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Magnetic Particle Testing Lecture Guide l CONTENTS
Field Direction .........................................................................48
Magnetic Field Measurements ..........................................................48
Hall Effect Meter ...................................................................48
Pie Gage .........................................................................49
Adhesive Indicator .................................................................49
Circular Magnetization .................................................................49
Direct Contact .....................................................................50
Central Conductor .................................................................50
Amperage for Circular Magnetization .................................................50
Direct Contact Amperage .......................................................50
Central Conductor Amperage ....................................................51
Longitudinal Magnetization .............................................................51
Coil Shot ..........................................................................51
Cable Wrap .......................................................................51
Amperage for Longitudinal Magnetization .............................................52
Sensitivity Level ........................................................................52
Effect of Amperage on Sensitivity .....................................................52
Effect of Testing Media on Sensitivity ..................................................52
Lesson 9 Quiz .........................................................................53
Lesson 10: Magnetization by Means of Electric Current ......................................55
Introduction ..........................................................................55
Units of Measure and Terminology .......................................................55
SI Units for Magnetic Testing ..........................................................55
Magnetic Field Intensity ..........................................................55
Magnetic Flux Density ...........................................................56
Magnetic Flux ..................................................................56
Illumination .....................................................................56
Ultraviolet Radiation .............................................................56
Types of Magnetic Materials ............................................................56
Circular Magnetization .................................................................56
Circular Magnetization of Solid Test Objects ............................................57
Circular Magnetization with Prods ....................................................57
Circular Magnetization with Direct Contact ...........................................57
Circular Magnetization with Induced Current ...........................................57
Circular Magnetization of Hollow Test Objects .........................................58
Longitudinal Magnetization .............................................................58
Coil Magnetization .................................................................58
Field-Flow Magnetization ............................................................58
Yoke Magnetization ................................................................59
Yoke Break or Lift Test ............................................................59
Concurrent Leakage ............................................................59
Combined Circular and Longitudinal Magnetization ........................................59
Calculation of Magnetic Force Requirements .............................................60
Magnetic Particle Testing Lecture Guide l CONTENTS
Field Direction .........................................................................48
Magnetic Field Measurements ..........................................................48
Hall Effect Meter ...................................................................48
Pie Gage .........................................................................49
Adhesive Indicator .................................................................49
Circular Magnetization .................................................................49
Direct Contact .....................................................................50
Central Conductor .................................................................50
Amperage for Circular Magnetization .................................................50
Direct Contact Amperage .......................................................50
Central Conductor Amperage ....................................................51
Longitudinal Magnetization .............................................................51
Coil Shot ..........................................................................51
Cable Wrap .......................................................................51
Amperage for Longitudinal Magnetization .............................................52
Sensitivity Level ........................................................................52
Effect of Amperage on Sensitivity .....................................................52
Effect of Testing Media on Sensitivity ..................................................52
Lesson 9 Quiz .........................................................................53
Lesson 10: Magnetization by Means of Electric Current ......................................55
Introduction ..........................................................................55
Units of Measure and Terminology .......................................................55
SI Units for Magnetic Testing ..........................................................55
Magnetic Field Intensity ..........................................................55
Magnetic Flux Density ...........................................................56
Magnetic Flux ..................................................................56
Illumination .....................................................................56
Ultraviolet Radiation .............................................................56
Types of Magnetic Materials ............................................................56
Circular Magnetization .................................................................56
Circular Magnetization of Solid Test Objects ............................................57
Circular Magnetization with Prods ....................................................57
Circular Magnetization with Direct Contact ...........................................57
Circular Magnetization with Induced Current ...........................................57
Circular Magnetization of Hollow Test Objects .........................................58
Longitudinal Magnetization .............................................................58
Coil Magnetization .................................................................58
Field-Flow Magnetization ............................................................58
Yoke Magnetization ................................................................59
Yoke Break or Lift Test ............................................................59
Concurrent Leakage ............................................................59
Combined Circular and Longitudinal Magnetization ........................................59
Calculation of Magnetic Force Requirements .............................................60