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Eddy Current Level 2

PREREQUISITE: Registrants must satisfy all prerequisites that pertain to this training course.

TRAINING OBJECTIVES: This course provides a thorough grounding in the principles of eddy current testing and the fundamentals of engineering, materials and components, such that the technician will be able to:

  • identify the suitability of eddy current testing for all materials and inspection applications
  • develop inspection techniques and prepare procedures that can be followed by a Level 1 technician
  • provide analysis of inspection data
  • document results of the analysis
  • be familiar with regulatory codes and specifications for eddy current testing and their intent

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

RESPONSIBILITIES OF LEVEL 2 PERSONNEL (AS PER CGSB): Level 2 personnel are defined as personnel who will perform and/or direct industrial eddy current inspection according to established or recognized procedures and shall be responsible for the eddy current test method or technique to be used and for the interpretation of the test results.

COURSE OUTLINE:
  1. 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

  2. Advanced Theory
    • Fundamental properties of eddy current flow
    • Depth of penetration in finite thickness samples
    • Phase lag in finite thickness samples
    • Simplified impedance diagrams
    • Correlation between coil impedance and sample properties

  3. Instrumentation
    • Bridge circuits
    • Typical bridge circuits in eddy current instruments
    • Bridge circuits in crack detectors
    • Principle operation of eddy current instruments
      - general purpose instrument (impedance method)
      - crack detectors
      - material sorting and conductivity instruments
      - send-receive eddy current systems
      - multifrequency equipment
      - pulsed eddy current equipment
      - recording equipment

  4. Testing with Surface Probes
    • Probe types
    • Special probe designs
    • Directional properties of eddy current flow for each probe type
    • Probe inductance and coil design characteristics
    • Parameters affecting sensitivity to defects
    • Impedance graph displays
    • Characteristic parameters
    • Definition of "phase" terminology
    • Selection of test frequency for:
      - inspecting for defects
      - measuring resistivity; measuring thickness
      - measuring thickness of a non-conducting layer on a conductor
      - measuring thickness of a conducting layer on a conductor
  1. Surface Probe Signal Analysis
    • Eddy current signal characteristics
    • Defect signal phase
    • Effect of material variations and defects in a finite thickness
    • Coil impedance changes with defects
    • Coil impedance changes with:
      - ferromagnetic anomalies
      - electrical resistivity
      - surface geometry
    • Calibration standards and signals from calibration defects
    • Estimating depth of surface breaking flaws
    • Calculating depth of sub-surface flaws

  2. Testing of Tubes and Cylindrical Components
    • Probe types
    • Special probe designs
    • Comparing "absolute" and "differential" probes
    • Directional properties of eddy current flow
    • Probe-cable resonance
    • Impedance plane diagrams
    • Characteristic frequency
    • Choice of test frequency

  3. Tube Testing Signal Analysis
    • Defect signal characteristics
    • Signal characteristic change with change of test frequency
    • Calibration standards and signals from calibration defects
    • Estimating depth of flaws
    • Vectorial addition of defects at baffle plates
    • Analysis of defect signals at tubesheet locations
    • Identifying anomalous eddy current signals
    • Analysis of signals using the "Multifrequency Method"

  4. Engineering, Materials and Components for Eddy Current Technicians
    • Electrical conductivity of materials
    • Factors which affect electrical conductivity
    • Material sorting
    • Magnetic properties of materials
    • Testing magnetic materials
    • Magnetic saturation techniques

  5. Codes and Specifications
    • Interpretation of codes and specifications commonly used

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

Upcoming Course Dates
Eddy Current Level 2 Day Courses in Hamilton, ON :
August 14 - 25, 2017
Approved as a vocational program under the Private Career Colleges Act, 2005
Ten Days (80 Hours)2 out of 12 seats takenPrice: $2250.00
Is the date you want "Full"? Do none of the above dates work for you?

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