Eddy Current Level 1

Training Objectives
This course provides a basic knowledge of eddy current testing fundamentals sufficient to enable the technician to carry out eddy current testing to established procedures under the supervision of Level 2 or Level 3 personnel.

Applicable Standards
This course meets the training syllabus requirements of CAN/CGSB-48.9712, ISO 9712 and SNT-TC-1A.

Responsibilities of Level 1 Personnel (as per CGSB)
Level 1 personnel are defined as personnel who will carry out industrial eddy current non-destructive inspection under the supervision of Level 2 or Level 3 personnel and will not be responsible for the eddy current test method or technique to be used, nor for the assessment of test results.

Course Outline

Fundamental Theory
  • Basic fundamentals of electricity
  • Relationship of resistivity to electrical resistance
  • Relationship of material resistivity to material conductivity
  • Electromagnetic induction; self inductance and mutual inductance
  • Inductance of eddy current coils
  • Generation of eddy currents
  • Properties of eddy current flow
  • Sensing disturbance of eddy current flow through change in coil impedance
  • Basic equipment
  • Introduction to impedance plane diagrams
  • Skin effect, standard depth of penetration, standard phase lag
  • Instrumentation
  • Fundamental operation of: impedance bridge instruments; crack detectors; conductivity meters; recording instruments; strip chart records and FM tape recorders
Testing with Surface Probes
  • Probe types
  • Directional properties of eddy current flow for each probe type
  • Calibration
  • Measuring resistivity; measuring thickness
  • Measuring thickness of a non-conducting layer on a conductor
  • Inspecting for defects
  • Parameters affecting sensitivity to defects
Testing of Tubes and Cylindrical Components
  • Probe types
  • Comparing differential and absolute probes
  • Directional properties of eddy current flow for each probe type
  • Calibration
  • Inspecting for defects
  • Parameters affecting sensitivity to defects

Note: Participants are requested to have a calculator capable of scientific notation. Safety shoes are mandatory for all laboratory work.

This course is offered in partnership with Canadian Institute for Non-Destructive Evaluation (CINDE).

Visit the CINDE website to register.