Describe Magnetic Flowmeters
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Total Pages: 58
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Training Objectives
Upon completion of this magnetic flowmeters training kit, you will be able to:
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Describe the purpose and importance of magnetic flowmeters
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Describe magnetic flowmeter operation
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Describe common magnetic flowmeter components
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Describe the strengths and limitations of magnetic flowmeters
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Describe magnetic flowmeter installation requirements
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Describe operations and maintenance responsibilities for magnetic flowmeters
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Describe magnetic flowmeter proving, calibrating, and zeroing activities
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Describe fundamental magnetic flowmeter troubleshooting techniques
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Table of Contents
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Training Objectives
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1
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1
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Introduction
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1
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2
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Principle of Operation
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5
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2.1 Faraday's Law
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5
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2.2 Electrical Conductivity of Liquids |
7
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2.3 Liquids Suitable for Magnetic Flowmeters
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7
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3
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Components
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8
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3.1 Flow Tube
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9
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3.2 Magnetic Coils
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11
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3.3 Electrodes
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15
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3.4 Transmitter
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18
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4
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Strengths and Limitations
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19
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4.1 Strengths of Magnetic Flowmeters
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19
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4.2 Limitations of Magnetic Flowmeters
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20
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5
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Accuracy, Rangeability, Repeatability
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21
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5.1 Accuracy
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21
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5.2 Rangeability and Repeatability
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22
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5.3 Operating Specifications
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22
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6
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Installation
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23
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6.1 Flowmeter Size Selection
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23
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6.2 Flowmeter Location
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24
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6.3 Anchoring for Stability and Minimizing External Vibrations
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25
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6.4 Installation Guidelines
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25
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6.5 Properly Grounded Installation
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26
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7
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Operations Responsibilities
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28
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7.1 Operator Responsibilities
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28
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7.2 Maintenance Responsibilities
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29
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8
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Proving, Calibrating, and Zeroing
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29
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8.1 Proving Magnetic Flowmeters
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29
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8.2 Calibrating Magnetic Flowmeters
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30
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8.3 Zeroing Magnetic Flowmeters
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30
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9
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Troubleshooting
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31
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10
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Self-Check
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33
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11
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Self-Check Answers
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41
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