Is it for me?

This refresher eLearning course is designed for technicians who are already certified, but would benefit from a reminder of the fundamentals of Time of Flight Diffraction (ToFD). It is an excellent way to remind yourself of the underlying principles and skills required to conduct this type of inspection.

Refresher courses are available for 14 days consecutive access from the date of activation. During that time they can be completed entirely at your own pace, with the option to repeat any sections as needed.
When you have booked your online training, you will receive an email notification with your login details.

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What will I learn?

The Refresher eLearning Package is divided in three modules:

Module 1: Self-evaluation Test

  • 40-question test
  • Link to an explanatory video for each question
  • Grade obtained

Module 2: Theory

  • Instrument, digitizers, filters
  • Probes, frequency spectrum, signal waveform, pitch and catch
  • B-Scan, gray scale
  • Whisker effect, parabolic cursors
  • Non-parallel and parallel scans
  • Huygens’ principle, diffraction
  • Snell’s law, incident and refracted waves
  • RF signals, phase shift, averaging
  • PCS, depth calculation, position uncertainty
  • Beam spread, lateral wave, backwall, mode-converted backwall
  • Limitations, dead zones, accuracy, resolution
  • Indications, top-surface breaking, bottom-surface breaking, embedded
  • Geometrical indications, double-V welds, pipe misalignment, double thicknesses
  • Settings, filters, averaging, time window, sensitivity, scan resolution, PRF
  • Velocity calibration, lateral wave straightening
  • Analysis, signal start, grouping, point-like
  • Analysis, height and depth, length and position

Module 3: Interactive Exercises

  • Defect viewer, top-surface breaking, bottom-surface breaking, embedded
  • Set-up, beam index point calibration, velocity calibration
  • Scanning, wedge delay calibration, lateral wave straightening
  • Data analysis

What will I leave with?

This refresher course will help you to revise your knowledge of the fundamentals of Time of Flight Diffraction.

What else should I know?

eLearning Technical Specifications

In order to run the ToFD eLearning modules you will need the following basic systems:

  • Operating System: Windows Vista 7, 8 or 10
  • Browser: Internet Explorer 11 or higher (PC)
  • Plugin: Silverlight Plug-in>You can get the Silverlight Plug-in using the following link:
  • Internet connection: 2 MBIT/s

Please note: When you have booked your online training, you will receive an email notification with your login details.

UK fee: £350 + VAT

Book your place on the course

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Virtual Academy

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