ASNT Level III IR study plan
ASNT Level III IR · Give each week a clear focus.
8 weeks · About 7 hours per week
Infrared Testing (IR) Method Fundamentals and Physics
Explain blackbody radiation laws (Planck, Stefan-Boltzmann, Wien, Kirchhoff) and their implications for IR testing
Differentiate between temperature, heat, and thermal energy, and describe heat transfer modes (conduction, convection, radiation)
Define emissivity and describe how surface condition, wavelength, and temperature affect it
Calculate radiant exitance and peak wavelength for given temperatures using blackbody equations
Your checkpoint
Create a formula sheet with definitions and units for key radiometric quantities and solve 10 numerical problems on blackbody radiation.
Infrared Equipment, Detectors, and System Performance
Compare photon and thermal detectors in terms of spectral response, cooling requirements, and applications
Explain key performance metrics: NETD, MRTD, IFOV, FOV, and spatial resolution
Describe the function of optical components (lenses, filters, windows) and their materials
Interpret detector specifications (e.g., pixel pitch, frame rate, dynamic range) to select a system for a given application
Your checkpoint
Produce a comparison table of detector types and a checklist for evaluating an IR camera's specifications for a specific inspection scenario.
Infrared Testing (IR) Method Fundamentals and Physics & Infrared Equipment, Detectors, and System Performance
Relate emissivity, reflectivity, and transmissivity to measurement accuracy and error sources
Explain the effects of atmospheric attenuation and how to compensate for it
Describe the purpose and operation of reference blackbodies and calibration procedures
Evaluate the impact of measurement parameters (distance, ambient temperature, humidity, emissivity) on temperature readings
Your checkpoint
Write a one-page procedure for setting up an IR camera to minimize measurement errors in an outdoor inspection.
Test Procedures, Techniques, and Applications
Outline pre-inspection steps: define objective, select equipment, prepare surface, and establish safety plan
Describe qualitative and quantitative inspection techniques and when to use each
Explain the importance of angle of view, focus, and scanning patterns
Identify common applications (electrical, mechanical, building envelope) and their specific procedural requirements
Your checkpoint
Develop a detailed inspection plan for a building envelope survey, including equipment settings, safety considerations, and data collection steps.
Test Procedures, Techniques, and Applications & Interpretation and Evaluation of Results
Analyze thermal images to distinguish true anomalies from artifacts (reflections, emissivity variations, convection)
Apply temperature measurement corrections and interpret isotherms and temperature profiles
Describe how to document findings with supporting visual and environmental data
Evaluate severity of anomalies based on temperature difference, load, and criticality
Your checkpoint
Given a set of thermal images (simulated), write a report identifying and classifying anomalies with justifications.
Interpretation and Evaluation of Results
Interpret and apply relevant standards for IR testing (e.g., ASTM, ISO, NETA, NFPA) to inspection scenarios
Explain the role of standards in establishing acceptance criteria and test procedures
Identify key requirements from ASNT SNT-TC-1A and CP-105 for personnel qualification and certification
Describe the content and purpose of an IR test report and typical documentation requirements
Your checkpoint
Create a summary sheet of key standards (ASTM E1934, E2016, etc.) and their scope, and list certification requirements from SNT-TC-1A.
Codes, Standards, and Specifications & Personnel Qualification, Certification, and Administration
Compare employer-based certification (SNT-TC-1A) with central certification (ASNT NDT Level III) and explain the Level III responsibilities
Outline the requirements for training, experience, and examination for Level III certification
Describe the elements of a written practice and how it governs personnel qualification
Explain the importance of code of ethics and professional conduct
Your checkpoint
Draft a written practice outline for an IR testing company, including training, experience, and examination requirements for Level I, II, and III.
Infrared Testing (IR) Method Fundamentals and Physics & Infrared Equipment, Detectors, and System Performance & Test Procedures, Techniques, and Applications & Interpretation and Evaluation of Results & Codes, Standards, and Specifications & Personnel Qualification, Certification, and Administration
Review all domains using practice questions and identify weak areas
Synthesize knowledge by solving integrated scenario-based problems
Revisit key formulas, standards, and procedures
Simulate exam conditions with a timed practice test
Your checkpoint
Complete a full-length practice exam (minimum 100 questions) with a score of 80% or higher, and create a remediation plan for missed topics.
Milestones
Week 4: Score at least 70% on a self-made quiz covering Domains 1-3, and submit the building envelope inspection plan for peer review.
Week 6: Successfully identify and classify anomalies in 5 out of 5 simulated thermal image cases with correct justification.
Week 8: Achieve a passing score (≥80%) on a comprehensive practice exam covering all domains, with no domain below 70%.