
WARNING
• When installing the transmitter, ensure that the transmitters gaskets do not
protrude from the process connection parts, such as anges contacting the
process pipes.
• Never use the transmitter in applications that are outside the rated pressure or
temperature range. Always observe connection specications. Damage to the
transmitter, or leakage, may endanger plant, equipment or human safety.
• In areas designated as explosion-proof, apply to any cabling work the methods
specied in the explosion-proong guidelines.
CAUTION
• After installation, do not step on the transmitter as this may damage it, or
cause physical injury.
• The glass indicator may break if hit with a tool or other object, and cause
physical injury.
• Install the transmitter correctly. Incorrect installation may lead to output
errors or violate applicable regulations.
• This transmitter is heavy. During installation, please ensure that your footing
is safe, and always wear safety shoes.
Electrical wiring
WARNING
To avoid electric shocks, dry hands completely before performing wiring work
and turning the power OFF. Wear gloves over dry hands.
CAUTION
• Before startup, study the specications carefully and ensure that the wiring is
correct. Wiring errors may cause hardware damage or other malfunctions.
• Provide a power supply that matches the specications of the transmitter.
Incorrect power supply may cause hardware damage.

Azbil Corporation Safety
Model JTD720A - Smart Multivariable Transmitter iii
Maintenance
WARNING
• Before disconnecting the transmitter from the process for any reason
including maintenance, wait for safe levels in residual pressure, uid or gas.
Extreme caution should be taken to avoid uid eruption.
• Prevent burns. Check venting or draining direction, and keep plant personnel
out of the way of vented gas or drained uid.
• When operational, never open the cover in an explosion-proof area. Avoid
explosions or other combustion accidents.
CAUTION
Strict product controls were exercised during the manufacture of this transmitter.
Never modify the transmitter in any way. In-plant modications may result in
damage to the transmitter or to property and human safety.
Communication equipment
CAUTION
Avoid use of communication equipment near this transmitter. Interference from
such equipment as a transceiver, a cellular phone, a PHS, a beeper may result
in malfunction (at some transmission frequencies). In any case, observe the
following precautions:
Check in advance of using any such equipment, the clearance required to ensure
safe operation of the transmitter. When using communications equipment, always
maintain a distance at least equal to this distance, between the communication
equipment and the transmitter.
Close transmitter cover before using communication equipment.

Safety Azbil Corporation
iv Model JTD720A - Smart Multivariable Transmitter
Unpacking, Checking, and Storage
Unpacking the transmitter
This transmitter is precision equipment. Handle it carefully to prevent an accident and
damage.
Checking accessories
In the package you receive from Azbil Corporation or our representative, is included
the main unit of a transmitter and the following accessories:
• One 3-inch, L-shaped wrench
Checking specications
The specications are marked on the transmitter nameplate. The specications on this
nameplate should agree exactly with your order. Especially, check the following:
• Tag No. (TAG No.)
• Model No. (MODEL)
• Production No. (PROD No.)
• Low and high limits of set range (RANGE)
• Supply voltage (SUPPLY)
• Explosion-proong conformance (mark is applicable only to explosion-proof
model)
Inquiry
Direct any inquiries about this transmitter to out nearest branch oce or
representative.
When making an inquiry, have handy a copy of the details marked on the nameplate:
• Model No. (MODEL)
• Production No. (PROD No.)
Storage
Storage over long periods requires special procedures, to avoid damage to this
instrument. Always store the transmitter:
• Indoors and at normal temperature and humidity.
• In a location subject to minimum vibrations and shocks.
• Before unpacking, not after.

Azbil Corporation Safety
Model JTD720A - Smart Multivariable Transmitter v
Precautions regarding NEPSI explosion protection
The installation, operation and maintenance of the product must comply with the
product specication and the following relevant standards and specications.
GB3836.13-2013: Explosive atmospheres―Part 13:Equipment repair, overhaul and
reclamation
GB3836.15-2017: Electrical apparatus for explosive gas atmospheres Part15:
Electrical installations in hazardous area (other than mines)
GB3836.16-2017: Electrical apparatus for explosive gas atmospheres―Part 16:
Inspection and maintenance of electrical installation (other than
mines)
GB50257-2014 : Code for construction and acceptance of electric equipment on re
and explosion hazard electric equipment installation engineering
Handling precautions
For use in hazardous areas, a cable gland that complies with GB3836.1-2010 and
GB3836.2-2010 and that has been certied by NEPSI as Ex d IIC must be used for
the conduit opening.

Table of Contents
Chapter 1 : Functions, Congurations, and Structures of
model JTD720A and communicator
1-1 : Function and Conguration.............................................................................. 1-1
1-2 : Digital indicator (optional) ................................................................................ 1-2
Main display .................................................................................................... 1-2
Sub display...................................................................................................... 1-3
1-3 : General information and procedures for conguration..................................... 1-5
1-4 : Field Communication Software model CFS100 Functionality and Conguration1-6
1-4-1 : Introduction .......................................................................................... 1-6
1-4-2 : Precautions .......................................................................................... 1-6
1-4-3 : Conguration of Model CFS100 and Peripheral Devices .................... 1-6
1-4-4 : Usage Environment.............................................................................. 1-7
1-4-5 : Conditions for Connected Devices....................................................... 1-7
Chapter 2 : Installation
2-1 : Installation environment ................................................................................... 2-1
2-1-1 : General environmental conditions........................................................ 2-1
Introduction....................................................................................... 2-1
Environmental conditions.................................................................. 2-1
2-1-2 : Environmental conditions for TIIS explosion-proof transmitter............. 2-2
TIIS Explosion-proof transmitter installation precautions.................. 2-2
Special condition for safe use (for NEPSI ameproof) ..................... 2-2
Environmental conditions for ameproof, special explosion-proof
transmitter......................................................................................... 2-2
Reference document ........................................................................ 2-3
2-1-3 : Installing the transmitter....................................................................... 2-4
Before you install the transmitter ...................................................... 2-4
2-1-4 : Transmitter main unit installation position............................................ 2-5
2-2 : Piping ............................................................................................................... 2-6
2-2-1 : Piping considerations........................................................................... 2-6
Introduction....................................................................................... 2-6
3-way method valve (option)............................................................. 2-6
Extension pipe (option)..................................................................... 2-6
High-pressure marking ..................................................................... 2-7
Pipe selection ................................................................................... 2-7
Materials and requirement................................................................ 2-7
Piping for liquid gas or steam ow rate measurement...................... 2-8
2-3 : Electrical wiring .............................................................................................. 2-11
2-3-1 : Wiring for general-use model............................................................. 2-11
Introduction..................................................................................... 2-11
Wiring.............................................................................................. 2-11

Table of Contents
Conduit pipe.................................................................................... 2-12
Grounding....................................................................................... 2-12
Supply power.................................................................................. 2-12
2-3-2 : Wiring for explosion-proof model ....................................................... 2-14
2-4 : Changing process connection port position ................................................... 2-15
2-4-1 : Changing the vertical position of the process connection port........... 2-15
Chapter 3 : Starting and Stopping this Device
3-1 : Operation Preparation...................................................................................... 3-2
3-1-1 : Communicator Connection................................................................... 3-2
3-2 : Tag Number Conguration and Checking various settings.............................. 3-3
3-2-1 : Tag Number Conguration................................................................... 3-3
3-2-2 : Output Format Conguration................................................................ 3-4
3-2-3 : Checking or setting the indicator display unit....................................... 3-4
3-2-4 : Checking or setting the lower and upper limits of indicator ................. 3-6
3-2-5 : Damping Time Constant Conguration................................................ 3-7
3-2-6 : Checking or setting the design pressure.............................................. 3-8
3-2-7 : Checking or setting the design temperatue ......................................... 3-8
3-2-8 : Setting the temperature-pressure correction........................................ 3-9
3-2-9 : Checking or setting the static pressure elevation .............................. 3-10
3-3 : Measurement ................................................................................................ 3-11
3-3-1 : Flow Rate Measurement.................................................................... 3-11
Chapter 4 : Instrument maintenance and troubleshooting
4-1 : Assembly and Disassembly of this Device ...................................................... 4-1
4-1-1 : Cautions During Assembly and Disassembly ...................................... 4-1
4-1-2 : Attaching and Detaching the Case Cover............................................ 4-2
4-1-3 : Attaching and Detaching the Main Unit Cover .................................... 4-3
4-1-4 : Cleaning the Device............................................................................. 4-4
4-2 : Calibration of the Setting Range and Output Signal ........................................ 4-5
4-2-1 : Setting Range Calibration Using a Reference Input Device ................ 4-5
4-2-2 : Calibrating the di󰀨ernetial pressure sensor.......................................... 4-7
4-2-3 : Calibrating the static pressure sensor................................................ 4-10
4-2-4 : Calibrating a temperature sensor....................................................... 4-12
4-3 : Output Signal Calibration ............................................................................... 4-13
4-4 : Troubleshooting ............................................................................................. 4-14
4-4-1 : Checking this instrument.................................................................... 4-14
4-4-2 : Checking Self-diagnostic Messages .................................................. 4-15
4-4-3 : Status Message ................................................................................. 4-16

List of Figures & Tables
Figures
Figure 1-1 Digital indicator .................................................................................................... 1-1
Figure 2-1 Name plate and conformance mark ....................................................................... 2-3
Figure 2-2 Installing the transmitter ....................................................................................... 2-4
Figure 2-3 Equipment for line mounting ................................................................................ 2-4
Figure 2-4 3-way manifold valve (Model MVG1) ................................................................. 2-7
Figure 2-5 Extension pipe ....................................................................................................... 2-7
Figure 2-6 High pressure marking on center body ................................................................. 2-8
Figure 2-7 Piping for gas or liquid ow rate measurement .................................................... 2-9
Figure 2-8 Pipe for gas or liquid ow measurement ............................................................. 2-10
Figure 2-9 Piping for steam ow measurement .................................................................... 2-11
Figure 2-10 Wiring ............................................................................................................... 2-12
Figure 2-11 Supply voltage and load resistance characteristics ........................................... 2-13
Figure 2-12 Connecting SFC ................................................................................................ 2-14
Figure 3-1 .............................................................................................................................. 3-5
Figure 3-2 Items displayed on LCD ........................................................................................ 3-8
Figure 3-3 Flowchart of conguration data entry ................................................................... 3-9
Tables
Table 1-1 Operation modes of transmitter .............................................................................. 1-5
Table 4-1 Cover Bolt and Nut Tightening Torques (N·m) ..................................................... 4-3
Table 4-2 Troubleshooting .................................................................................................... 4-14

Azbil Corporation Functions, Congurations, and Structures of model JTD720A and communicator
Model JTD720A - Smart Multivariable Transmitter 1-1
Chapter 1 : Functions, Congurations,
and Structures of model
JTD720A and communicator
1-1 : Function and Conguration
The dierential pressure transmitter with temperature/pressure compensation, model
JTD 720A, is designed for gas ow measurement.
Temperature sensor
(RTD)
Air
Mass ow
(output after temperature and
pressure compensation)
JTD720A
• Dierential pressure / pressure
measurement
• Saturated steam compensation
Figure 1-1 Instrumentation example of the transmitter with temperature/pressure
compensation
This transmitter simultaneously measures the process dierential pressure, static
pressure, and temperature, and compensates for changes in density due to static
pressure uctuation and temperature uctuation, as shown in the block diagram in
gure 1-1. After compensation, it transmits an output proportional to the mass ow
(the volumetric ow in Nm3 / unit of time under standard conditions).
In addition, various settings of the transmitter (dierential pressure range, design
pressure, design temperature, square root output, damping time constant, etc.) can be
specied using the communicator.
Mass ow
(output after temperature and
pressure compensation)
JTD720A
• Dierential pressure / pressure measurement
• Saturated steam compensation
Saturated steam
Figure 1-2 Instrumentation example of the transmitter with temperature/pressure
compensation (saturated steam compensation)
Dierential pressure DP
Static pressure PP Static pressure Design temperature
TemperatureDesign pressure
Temperature PT
DP–LRV
For linear
For square root extraction
Damping output
URV–LRV
× ×
√
Figure 1-3 Block diagram of calculation by transmitter with temperature/pressure compensation

Functions, Congurations, and Structures of model JTD720A and communicator Azbil Corporation
1-2 Model JTD720A - Smart Multivariable Transmitter
×
Dierential pressure DP Density calculated from static pressure
Density calculated from design pressure
Static pressure PP
DP–LRV
URV–LRV
Figure 1-4 Block diagram of calculation by transmitter with temperature/pressure
compensation (for saturated steam)
LRV: Lower limit of the dierential pressure to output 0 % (4 mA DC)
URV: Upper limit of the dierential pressure to output 100 % (20 mA DC)
1-2 : Digital indicator (optional)
The display unit of a digital indicator consists of the following:
Main display
Sub display
%
DH
kg/
aG-C
00
ST
-0.00MP1@
Figure 1-5 Digital indicator
Main display
The main display shows an output of a transmitter in % .
The indications in a measurement mode and in a calibration mode are as follows:
Measurement mode
Compensated output is displayed in % or engineering unit.
Calibration mode
DP mode: Displays 0 to 100% of setting DP range
PP mode: Displays 0 to 100% of setting PP range
PT mode: Displays 0 to 100% of setting PT range
OUTPUT mode
Displays the output set as constant current in %.
At DSP , the value of which it extracts the square root is displayed.
Example: When the output is set to 50%
LIN: 50.00%
DSP : 70.71%
OUT : 50.00%

Azbil Corporation Functions, Congurations, and Structures of model JTD720A and communicator
Model JTD720A - Smart Multivariable Transmitter 1-3
INPUT mode:
When the simulated value (DP,PP,TP) is input, displays the compensated output in %
or engineering unit.
Sub display
Measurement mode
Displays the liner/square root , engineering unit, process pressure, and process
temperature(only connected with RTD).
It has three display modes.
LIN: Both output and display is linear
DSP : Output is linear, display is square root(Flow rate)
OUT : Both output and display is square root(Flow rate)
~Note • When the saturated steam compensation (Options code:F2) is selected,
@ is displayed in the right of °C. It is shown that it is calculated based
on the vapor pressure in piping. So when steam doesn't ow, about
100°C is displayed under the atmospheric pressure condition .
• % ↔scale engineering unit scale, LIN or OUT ↔DSP cannot
be switched.
Calibration mode
Dierential pressure, static pressure or process temperature is displayed according to
the mode. The mode is displayed on the lower column.
DP mode:
2 . 6 7 kP a
D P M O D E
• Displays present dierential pressure in kPa.
PP mode:
1 . 4 1 M P a
P P M O D E
• Displays present static pressure in MPa (gauge pressure).
PT mode:
25.0D e gC
PTM O D E
• Displays present process temperature in °C.

Functions, Congurations, and Structures of model JTD720A and communicator Azbil Corporation
1-4 Model JTD720A - Smart Multivariable Transmitter
OUTPUT mode
D S P N m 3 / H
L O O P T E ST
• Displays “LOOP TEST”.
INPUT mode:
D S P N m 3 / H
INP U T M O D E
• Displays “INPUT MODE”.

Azbil Corporation Functions, Congurations, and Structures of model JTD720A and communicator
Model JTD720A - Smart Multivariable Transmitter 1-5
1-3 : General information and procedures for
conguration
The model JTD720 Dierential Pressure Transmitter has six operation modes:
MEASURE mode, DP mode, PP mode, PT mode, INPUT mode, and OUTPUT
mode, as shown in Table 1-1. The DP, PP, PT modes are collectively referred to as
CALIBRATION mode:
Table 1-1 Operation modes of transmitter
Mode Description
MEASURE
mode
The transmitter delivers an output signal which has been
corrected for static pressure and temperature. Normally, the
transmitter is run in this mode.
CALIBRATION mode
DP mode The transmitter delivers an output current signal corresponding to
the dierential pressure input signal (4 mA (0%) for DP-LRV and
20 mA (100%) for DP-URV). This mode is used also for setting
and calibration of the dierential pressure sensor (setting and
calibration of DP-LRV nad DP-URV).*1
PP mode The transmitter delivers and output current signal corresponding
to the static pressure input signal (4 mA (0%) for PP-LRV and 20
mA (100%) for PP-URV). This mode is used also for setting and
calibration of the static pressure sensor (setting and calibration of
PP-LRV and PP-URV).*1
PT mode The transmitter delivers and output current siganal corresponding
to the temperature input signal (4 mA (0%) for PT-LRV and 20
mA (100%) for PT-URV). This mode is used also for setting and
calibration of the temperature sensor (setting and calibration of
PT-LRV nad PT-URV).*1
INPUT mode The transmitter accepts simulated dierential pressure, static
pressure and temperature signals, and delivers an output signal
that has been corrected for static pressure and temperature.
OUTPUT mode The transmitter acts as a constant-current signal source. This
mode is also used for calibration of the D/A converter
~Note *1: Forcalibration,useasucientlyaccurateinputsignal.Ifyou
attemptzerocalivrationwithavaluemorethan3%ofURV(the
maximumvalueforthemeasuringrangeofthesensor)orspan
calibrationwithavaluemorethan3%ofthespanthatexistedbefore
calibration,thetransmittermayexhibitsymptomssimilartothose
exhibitedbyatransmitterexperiencinganon-criticalerror.

Functions, Congurations, and Structures of model JTD720A and communicator Azbil Corporation
1-6 Model JTD720A - Smart Multivariable Transmitter
1-4 : Field Communication Software model CFS100
Functionality and Conguration
1-4-1 : Introduction
Model CFS100 is a conguration tool which communicates with Azbil smart devices
and performs the various device conguration operations. With Model CFS100,
communication is carried out by connecting a communication interface to a USB port of
a PC, and connecting a communication cable to a communication terminal of an Azbil
smart device.
SFN/DE communication and HART communication use their own respective special-
purpose communication interfaces.
1-4-2 : Precautions
* Precautions when changing the connected device
While displaying dynamic values such as pressure, Model CFS100 continues
to communicate with the device in order to update these dynamic values. If the
communication cable is disconnected from the device in order to change the
connected device, a communication error will occur in Model CFS100. Consequently,
in order to avoid this communication error, terminate Model CFS100 before
disconnecting the communication cable from the device, and restart Model CFS100
after connecting the communication cable to the new device.
* Do not use with the PC connected to an AC power supply.
* Do not connect the communication interface before installing the Model CFS100
software on the
PC. It will not be able to operate normally because the driver will not be found.
1-4-3 : Conguration of Model CFS100 and Peripheral Devices
The conguration of Model CFS100 is as follows.

Azbil Corporation Functions, Congurations, and Structures of model JTD720A and communicator
Model JTD720A - Smart Multivariable Transmitter 1-7
1-4-4 : Usage Environment
The usage environment of the communication interface (CFS100 SFN DE) is as
shown below.
Operating temperature: 0 - 50 °C
Operating humidity: 5 - 95 %
However, if the environmental conditions of the PC being used are stricter than the
conditions above, use the interface within the usage condition range of the PC.
1-4-5 : Conditions for Connected Devices
(1) PC
Check the Model CFS100 General Operation Manual.
Field Communication Software Model CFS100 User’s Manual: CM2-
CFS100-2001
(2) Communication Interface
Use a communication module that meets the following conditions.
SFN/DE communication
interface
CFS100 SFN DE
Azbil product model number
• 80345962-001 (alligator clip type)
• 80345962-002 (easy hook type)

Functions, Congurations, and Structures of model JTD720A and communicator Azbil Corporation
1-8 Model JTD720A - Smart Multivariable Transmitter

Model JTD720A - Smart Multivariable Transmitter 2-1
Chapter 2 : Installation
Overview of chapter 2
Instructions for the installation of pipes and cables associated with this transmitter.
Also covers installation of the transmitter. For users that are responsible for
installation work.
2-1 : Installation environment
2-1-1 : General environmental conditions
Introduction
Install under environmental conditions specied here, to fully exploit transmitter
performance over long periods.
Always install an explosion-proof transmitter where regulations demand such
precautions.
When installing explosion-proof models, follow the guidelines in Recommended
Practices for Explosion-Protected Electrical Installations in General Industries
(2006, for gases and vapors) or Users’ Guidelines for Installations for Explosive
Atmospheres in General Industry, which are technical recommendations from the
National Institute of Occupational Safety and Health.
Environmental conditions
Select a location to meet the following conditions:
• Temperature uctuations should be as small as possible
• Avoid installing in locations that are exposed to radiated heat from other plant
equipment.
• Insulate against freezing in the measured uid or sealing liquid.
• Select a location where shocks and vibrations are as small as possible.
• Avoid installing in corrosive atmospheres.
• External zero-adjustment function is an option that may be subject to output
uctuations if installed near to sources of strong magnetic interference. Install
such models at least 1 m remote from plant equipment producing strong magnetic
interference as over 10 gauss measured where a motor or a pump is installed.

Installation Azbil Corporation
2-2 Model JTD720A - Smart Multivariable Transmitter
2-1-2 : Environmental conditions for TIIS explosion-proof
transmitter
TIIS Explosion-proof transmitter installation precautions
TIIS Explosion-proof transmitters have passed inspections at a public organization
in compliance with Japanese Labor Safety and Hygiene Laws. As specied, use
explosion-proof transmitters in hazardous locations. Smart Transmitters are available
in two types of explosion-proof specications: ameproof, special explosion-proof
specications and intrinsically-safe specications.
Explosion-proof transmitters have a conformance mark that provides required
information for explosion-proof performance. Install explosion-proof transmitters
correctly, and follow the information on the name plate.
Special condition for safe use (for NEPSI ameproof)
- The terminal cover has at least 9 engaged threads.
- The cover (with or without window) has at least 9 engaged threads.
- The housing has at least 10.5 engaged threads.
Environmental conditions for ameproof, special
explosion-proof transmitter
Install a ameproof, special explosion-proof transmitter in locations that meet the
following explosion class, ignition temperature, and hazardous environment class
conditions:
• Explosion class and ignition temperature of gas:
IIB + H2T4 (IIB + H2T4: Gas equivalent to IIC, steam and Hydrogen
T4: Gas and steam whose ignition temperature is 135°C or higher.)
• Hazardous area classication:
Hazardous Zones 1 and 2
Do not install this device in Zone 0.
• Temperature
Select a location where the temperature always stays under high limits specied by
the conformance mark. AMBIENT TEMP refers to the ambient temperature of the
transmitter and METER BODY TEMP refers to the temperature of the meter body
that is in contact with the liquid. The low limit is -15°C for both ambient temperature
and meter body temperature.