Eddy Current Testing

Based on the syllabi issued by the American Society for Non-Destructive Testing (ASNT) and the Aerospace requirements of PCN, the course provides a thorough foundation for technicians, inspectors, and engineers called upon to witness, supervise, or conduct Eddy Current Tests.

The course satisfies the formal training element of the Recommended Practice SNT-TC-1A issued by ASNT, and the requirements of PCN/GEN/, and hence is the basic foundation, which can lead to qualification under PCN, SNT-TC-1A, BS EN 4179 or NAS-410 requirements.

Practical aspects are emphasised by ensuring that all theoretical training is complemented with opportunity to apply a variety of techniques and methods under the guidance of qualified instructors. At level 2, students are introduced to both static and dynamic phase display instrumentation along with instruction and report writing.

Students are introduced to the variety of practical applications with Eddy Current Testing paving the way for further training in Specific Techniques and Industry sectors.

Students are assessed for comprehension and progress during the course, via a structured series of both theoretical and practical phase assessments, which facilitate counselling and assistance where required. On request a formal end of course examination can be conducted.

The content of the course includes: -

The basic theory of Electric Current Flow, Alternating Currents and Resistance.
Induction (Electromagnetic). Impedance, Frequency, Magnetism.
Electromagnets, Magnetic Properties of a material. Eddy Current Theory.
Tests coils and probes. Properties affecting Eddy Currents.
Eddy Current Test Equipment. Basic test circuits. Calibration blocks.
Mode of operation of a Cathode Ray Tube.
Characteristic/Limit Frequency. Test Frequency Ratios. Vector Diagrams.
Impedance Diagrams. Reference Numbers. Phase Analysis. Types of Discontinuities
and their Origins. Detectable Discontinuities and Non-relevant Indications.
Evaluation of Indications. Instruction/Technique Writing. Report Writing and
the understanding of Specifications.
(A full Syllabus can be supplied on request).

Lunch, refreshments and a full set of course notes will be provided during the course.