How it Works
Azbil
Loading...
MGG15
User Manual
74 pgs2.16 Mb0

Azbil MagneW FLEX+, MagneW PLUS+, MGG15, MGG17 User Manual

MagneW FLEX+/PLUS+
Electromagnetic Flowmeter
Explosion-proof type Detector
Model: MGG15/17
User's Manual
C
M2-MGG120-2001
Copyright, Notices and Trademarks
,QQRHYHQWLV$]ELO&RUSRUDWLRQOLDEOHWRDQ\RQHIRUDQ\LQGLUHFW VSHFLDORUFRQVHTXHQWLDOGDPDJHV7KLVLQIRUPDWLRQDQGVSHFLILFDWLRQV LQWKLVGRFXPHQWDUHVXEMHFWWRFKDQJHZLWKRXWQRWLFH
MagneW is a trademark of Azbil Corporation in Japan and/or other countries.
© 1997–2019 Azbil Corporation. All Rights Reserved.
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 fea­tures make this product deliver outstanding flow rate measurement.
i
Unpacking and Inspection
Unpacking the MagneW FLEX+/PLUS+
Verifying specifications
This device is a precision instrument and should be handled with care to pre­vent 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 follow­ing:
• Detector bore diameter
• Electrode material
• Flange rating
• Grounding ring material
Inquiries
Storage precautions
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.
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.
ii
Safety Precautions
Introduction
Signal words
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.
Safety precautions in this manual are of two kinds —Warning and Caution. The meaning of these flags is as follows:
Warning
Caution
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.
iii
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.
iv

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
v
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
vi
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
vii
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 - 1
1-1 System Configuration
Measuring System
Introduction
Examples of flow measurement systems
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.
Figures 1-1 show examples of measurement systems using the device.
Figure 1-1 Integral Configuration
Converter
AC power supply
Pulse output
Contact input/output
Analog output
Digital output
Dedicated cable
Hazardous Area
Detector
Excitation output
Flow signal input
Fluid
1 - 2
1-2 Structure of this Unit and Functions of Parts
Detector
Explanation
Names of major parts of the wafer type
The functions and structure of the device are as follows.
• When a fluid passes through the detector, the detector generates an electro­motive force signal proportional to the flow rate.
• The electrodes are both mounted horizontally.
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
Pressure-resistant packing cable adapter (only for TIIS)
Terminal box cover
Terminal box
Flow direction mark
Grounding ring
Electrode cover
Mounting screw (4 places)
1 - 3
Continued on next page
Detector Continued
Names and func­tions of parts
This table explains the major parts of the detector.
Name
Flow direction mark
Electrodes • The electrodes generate an electromotive force sig-
Electrode cover • Houses the electrodes. Do not remove the cover
Grounding ring • The electrode material varies according to the cor-
Terminal box • Houses the connection terminals used to apply a
Terminal box cover (remote model only)
• Indicates the direction of fluid flow.
• Mount the detector so that the measured fluid flows in the direction indicated by this mark.
nal proportional to the flow rate of the fluid passing through the detector.
• The electrode material varies depending on the cor­rosion characteristics of the fluid to be measured.
with the detector installed on a pipe.
rosive characteristics of the fluid to be measured. Also, the structure varies with the material.
standard voltage.
• Houses excitation and signal terminals.
• Keep the terminal box cover on during operation.
Function
Pressure-resistant Pack­ing Cable Adapter
• Seals the cable terminal to assure and enhance ex­plosion-proof capability, insulation resistance and mechanical strength. Required for any explosion­proof instrumentation.
Warning
• To prevent the gas or liquid in the pipe from escaping do not re­move the electrode cover or the electrodes when the detector is installed on a pipe.
1 - 4
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
Pressure-resistant packing cable adapter (only for TIIS)
Electrode cover
Grounding terminal
Terminal box cover
Terminal box
Flow direction mark
Flange
Grounding ring
Mounting screw (4 places)
Continued on next page
1 - 5
Detector Continued
Names and func­tions of parts
This table explains the major parts of the detector.
Name
Flow direction mark
Electrodes • The electrodes generate an electromotive force sig-
Electrode cover • Houses the electrodes. Do not remove the cover
Grounding ring • The electrode material varies according to the cor-
Terminal box • Houses the connection terminals used to apply a
Terminal box cover (remote model only)
Pressure-resistant Pack­ing Cable Adapter
• Indicates the direction of fluid flow.
• Mount the detector so that the measured fluid flows in the direction indicated by this mark.
nal proportional to the flow rate of the fluid passing through the detector.
• The electrode material varies depending on the cor­rosion characteristics of the fluid to be measured.
with the detector installed on a pipe.
rosive characteristics of the fluid to be measured. Also, the structure varies with the material.
standard voltage.
• Houses excitation and signal terminals.
• Keep the terminal box cover on during operation.
• Seals the cable terminal to assure and enhance ex­plosion-proof capability, insulation resistance and mechanical strength. Required for any explosion­proof instrumentation.
Function
Warning
• To prevent the gas or liquid in the pipe from escaping do not re­move the electrode cover or the electrodes when the detector is installed on a pipe.
1 - 6
Figure 1-4 Cable adapter with flameproof packing
Figure 1-5 Details of the cable adapter with flameproof packing
1 - 7
Detector Terminal Box
Names of parts
Names and explanations of parts
Figure 1-6 Detector Terminal Box
Signal terminals
Conduit wiring connectors
Excitation terminals
Grounding terminal
The table below explains the major parts of the detector terminal box.
Name Explanation
Signal terminals
Excitation terminals
Conduit wiring connectors • The excitation cable and the signal cable are
Grounding terminal • This terminal is used to ground the detector
• These are marked A, B, and C.
• These are marked X and Y.
wired through these connectors.
(class 3 grounding).
Warning
• Turn off power to the converter side before wiring, to avoid electric
shock.
Caution
• 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.
1 - 8
1.3 Use of Explosion-proof Electromagnetic Flowmeters for TIIS
Before use
Flameproof structure
Location guide­lines
This flowmeter is of flameproof structure. Read this item carefully to ensure correct use.
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.
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.
1 - 9
Nameplates
The flowmeter is required to pass a certified examination conducted in accor­dance with Industrial Safety and Hygiene Regulations. The Industry Safety Engineering Association authorizes the flowmeter to carry a certified name­plate only after passing the examination.
Figure 1.6 Certified Nameplate
1 - 10
1.4 Use of Explosion-proof Electromagnetic Flowmeters for FM/CSA
Before use
Flameproof (Explosion­protection) structure
Location guidelines
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 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.
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
1 - 11
If an MGG18/19 detector is used with an MGG14C converter as an FM-approved nonincendive product, both the detector and the converter should be FM-approved nonincendive products. If they are not, the MGG18/19 detector cannot be used as an FM-approved nonincendive product.
1 - 12

Chapter 2 - Installing the Device

Introduction
This section describes the installation and wiring of Electromagnetic Flowmeter.
The required parts and method for installing this device may vary slightly depending on the material of the wetting ring and the pipe.
Installation is explained in the following order:
• Criteria for selecting the installation environment
• An outline of the method of installing the device
• Detailed methods of installation depending on the material
2 - 1
2-1 Before Installing
Criteria for Selecting the Installation Site (1)
Introduction
Environment
In order to make full use of the functions of the device, select an optimal installation site by following the selection criteria below.
Caution
• Install the unit in a location with an ambient temperature of –25 to +60°C and a relative humidity of 5% to 100%. Failing to meet these requirements could cause output errors.
• Install the unit away from high-current power lines, motors and transformers to prevent damage from electromagnetic induction. Failing to meet this requirement could cause output errors.
• Do not install the unit in a location subject to severe vibration or a highly corrosive atmosphere. Failing to meet this requirement could break the neck of the detector or cause other damage.
• As far as possible, install the unit out of direct sunlight. Failing to meet this requirement could cause output errors.
Fluid to be measured
Caution
The location for your MagneW FLEX+/PLUS+ must satisfy the following conditions. Failing to meet these requirements could cause output errors and fluctuations.
• A location where the conductance of the fluid to be measured matches the stated specification (specs. vary according to the con­verter used) and is more or less constant.
• A location where the fluid to be measured can be regarded as elec­trochemically uniform. For example, if two fluids are mixed at an upstream point, the two fluids should be uniformly mixed by the time they reach the measurement point.
• A location where the distribution of suspended matter, if any, can be regarded as nearly uniform
Continued on next page
2 - 2
Loading...
+ 51 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use