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Ultrasonic Testing (UT) – Levels 1 and 2 - Pre-course eLearning Package
Ultrasonic Testing (UT)
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Ultrasonic Testing (UT) Course

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Ultrasonic Testing (UT) – Levels 1 and 2 - Pre-course eLearning Package

If you enrol on a classroom-based course in ultrasonic testing with TWI, you can now ensure you are fully prepared using our pre-course eLearning packages. These entirely optional add-ons allow you to familiarise with all of the key concepts that will be covered in the classroom, giving yourself the best possible chance of learning everything you need to achieve certification.

This option is only available to students enrolling on full courses. The eLearning material is made available 30 days before the course start date, giving you plenty of time to build your confidence before you enter the classroom.

 The eLearning part of this training course is divided in four modules:

  •  Module 1: Basic Principles of Ultrasound and Ultrasound Testing

  •  Module 2: Principles Underlying Time of Flight Diffraction

  •  Module 3: Data Analysis

  •  Module 4: Review

Each module contains:

  • Pages explaining the underlying theory

  • Videos explaining the theoretical and practical aspects of Ultrasound Testing, Silverlight interactive exercises in which the student can build a set-up, practice calibration and scanning and learn to evaluate real data        

Prices depend where you will be attending the course - find out more

When you have booked your training, you will receive an email notification with your login details. You will then have 30 days before the course start date to go through the modules.  

 Module 1: Basic Principles of Ultrasound and Ultrasound Testing

  • Non-Destructive Testing (NDT), certification

  • History of ultrasonic testing, sound vs. ultrasound     
  • Distance, velocity, cycle, material density, acoustic impedance, reflection and transmission
  • Sine wave, frequency, wavelength, longitudinal waves, shear waves

  • dB system

  • The shell of an ultrasound instrument, types of probe, types of wedge

  • A-Scan, signal amplitude, B-Scan, C-Scan

  • Pulser/receiver, peak pulse, square pulse

  • Couplant, time-of-flight calculation, wave propagation, attenuation

  • Beam, sound field, near field, dead zone, sensitivity, resolution, penetration

  • Through transmission, pulse echo, angle beam, immersion, PAUT, ToFD

  • Structure and qualification of a procedure, training, acceptance criteria

  • Calibration blocks, couplant

  • Marking on part, probe positioning, scanning pattern

  • Naming files, storing data

  • Section’s test   

   Module 2: 0-Degree Ultrasonic Testing

  • Thickness measurements, lamination checks, corrosion mapping 

  • Analog and digital instruments, pulser/receiver, digitizer, filters, gain

  • Contact probes, focused probes, dual-element probes

  • Hard wedges, wheel probes, squirters, height calculation

  • Full screen height, full screen width, cursors, gates

  • Wave and beam, transit time, PRF, wedge signal

  • Distance probe-part, probe angle

  • Time base linearity, gain linearity, beam edge plot, near zone calculation, transfer correction

  • Calibration, velocity, wedge delay, DAC, TCG, other

  • Measuring, depth and amplitude, length and width, mapping flaws

  • Interactive exercises, set-up, calibration, scanning and evaluation 

  • Section’s test

  Additional topics covered for Level 2

  • Steel making, ingots, slabs, castings, rolling, extruding, forging

  • Corrosion process, accelerating factors, preventing corrosion

  • Scanner components, encoder

Module 3: Angled Ultrasonic Testing

  • Weld inspection

  • Angled wedge

  • Legs

  • Snell’s law, incident vs. refracted, critical angles, refracted shear waves

  • Beam angle, beam index point, shear and longitudinal waves

  • Coverage

  • Calibration, blocks, beam index point, refracted angle

  • Calibration, velocity, wedge delay, sensitivity, DAC, TCG

  • Skip distance, V-path

  • Measuring, length, height

  • Interactive exercises, set-up, beam index point, beam angle, sensitivity, scanning and evaluation

  • Section’s test 

  Additional topics covered for Level 2

  • Grain structure, butt welds, fillet welds

  • SMAW, SAW, GTAW, GMAW, gouging

  • Calibration block, beam edge plot -20dB, near field angled, transfer correction

  • Calibration, IOW blocks, flat bottom holes, background noise

  • Calibration, pulse duration check, resolution check

  • Lamination check

  • Scanning sensitivity, weld scanning, root scanning, transverse discontinuities scanning

  • Defects, amplitude, directional reflectivity, echostatic pattern, echodynamic pattern      

 Module 4: Angled Ultrasonic Testing

  • Introduction

  • Hardware

  • Scans and views

  • Basic theory

  • Set-up

  • Calibration

  • Inspection

  • Data analysis

  • Interactive exercises


So that your computer can run the Phased Array eLearning modules you will need the following basic systems:

Operating System
Windows Vista 7, 8 or 10

Internet Explorer 11 or higher (PC)

Silverlight Plug-in

You can get the Silverlight Plug-in using the following link:

Internet connection:
2 MBIT/s


To get an idea of what you can expect when you begin the course, and view some helpful tutorial videos , click the link below:

View the course taster

Please use the latest version of the browser Internet Explorer with Silverlight installed to view the tasters. Videos are best seen in full screen mode, exercises must be in full screen mode to work.