NDT Training Services by NDT Consulting Group Inc. Level III Instructors

Eddy Current Course Outline

The following is typical of the topics taught for eddy current. All course outlines can be, and usually are, modified to meet client needs.

Introduction to Electromagnetic Testing (ET)

NDT Training and Certification Requirements

History of Eddy Current Inspection

Present State of Eddy Current Inspection

Applications

Advantages

Limitations

Physics of Eddy Current Inspection

Fundamentals of Electricity

AC Current Principles

Resistance

Inductance

Mutual Inductance

Self Inductance

Inductive Reactance

Skin Depth

Impedance

Complex Impedance Plane

Generation of Eddy Currents

Characteristics of eddy currents

Variables which affect Coil Impedance

Instrumentation

Circuits

Resonate Circuits

Amplitude Analysis

Bridges

Display - Impedance Plane

Display - Analog Meter

Display - Digital Meter (Conductivity)

Display - Strip Charts

Probes & Applications

Surface (Breaking) Cracks

Corrosion

Material Sorting (Conductivity)

Thin Layer Material (Conducting)

Thin Layer Material (Non-Conducting)

Crack Detection (Reflection)

Differential-vs-Absolute

Reference Standards

Types and uses

Interpretation and Evaluation of ET Signals

Impedance Plane Display and Analysis

Phase analysis

Coil (Probe) Design

Diameter

Turns

Impedance Matching

Shielding

Advanced Techniques

Scanning

Pulsed Eddy Current

Swept Frequency

Remote Field (Signal Processing)

ECSIM

User Specification and Operating Procedures

 

Formulae & References

EC Formulae

References