Azbil MagneW Two-wire PLUS+ MTG15A User manual

CM2-MTG400-2001
MagneWTM Two-wire PLUS+
Two-wire Electromagnetic Flowmeter
TIIS/KCs Explosion-protected Apparatus
Model MTG15A
User's Manual

NOTICE
While the information in this manual is presented in good faith and
believed to be accurate, Azbil Corporation disclaims any implied
warranty of merchantability or fitness for a particular purpose and
makes no express warranty 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.
© 2010-2020 Azbil Corporation. All Rights Reserved.

Safety
Precautions for Use
For safe use of the product, the following symbols are used in this manual.
WARNING Warnings are indicated when mishandling the product might
result in the death or serious injury of the user.
CAUTION Cautions are indicated when mishandling the product might
result in minor injury to the user or damage to property.
In describing the product, this manual uses the icons and conventions listed below.
Use caution when handling the product.
The indicated action is prohibited.
Be sure to follow the indicated instructions.
Handling Precautions:
Handling Precautions indicate items that the user should pay attention to when
handling the ATT.
To use this product correctly and safely, always observe the following precautions.
We are not responsible for damage or injury caused by the use of the product in violation of
these precautions.
Handling Precautions for This Product
Installation Precautions
WARNING
When installing, use proper fittings and proper tightening torque for connections to the
process and to the exhaust. Gas leakage is dangerous because process gas and calibration
gas are flammable. Please refer to the leak check instructions in this manual and verify
that there is no gas leakage.
Do not use the product except at the rated pressure, specified connection standards, and
rated temperature. Use under other circumstances might cause damage that leads to a
serious accident.
For wiring work in an explosion-proof area, follow the work method stated in the
explosion-proof policy.
i

ii
CAUTION
After installation, do not step or stand on this unit. Doing so may damage the device or
cause injury.
Bumping the glass of the display with a tool may cause damage or injury. Be careful.
Install the device correctly. Incorrect or incomplete installation will cause output errors
and violation of regulations.
This product is quite heavy. Protect your feet with safety shoes when working.
Do not subject the product to shock or impact.
Wiring Precautions
WARNING
Do not do wiring work with wet hands or while electricity is being supplied to the product.
There is a danger of electric shock. When working, keep hands dry or wear gloves, and
turn off the power.
CAUTION
When wiring, check the specifications carefully and make sure to wire correctly. Incorrect
wiring can cause device damage or malfunction.
Supply electric power correctly according to the specifications. Supplying power that
differs from the specifications can damage the device.
Use a DC power supply that has overload protection.
Maintenance Precautions
WARNING
When removing this device for maintenance, be careful of residual pressure or residual
process gas. Leakage of process gas is dangerous.
When working on the vent, check its direction so that people do not come into contact
with vented gas. There is a danger of burns or other physical harm.
When the device is being used in an explosion-proof area, do not open the cover.
Opening the cover may cause an explosion.
CAUTION
This product was kept under carefully controlled conditions until it was shipped. Never try
to modify this device. Doing so could damage it.

iii
Table of Contents
Chapter 1. Measuring configuration system and model MTG structure . . . . . . . . . . .1-1
1-1. System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-2. TIIS/KOSHA Explosion-protected apparatus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-3. Structure of this instrument and functions of its various parts . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Chapter 2. Installing the model MTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2-1. Before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-2. Method of Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2-2-1. Installing a safer type detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2-2-2. Installation a flange type detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Chapter 3. Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3-1. Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Chapter 4. Start and stop operation procedure for model MTG . . . . . . . . . . . . . . . . . . .4-1
4-1. Confirmation before start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4-2. Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Chapter 5. Operation using the data setting device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
5-1. Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5-2. Functions of the data setting device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5-2-1. Data setting device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
5-3. Description of MEASURING MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5-3-1. Display overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5-3-2. Display of write protect level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5-4. Overview of operation using the data setting device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
5-5. Configuration of OPERATOR'S MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11
5-5-1. Changing setting of damping time constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-13
5-5-2. Auto zero adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5-5-3. Setting of built-in counter reset value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
5-5-4. Setting of built-in counter reset value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
5-5-5. Setting auto spike cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
5-5-6. Setting moving average processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
5-5-7. Setting Electrode Status Diagnostic function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20
5-5-8. Selecting flow rate to be displayed in the main display . . . . . . . . . . . . . . . . . . . . . . . . .5-31
5-5-9. Selecting a communication system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32
5-5-10. Entering ENGINEERING MODE and MAINTENANCE MODE . . . . . . . . . . . . . . . . . . . . .5-33

iv
5-6. Configuration of ENGINEERING MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35
5-6-1. Setting ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38
5-6-2. Selecting Pulse Output, Electrode Status Output or High Low Status Output . . . .5-39
5-6-3. Setting detector information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-40
5-6-4. Setting detector factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-41
5-6-5. Setting flow rate range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-42
5-6-6. Setting and changing compensation coefficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-43
5-6-7. Setting specific gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-44
5-6-8. Setting pulse scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-45
5-6-9. Setting pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-47
5-6-10. Setting drop out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-50
5-6-11. Setting low flow cutoff. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-52
5-6-12. Setting upper and lower limit alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-53
5-6-13. Selecting failsafe mode for analog outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-54
5-6-14. Selecting failsafe mode for pulse output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-55
5-6-15. Setting contact output status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-56
5-7. Configuration of MAINTENANCE MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-57
5-7-1. Configuration of OUTPUT CHECK MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-58
5-7-2. Performing Loop Checks of Analog Outputs by using a calibrator Model MGZ. . . 5-60
5-7-3. Performing loop checks of analog outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-61
5-7-4. Performing loop checks of pulse outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-62
5-7-5. Performing loop checks of contact outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-63
5-7-6. Configuration of CALIBRATION MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-64
5-7-7. Manual zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-67
5-7-8. Configuration of CRITICAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-69
5-7-9. Displaying ROM version and date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-70
5-7-10. Returning to settings at shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-71
5-8. Description of Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-72
Chapter 6. Operation using SFC communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6-1. Structure and functions of SFC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6-1-1. Structure of SFC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6-1-2. Functions of SFC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
6-1-3. SFC Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
6-1-4. SFC unavailable functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
6-1-5. Before operating SFC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
6-2. Configuration using SFC communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
6-2-1. Before communicating using the SFC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
6-2-2. Setting using SFC communication (1) - setting using key assigned functions . . . .6-19
6-2-3. Setting using SFC communication (2) - setting using CONFIG functions . . . . . . . . . 6-42
Chapter 7. Operation using HART communicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7-1. Preparation for communication, verification and cautions on use . . . . . . . . . . . . . . . . . . . . . . 7-1
7-1-1. Wiring between converter and HART Communicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7-1-2. Two wired magflow meter converter setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
7-1-3. Verifying communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
7-1-4. Cautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
7-2. Setting and calibrating devices using the HART Communicator . . . . . . . . . . . . . . . . . . . . . . . . 7-4
7-2-1. Setting procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
7-2-2. Setting converter data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12
7-2-3. Signal processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
7-2-4. Pulse setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18
7-2-5. Totalized value setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20
7-2-6. Contact output setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22
7-2-7. Burnout setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-24

v
7-3. Calibrating and Inspecting the device by HART Communicator and other functions. . . . 7-25
7-3-1. Device adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25
7-3-2. Output check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-33
7-3-3. Other functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-37
7-4. Short cut commands and menus for HART communicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-40
7-4-1. Short cut keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-40
7-4-2. Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-41
Chapter 8. Maintenance and troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8-1. Maintenance and inspection of hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8-2. Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

vi

1-1
Chapter 1. Measuring configuration system and model
MTG structure
Outline of this chapter
This chapter presents the equipment configuration of a measuring system using this
instrument.
It also describes the structure and the names and functions of various parts of the main unit.

1-2
1-1. System configuration
Measuring system
Introduction
This instrument is a two-wire electromagnetic flowmeter operated on 4-20mA DC. It
measures the flow rate of conductive fluid flowing in the detector and outputs a signal that is
suitable for the measuring range.
Concept of flow rate measurement by this instrument
The concept of a flow rate measuring system using this instrument is shown.
Fluid
Output
signal
Analog output
Pulse output
De output
Contact output
Fig. 1-1. Conceptual drawing of measuring system (integral type)
Analog output
If instantaneous flow rate values are to be output as an analog variable to control equipment,
configure the system to output an analog output.
Digital output (DE output)
Use this system configuration if instantaneous flow rate values, instrument database and self-
diagnosis results are to be outputted as digital variables (DE outputs) to control equipment.
Pulse output
As a pulse output, the open-collector output is available. Pulse frequencies up to 200 Hz can be
outputted. The pulse output can be outputted simultaneously with an analog output.
If integrated flow values are to outputted as a pulse to control equipment, wire an another two-
wire to output a pulse output.
Contact output
Instead of the pulse output, a contact output the open-collector output is available. The
contact output can be outputted simultaneously with an analog output.

1-3
System configuration 1 for analog output
System configuration
An example of system configuration is shown. The instantaneous flow rate values measured by
this instrument are outputted as a 4-20mA DC analog signal.
In this system configuration, the analog signal from the instrument can be outputted directly
to a host control system.
Communicator
+
-
+
SFC / HART Communicator
4-20mA
analog signal
250
resistance
24 V DC power
Host
control
system
(1-5 V
input)
-
-
+
Non-hazardous areaHazardous area
Fig. 1-2. System configuration for analog output
Smart two-wire electromagnetic flowmeter (main unit): Measures flow rate and outputs
instantaneous flow rate value as an analog signal.
Communicator: Used to communicate with this instrument, read data and change the
instrument data settings.
Note) To use the SFC, read “Chapter 6. Operation using SFC communicator” in this manual.
To use the HART communicator, read “Chapter 7. Operation using HART
communicator” in this manual.
Compatible with the SFC of Ver 7.0 or over. However, some functions on the main unit
cannot be set.
For DD (device description) of the HART® Communicator, use the HCF DD Library Host
DD Distribution (HCF-KIT-III) Release 2010 Number 1, Device Description 1, Device
Revision 2 or later.
This instrument can communicate on two protocols: Smart Field Communication (SFC)
and HART® communication (HART® communicator). The communication method to be
used is selected by the (human) data setter.
When configuring a system using this instrument, it is necessary to determine the power
supply voltage and load resistance to satisfy the operation conditions of this instrument.
For details, refer to specification sheet (SS2-MTG300-0300).

1-4
System configuration for digital output (DE output)
System configuration
In the system configuration shown below, the flow rate measurements, database and self-
diagnosis results of this instrument are outputted on the DE (digital enhancement) protocol,
which is a communication protocol for digital signals.
In this system configuration, the instrument transmits digital signals on the DE protocol and
the smart protocol converter (SPC) converts the digital signals into analog signals, which is
outputted to a control system. It can also output the DE protocol based digital signals without
conversion to a control system.
Control
system
SPC
SHL
PM100,
PM300
or
A-MC
STIM
module
Communicator
Communicator
SFC
SFC
Non-hazardous areaHazardous area
Fig. 1-3. System configuration for digital output
Smart two-wire electromagnetic flowmeter (main unit): Measures flow rate and outputs
the instantaneous flow rate values and the instrument's self-diagnosis results as the form of
digital signals.
Smart protocol converter (SPC): Receives DE protocol based digital signals from this
instrument and converts them into a 4-20mA DC or 1-5 V DC analog signal and outputs it.
Smart handy loader: Used to change SPC settings data.
Communicator: Used to communicate with this instrument, read data and change the
instrument's settings data.
PM100, PM300, A-MC: These are process controllers on the UCN and do regulatory
control, sequences, arithmetic operations, process I/O and other functions simultaneously.
STIM module: This is an I/O module for smart transmitter interfaces to connect a process
manager (PM) to model MTG or other field equipment.

1-5
System configuration for pulse output
System configuration
An example of system configuration is shown. Instantaneous flow rate values measured by this
instrument are outputted as a pulse output with the specified pulse width and pulse weight.
Besides an analog signal, this system configuration allows the instrument to output a pulse
output to an electronic counter, sequencer or other host control system or counter.
Electronic counter
(Required opne-collector
based pulse input)
Non-hazardous areaHazardous area
Power
supply
*
Fig. 1-4. System configuration for pulse output
Note) *: Refer to Fig. 1-2.
Smart two-wire electromagnetic flowmeter (main unit): Measures flow rate and outputs a
pulse output signal to an electronic counter. Displays the measured flow rate as a flow rate
value.
Electronic counter: Receives the pulse input signal as input and displays the integrated
value and control the target equipment by batch control function.
Open collector: A pulse output method using a transistor contact.

1-6
System configuration for contact output
System configuration
An example of system configuration is shown. If the instantaneous flow rate value measured
by this instrument reaches to the upper or lower limit settings or a major failure occurs in the
instrument, that state is outputted as a contact output.
In this system configuration, it is not only an analog signal but also the instrument to output
the contact output to a sequencer or other host control system.
Non-hazardous areaHazardous area
Power
supply
*
Contact receiver instrument
(Required open-collector
based pulse input.)
Fig. 1-5. System configuration for contact output
Note) *: Refer to Fig. 1-2.
Smart two-wire electromagnetic flowmeter (main unit): Measures flow rate and outputs an
upper or lower limit alarm or major failure as a contact output.
Contact receive instrument: Receive the contact input.
Open collector: An output method using a transistor contact.

1-7
1-2. TIIS/KOSHA Explosion-protected apparatus
Before use
This is flameproof structure flowmeter. Read this item carefully to ensure correct use.
Flameproof structure
Flameproof structure means a totally enclosed housing that is capable of withstanding an
explosion of a gas or vapor within it, and of preventing the ignition of an explosive gas or
vapor that may surround it.
CAUTION
Before opening cover, you must turn off the power and wait for seven (7) minutes.
Location guidelines
Install the flowmeter in accordance with the following guidelines:
The flowmeter can be installed in hazardous areas of grade:
1 2
IIC T4
1. Explosive gaseous atmosphere graded IIC
2. Gaseous atmosphere where the ignition temperature is 135°C or greater
This means that the flowmeter can only be installed in Class I and II locations. It cannot be
installed in Class 0 locations.
When installing the flowmeter in a hazardous or non-hazardous area, refer to the
installation specifications described in the appendix for the correct wiring.
The pressure-resistant packing cable adapter must be placed in the signal wire outlet of the
flowmeter converter. Use the adapter supplied.
Handle the flowmeter case and cover carefully to prevent any damage or distortion.
Properly tighten the converter cover and never open it during operation.
The specified explosion capability cannot be guaranteed if any of the above guidelines are
ignored.
When wiring the flowmeter in a Class 1 Hazardous Area, or in any area where only low
voltage wiring work is allowed, follow procedures published by the Technology Institution of
Industrial Safety.
Fig. 1-6. Nameplate

1-8
Certificate number (TIIS/KOSHA)
Line size
[mm]
Flange
(Pipe material:
SCS14)
Flange
(Pipe material:
SUS304)
Wafer
(Pipe material:
SCS14)
Wafer
(Pipe material:
SUS304)
2.5 TC19022
12-AV4BO-0368 ---
5TC19022
12-AV4BO-0368 ---
10 TC19022
12-AV4BO-0368 ---
15 TC19022
12-AV4BO-0368 ---
25 - TC19028
12-AV4BO-0377
TC19023
12-AV4BO-0369
TC19028
12-AV4BO-0377
40 - TC19029
12-AV4BO-0378
TC19024
12-AV4BO-0370
TC19029
12-AV4BO-0378
50 - TC19031
12-AV4BO-0433
TC19025
12-AV4BO-0371
TC19031
12-AV4BO-0433
65 - TC19030
12-AV4BO-0379
TC19026
12-AV4BO-0372
TC19030
12-AV4BO-0379
80 - TC19032
12-AV4BO-0380
TC19027
12-AV4BO-0373
TC19032
12-AV4BO-0380
100 - TC19020
12-AV4BO-0374
TC19021
12-AV4BO-0381
TC19020
12-AV4BO-0374
150 - TC19033
12-AV4BO-0375 - -
200 - TC19034
12-AV4BO-0376 - -

1-9
1-3. Structure of this instrument and functions of its various parts
Structure of main unit
Major components
This instrument consists of a detector and converter. The converter, consists of the converter
proper, indicator/data setter and terminal box. Fig. 1-7. shows overview of the instrument.
(The detail specification and outline drawing, refer to SS2-MTG100-0100)
Set screw
Detector
Converter
Electrodes (internal)
Flame-proof
cable gland
Set screw
Indicator/data setter
Plug
Terminal box
Fig. 1-7. Overview of integral type
Names and description of various parts
The following table gives a description of the various parts.
Name Description
Detector
When a fluid passes through the inside, the detector generates a signal
of electromotive force that is proportional to the passing flow rate.
Connects to the pipes and supports the entire instrument.
As to the electrode position, both electrodes are installed in a
horizontal position.
Converter
Transmits the signal of electromotive force generated by the detector
into an instantaneous flow rate value and outputs it as a flow rate
signal.
Indicator/data
setter
Displays the instantaneous flow rate value and internal conditions of
the instrument.
Terminal box Contains output signal and grounding terminals.
Nameplate MODEL No., PRODUCT No. and detector constant (EX) are written.
TAG No. plate TAG No. is stamped according to the order specification.
Set screw Keep the cover tightened and ensure the flame-proof capability. Use the
device with set screw tightened.
Flame-proof
cable gland
Seal the cable to assure the flame-proof capability. Required for
explosion-proof instrumentation.

1-10
Detector 1: Flanged type
Description
The flanged detector has the function and structure as follows:
When a fluid passes through the inside, the detector generates a signal of electromotive
force, which is proportional to the passing flow rate.
Installs to the pipes and supports the entire instrument.
As to the electrode position, both electrodes are installed in a horizontal position.
Names of various parts
The structure and names of various parts of the detector are shown.
Flow direction mark
Grounding ring
Flange
Screw
(4 places)
Fig. 1-8. Detector details (Flanged detector)
Names and functions of various parts
The following table describes the various parts of the detector.
Name Description
Flow direction
mark
Indicates the flow direction of the fluid.
Mount the detector so that the measured fluid flows in the direction
indicated by this mark.
Grounding ring
Keep reference voltage as zero by grounding the unit. The grounding
ring material varies depending on the corrosion characteristics of the
measured fluid.
Screw
Fixes the detector to the converter.
When these screws are removed, the detector direction may be
changed with respect to the converter direction.
Flange The flanges depend on the flanges on the pipes to which to connect.

1-11
Detector 2: Wafer type
Description
The wafer type detector has a function and structure as follows:
When a fluid passes through the inside, the detector generates a signal of electromotive
force that is proportional to the passing flow rate.
As to the electrode position, both electrodes are installed in a horizontal position.
Names of various parts
The structure and names of various parts of the detector are shown.
Flow direction mark
Grounding ring
Screw
(4 places)
Fig. 1-9. Detector details (wafer-type detector)
Names and functions of various parts
The following table describes the various parts of the detector.
Name Description
Flow direction
mark
Indicates the flow direction of the fluid.
Mount the detector so that the measured fluid flows in the direction
indicated by this mark.
Grounding ring
Keep reference voltage as zero by grounding the unit. The grounding
ring material varies depending on the corrosion characteristics of the
measured fluid.

1-12
Indicator / data setter
Description
The indicator/data setter has the following function and structure.
Displays the instantaneous flow rate value and internal conditions of the instrument.
The indicator face can be turned at intervals of 90 degrees through one turn.
Names of various parts
The names of various parts of the indicator/data setter are shown.
Liquid crystal display
Screw
Fig. 1-10. Indicator/data setter details
Terminal box
Description
The terminal box contains output signal terminals.
Names of various parts
Fig. 1-11. shows the structure and names of various parts of the terminal box.
Terminal box cover
External grounding
terminal
Conduit for
an output
signal line
conduit
Internal grounding terminal
Fig. 1-11. Terminal box details