Azbil MagneW FLEX+ User manual

MagneW FLEX+/PLUS+
Electromagnetic Flowmeter
Explosion-proof type Detector
Model: MGG15/17
User's Manual
CM2-MGG120-2001

Copyright, Notices and Trademarks
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MagneW is a trademark of Azbil Corporation in Japan and/or other
countries.
© 1997–2019 Azbil Corporation. All Rights Reserved.

i
Preface Thank you for purchasing the MagneW FLEX+/PLUS+ Electromagnetic
Flowmeter. This product is a highly reliable, high performance
electromagnetic flowmeter developed based on our extensive experience in
the field.
The unique high-quality lining molding technique and many other special fea-
tures make this product deliver outstanding flow rate measurement.

ii
Unpacking and Inspection
Unpacking
the MagneW
FLEX+/PLUS+
This device is a precision instrument and should be handled with care to pre-
vent damage or breakage.
After unpacking the device, verify that the following items are included:
•The detector itself
•Standard accessories
•Precautions for Installation sheet
If you have any questions regarding the specifications of your MagneW FLEX+/PLUS+,
The specifications of this device are written on its attached identification
plate. Compare these specifications with those listed in the Appendix A,
"Device Standard Specifications and Model Numbers," and verify that all
specifications on the plate are correct, paying special attention to the follow-
ing:
• Detector bore diameter
• Electrode material
• Flange rating
• Grounding ring material
If you have any questions regarding the specifications of this device, contact
your nearest $]ELO&RUSRUDWLRQ office or $]ELO&RUSRUDWLRQ representative.
When making an enquiry, be sure to provide the model number and product
number of this device.
Verifying
specifications
Inquiries
When storing this device before use, observe these precautions:
• Store it indoors at room temperature and humidity, in a place safe from
vibration or shock.
• Store it in the same condition as it was shipped.
When storing this device after use, follow these steps:
1. Rinse the inside of the detector with water to eliminate residual fluids,
then allow to dry.
2. Firmly attach the terminal box cover and the electrode cover in order to
keep out moisture.
3. Replace the detector in its original packaging.
4. Store the device indoors at room temperature and humidity, in a place safe
from vibration or shock.
Storage
precautions

iii
Safety precautions in this manual are of two kinds —Warning and Caution.
The meaning of these flags is as follows:
Potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Failure to observe these precautions may produce
dangerous conditions that could result in injury to the
user or in physical damage.
Caution
Warning
Safety Precautions
Introduction Correct installation, correct operation and regular maintenance are essential to
ensure safety during the use of this device. Read and understand the safety
precautions described in this manual and be sure to follow the instructions on
installation, operation and maintenance.
Signal words

iv
How this Manual is Organized and Used
Organization and
method of use
This manual explains the use of the device and its associated devices in the
following order:
Chapter 1
The configuration of measuring systems using this product, the structure of
the detector, and the names and functions of the respective parts.
Chapter 2
Installation and wiring of the device. Persons installing this unit or the
pipes or wiring should refer to this chapter.
Chapter 3
Maintenance and inspection procedures and troubleshooting. Items which
require routine maintenance are explained here.

v
Detailed Table of Contents
Chapter 1 - Configuration and Structure of the Measuring
System ............................................................................. 1 - 1
Introduction ....................................................................... 1 - 1
1-1 System Configuration ....................................................... 1 - 2
Measuring System ............................................................ 1 - 2
1-2 Structure of this Unit and Functions of Parts .................... 1 - 3
Detector ............................................................................ 1 - 3
Detector Terminal Box ...................................................... 1 - 8
1-3 Use of Explosion-proof Electromagnetic Flowmeters
for TIIS .............................................................................. 1 - 9
1-4 Use of Explosion-proof Electromagnetic Flowmeters
for FM/CSA ....................................................................... 1 - 11
Chapter 2 - Installing the Device ....................................................... 2 - 1
Introduction ....................................................................... 2 - 1
2-1 Before Installing ................................................................ 2 - 2
Criteria for Selecting the Installation Site .......................... 2 - 3
Directions of the Terminal Box and the Converter ............ 2 - 6
2-2 Method of Installation........................................................ 2 - 8
2-2-1 Installing a Wafer Detector ............................................... 2 - 8
Basic Installation Method .................................................. 2 - 8
Parts Necessary for Installation ........................................ 2 - 11
Selecting an Installation Method ....................................... 2 - 13
Installation on a Pipe ........................................................ 2 - 14
2-2-2 Installing a Flanged Detector ............................................ 2 - 26
Basic Installation Method .................................................. 2 - 26
Parts Necessary for Installation ........................................ 2 - 32
Selecting an Installation Method ....................................... 2 - 33
Installation on a Pipe ........................................................ 2 - 34
Electrical Wiring ................................................................ 2 - 42
Chapter 3 - Maintenance of the Device............................................. 3 - 1
Introduction ....................................................................... 3 - 1
Index
Appendixes A
Standard Specifications and Model Numbers
External View of the Unit

vi
Figures and Tables
Figure 1-1 Integral Configuration ....................................................... 1 - 2
Figure 1-2 Remote Configuration ....................................................... 1 - 3
Figure 1-3 Details of the Detector ...................................................... 1 - 4
Figure 1-4 Details of the Wafer Detector ........................................... 1 - 6
Figure 1-5 Details of the Flanged Detector ........................................ 1 - 8
Figure 1-6 Detector Terminal Box ...................................................... 1 - 10
Figure 2-1 Proper Placement of the Detector .................................... 2 - 4
Figure 2-2 Straight Pipe Section on the Upstream Side of the
Detector ............................................................................ 2 - 4
Figure 2-3 Space Allowance for Inspections ...................................... 2 - 5
Figure 2-4 Repositioning the Terminal Box or Converter ................... 2 - 7
Figure 2-5 Device Installation Example ............................................. 2 - 8
Figure 2-6 Flange Shape ................................................................... 2 - 9
Figure 2-7 Examples of Unacceptable Installation (1) ....................... 2 - 10
Figure 2-8 Examples of Unacceptable Installation (2) ....................... 2 - 10
Figure 2-9 Horizontal Centering of the Detector ................................ 2 - 11
Figure 2-10 Vertical Centering of the Detector .................................... 2 - 11
Figure 2-11 Installation Using SUS Material Grounding Ring and Metal
Pipe................................................................................... 2 - 18
Figure 2-12 Installation Using Non-SUS Material Grounding Ring and
Metal Pipe ......................................................................... 2 - 20
Figure 2-13 Example of Incorrect Installation ...................................... 2 - 20
Figure 2-14 Installation Using SUS Material Grounding Ring .............. 2 - 22
Figure 2-15 Installation Using SUS Material Grounding Ring
(with protective plate)........................................................ 2 - 23
Figure 2-16 Installation Using SUS Material Grounding Ring
(with rubber gasket) .......................................................... 2 - 23
Figure 2-17 Installation Using the Grounding Ring of Non-SUS
Material ............................................................................. 2 - 24
Figure 2-18 Installation Using the Grounding Ring of Non-SUS Material
(with protective plate)........................................................ 2 - 25
Figure 2-19 Installation Using the Grounding Ring of Non-SUS Material
(with rubber gasket) .......................................................... 2 - 25
Figure 2-20 Installation Example ......................................................... 2 - 26
Figure 2-21 Flange Shape ................................................................... 2 - 30
Figure 2-22 Example of Incorrect Mounting ......................................... 2 - 31
Figure 2-23 Installation Using Grounding Rings of SUS Material ........ 2 - 34
Figure 2-24 Installation Using Grounding Ring Made of Non-SUS
Material ............................................................................. 2 - 36
Figure 2-25 Example of Incorrect Installation ...................................... 2 - 36
Figure 2-26 Installation Using SUS Material Grounding Ring .............. 2 - 38
Figure 2-27 Detector Installation Using SUS Material Grounding Ring
(with protective plate)........................................................ 2 - 39
Figure 2-28 Detector Installation Using SUS Material Grounding Ring
(with rubber gasket) .......................................................... 2 - 39
Figure 2-29 Detector Installation Using Non-SUS Material Grounding
Ring .................................................................................. 2 - 40
Figure 2-30 Detector Installation Using Non-SUS Material Grounding Ring
(with protective plate)........................................................ 2 - 41

vii
Figure 2-31 Detector Installation Using Non-SUS Material Grounding Ring
(with rubber gasket) .......................................................... 2 - 41
Figure 2-32 Connection Using a Special Cable ................................... 2 - 42
Figure 2-33 Grounding Via the External Grounding Terminal .............. 2 - 43
Figure 2-34 Example of Installation (union assembly) ......................... 2 - 44
Figure 2-35 Example of Installation...................................................... 2 - 45
Table 2-1 Fastening Torque Levels .................................................. 2 - 9
Table 2-2 Recommended Inner Diameters of Gaskets .................... 2 - 12
Table 2-3 Inner and Outside Diameters of Rubber Gaskets
(0.5 to 1 mm thick) ............................................................ 2 - 12
Table 2-4 Inner and Outside Diameters of Rubber Gaskets
(3 to 4 mm thick) ............................................................... 2 - 12
Table 2-5 Fastening Torque ............................................................. 2 - 27
Table 2-6 Recommended Inner Diameters of Gaskets .................... 2 - 32
Table 2-7 Fastening Torque ............................................................. 2 - 44

1 - 1
Chapter 1 - Configuration and Structure of
the Measuring System
Introduction This chapter explains the configuration of measuring systems using this unit.
• The structure of this unit and the names and functions of its respective parts
are explained.

1 - 2
Measuring System
1-1 System Configuration
Introduction Depending on how it is combined with the converter, this product is available in
two configurations, integral and remote.
• Remote: Detector and converter are installed connectly by cable.
Examples of flow
measurement
systems
Figures 1-1 show examples of measurement systems using the
device.
Figure 1-1 Integral Configuration
Converter
Detector
AC power supply
Pulse output
Contact input/output
Analog output
Digital output
Fluid
Excitation output
Flow signal input
Dedicated cable
Hazardous Area

1 - 3
1-2 Structure of this Unit and Functions of Parts
Detector
Explanation The functions and structure of the device are as follows.
• When a fluid passes through the detector, the detector generates an electro-
motive force signal proportional to the flow rate.
• The electrodes are both mounted horizontally.
Continued on next page
Names of major
parts of the wafer
type
Figure 1-2 shows the structure of the detector and the names of the major
parts.
Figure 1-2 Details of the Detector
Grounding
terminal
Terminal box
cover
Terminal
box
Electrode
cover
Mounting screw
(4 places)
Flow direction
mark
Grounding
ring
Pressure-resistant
packing cable
adapter
(only for TIIS)

1 - 4
Detector Continued
Names and func-
tions of parts
This table explains the major parts of the detector.
Name
Flow direction mark
Function
• Indicates the direction of fluid flow.
• Mount the detector so that the measured fluid flows
in the direction indicated by this mark.
Electrodes • The electrodes generate an electromotive force sig-
nal proportional to the flow rate of the fluid passing
through the detector.
• The electrode material varies depending on the cor-
rosion characteristics of the fluid to be measured.
Electrode cover • Houses the electrodes. Do not remove the cover
with the detector installed on a pipe.
Grounding ring • The electrode material varies according to the cor-
rosive characteristics of the fluid to be measured.
Also, the structure varies with the material.
Terminal box • Houses the connection terminals used to apply a
standard voltage.
• Houses excitation and signal terminals.
• To prevent the gas or liquid in the pipe from escaping do not re-
move the electrode cover or the electrodes when the detector is
installed on a pipe.
Warning
Terminal box cover
(remote model only)
• Keep the terminal box cover on during operation.
Pressure-resistant Pack-
ing Cable Adapter
• Seals the cable terminal to assure and enhance ex-
plosion-proof capability, insulation resistance and
mechanical strength. Required for any explosion-
proof instrumentation.

1 - 5
Detector Continued
Names of major
parts of the
flange type
Figure 1-3shows the structure of the detector and the names of its major parts.
Figure 1-3 Details of the Flanged Detector
Continued on next page
Grounding
terminal
Terminal box
cover
Terminal
box
Flow direction
mark
Flange
Grounding
ring
Electrode
cover
Mounting screw
(4 places)
Pressure-resistant
packing cable
adapter
(only for TIIS)

1 - 6
Detector Continued
Names and func-
tions of parts
This table explains the major parts of the detector.
Name
Flow direction mark
Function
• Indicates the direction of fluid flow.
• Mount the detector so that the measured fluid flows
in the direction indicated by this mark.
Electrodes • The electrodes generate an electromotive force sig-
nal proportional to the flow rate of the fluid passing
through the detector.
• The electrode material varies depending on the cor-
rosion characteristics of the fluid to be measured.
Electrode cover • Houses the electrodes. Do not remove the cover
with the detector installed on a pipe.
Grounding ring • The electrode material varies according to the cor-
rosive characteristics of the fluid to be measured.
Also, the structure varies with the material.
Terminal box • Houses the connection terminals used to apply a
standard voltage.
• Houses excitation and signal terminals.
• To prevent the gas or liquid in the pipe from escaping do not re-
move the electrode cover or the electrodes when the detector is
installed on a pipe.
Warning
Terminal box cover
(remote model only)
• Keep the terminal box cover on during operation.
Pressure-resistant Pack-
ing Cable Adapter
• Seals the cable terminal to assure and enhance ex-
plosion-proof capability, insulation resistance and
mechanical strength. Required for any explosion-
proof instrumentation.

1 - 7
Figure 1-4 Cable adapter with flameproof packing
Figure 1-5 Details of the cable adapter with flameproof packing

1 - 8
Detector Terminal Box
Names of parts Figure 1-6 Detector Terminal Box
Names and
explanations of
parts
The table below explains the major parts of the detector terminal box.
Name Explanation
Signal terminals • These are marked A, B, and C.
Excitation terminals • These are marked X and Y.
Conduit wiring connectors • The excitation cable and the signal cable are
wired through these connectors.
Grounding terminal • This terminal is used to ground the detector
(class 3 grounding).
• Turn off power to the converter side before wiring, to avoid electric
shock.
Warning
• Be sure to ground the detector without fail (class 3 grounding). In-
sufficient grounding could cause output fluctuation, instability of
the zero point, or output drift.
Caution
Excitation
terminals
Grounding
terminal
Signal
terminals
Conduit
wiring
connectors

1 - 9
Install the flowmeter in accordance with the following guidelines:
• The flowmeter can be installed in hazardous areas of grade:
IIC T4
1 2
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
Research Institute of Industrial Safety.
This flowmeter is of flameproof structure. Read this item carefully to ensure
correct use.
Before use
1.3 Use of Explosion-proof Electromagnetic Flowmeters
for TIIS
Flameproof
structure
Flameproof structure means a totally enclosed housing that is capable of with-
standing an explosion of a gas or vapor within it, and of preventing the igni-
tion of an explosive gas or vapor that may surround it.
Location guide-
lines

1 - 10
Nameplates The flowmeter is required to pass a certified examination conducted in accor-
dance with Industrial Safety and Hygiene Regulations. The Industry Safety
Engineering Association authorizes the flowmeter to carry a certified name-
plate only after passing the examination.
Figure 1.6 Certified Nameplate

1 - 11
1.4 Use of Explosion-proof Electromagnetic Flowmeters
for FM/CSA
Before use This flowmeter is of flame-proof (Explosion-protection) structure. Read this
item carefully to ensure correct use.
Flameproof structure means a totally enclosed housing that is capable of with-
standing an explosion of a gas or vapor within it, and of preventing the igni-
tion of an explosive gas or vapor that may surround it.
Flameproof
(Explosion-
protection)
structure
Location
guidelines
Install the flowmeter in accordance with the following guidelines:
1. FM/CSA
FM/CSA Explosion-proof model
THIS EQUIPMENT IS SUITABLE FOR USE IN CLASS I,II,III,
DIVISION 1, GROUPS (B, C, D, E, F, G).
CAUTION:
(1) power supply and internal voltage of ordinary equipment to the earth shall
not exceed AC250V 50/60HZ, DC250V in case of normal /formal condi-
tions.
(2) ambient temperature is from –10 to 60°C
(3) Process temperature is from –40 to 160°C
Continued on next page