Eddy Current Inspection (ET)
Eddy Current inspection (ET) is one of several NDT methods that use the principal of electromagnetism as the basis for conducting examinations. Eddy current testing equipment performs three basic functions: generating, receiving, and displaying. The generating portion of the unit provides an alternating current to the test coil creating eddy currents through a process called electromagnetic induction. The receiving section measures impedance and processes the signal from the test coil to the required form and amplitude for display. Instrument outputs or displays consist of a variety of visual, audible, storage, or transfer techniques utilizing meters, video displays, chart recorders, alarms, magnetic tape, computers, and electrical or electronic relays.
One of the major advantages of eddy current as an NDT tool is the variety of inspections and measurements that can be performed. This inspection method is sensitive to small surface cracks, pits, subsurface cracks, corrosion on inner surfaces, and other flaws and is used to inspect parts of complex shape and size. ET gives immediate results and is widely used within the commercial, military, petrochemical, aircraft and aerospace industries. In the proper circumstances, eddy current can also be used for material or
coating thickness measurements, heat damage detection, and conductivity measurements for material and alloy identification.
The Level I Eddy Current course requires no prior training or experience by the student, however, the Level II course does have specific training prerequisites. Training material is presented through lecture and presentation that promotes understanding and the ability to make immediate application. These courses are ideal for NDT trainees who must have Level I and II training in order to qualify for certification and the Level I course is well suited for personnel who are responsible for or oversee the application of testing or Quality Control/Quality Assurance.
Course Content
U2510 Basic Theory and Application of Eddy Current Level I.
This fundamental course is presented in a 40-hour classroom course and provides the essentials in electromagnetic theory, test instrumentation and coil design, and basic impedance plane principles. Other topics sudied include conductivity, dimensional factors (lift-off and material thickness), permeability, signal-to-noise ratio, frequency, and flaw detection applications.
Ample time is allowed for technique demonstrations and hands-on lab exercises. Lecture notes, text book and necessary testing materials are provided.
This curriculum satisfies the training hours recommended by The American Society for Nondestructive Testing for Level I studies. Lesson-by-lesson quizzes monitor progress and all three evaluation examinations (General, Specific and Practical) are administered by a qualified ASNT ACCP Level III.
U2520 Eddy Current Application Level II.
Prerequisite: E2510 or equivalent Level I training from a recognized source.
This advanced course is presented in a 40-hour classroom course and provides a review of basic electromagnetic theory, coil impedance, signal-to noise ratio, test frequency, and instrument design considerations. Techniques and applications including user standards and operating procedures and inspection techniques such as eddy current test setup and display interpretation based on impedance plane analysis. This course covers the application of surface probes, ID probes, and encircling coils. Ample time is allowed for demonstrations and hands-on lab exercises. Lecture notes, text book and necessary testing materials are provided.
This curriculum satisfies the training hours recommended by The American Society for Nondestructive Testing for Level II studies. Lesson-by-lesson quizzes monitor progress and all three evaluation examinations (General, Specific and Practical) are administered by a qualified ASNT ACCP Level III.
Alternative Course Options
U2411-WB Introduction to Eddy Current; Basic Principals and Application - Level I. Online Course
Online courses are ideally suited for technicians that are in need of refresher training or for trainees that have other means of gaining hands-on experience. All online courses include the "body of knowledge" recommended by ASNT and includes a final exam that can be utilized as the method's General Examination.
E2510 - Basic Theory and Application of Eddy Current Classroom Course
Level I with General, Specific and Practical Qualification Examinations included; 40-hours (5 days) |
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E2511-WB - Introduction to Eddy Current; Basic Principals and Application Online Course
Level I with General Qualification Examination; 8-hours (30 days to complete) |
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E2520 - Eddy Current Application Classroom Course
Level II with General, Specific and Practical Qualification Examinations included; 40-hours (5 days) |
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Qualification Examinations for Eddy Current Inspection:
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General Exam - comprehensive written examination that covers the basic principles (Body of Knowledge) of Eddy Current Inspection
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$ 100.00 |
Specific Exam - written examination that tests student's ability to read, interpret and apply specific procedure material for Eddy Current Inspection
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$ 100.00 |
| Practical Exam - hands-on demonstration of the student's ability to operate test equipment, perform specific calibrations and tests in order to find and report thickness readings of flaws in sample materials according to appropriate specifications |
$ 300.00 |
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