NDT Services, Training, Consulting and Calibration

Infrared Thermography
Level I

Course Description:
This course is designed to meet the industrial qualification requirements for Infrared Thermography Testing. Training covers basic theory, test principles, products, equipment operation and safety operating procedures, applicable techniques, applicable specifications, codes, and written instructions used by the employer and interpretation of indications. The course satisfies the training hours required for Level I certification. This course satisfies the training hours needed for Level I certification in accordance with SNT-TC-1A, CP-189 and NAS-410.

Duration: 32 hours

Course Outline

Basic Thermal / Infrared Physics Course

  1. The nature of heat – what is it and how is it measured / expressed?
    1. Instrumentation
    2. Scales and Conversions
  2. Temperature – what is it and how is it measured / expressed?
    1. Instrumentation
    2. Scales and conversions
  3. Heat Transfer Mode Familiarization
    1. Heat conduction fundamentals
      1. Fourier’s Law of heat conduction (concept)
      2. Conductivity / resistance basics
    2. Heat convection fundamentals
      1. Newton’s law of cooling (concept)
      2. Film coefficient / film resistance basics
    3. Heat radiation fundamentals
      1. Stefan – Boltzmann Law (concept)
      2. Emissivity / Absorptivity / Reflectivity / Transmissivity basics (Kirchhoff’s Law)
  4. Radiosity Concepts Familiarization
    1. Reflectivity
    2. Transmissivity
    3. Absorptivity
    4. Emissivity
    5. Infrared radiometry and imaging
    6. Spatial resolution concepts
      1. Field of view (FOV)
      2. Instantaneous field of view (IFOV) ref. ASTM E-1149
      3. Minimum resolvable temperature difference (MRTD) ref. ASTM E-1149, E-1213
      4. Spatial resolution for temperature measurement – the Split Response Function (SRF)
    7. Error potential in radiant measurements (and overview)

Basic Thermal / Infrared Operating Course

  1. Introduction
    1. Thermography defined
    2. How Infrared imagers work
    3. Differences among imagers and alternative equipment
    4. Operation of infrared thermal imager
      1. Selecting the best perspective
      2. Image area and lens selection for required details
      3. Optimizing the image
    5. Operation of support equipment for infrared surveys
  2. Checking Equipment Calibration with Blackbody References
  3. Infrared Image and Documentation Quality
    1. Elements of a good infrared Image
      1. Clarity (focus)
      2. Dynamic range of the image
      3. Recognizing and dealing with reflections
      4. Recognizing and dealing with spurious convection
    2. Recording
      1. Videotape
      2. Photographic images
      3. Video Photo cameras
      4. Digital recording
      5. Video printers
  4. Support Data Collection
    1. Environmental data
    2. Emissivity
      1. Measurement
      2. Estimation
      3. Surface modification
    3. Surface reference temperatures
    4. Identification and other

Basic Thermal / Infrared Applications Course

  1. Detecting Thermal Anomalies Resulting from Differences in Thermal Resistance (Quasi Steady-State Heat Flow)
    1. Larger surface-to-ambient temperature differences
    2. Small surface-to-ambient temperature difference
  2. Detecting Thermal Anomalies Resulting From Differences in Thermal Capacitance, Using System or Environmental Heat Cycles.
  3. Detecting Thermal Anomalies Resulting from Differences in Physical state.
  4. Detecting Thermal Anomalies Resulting from Fluid Flow Problems
  5. Detecting Thermal Anomalies Resulting from Friction
  6. Detecting Thermal Anomalies Resulting from Non-homogeneous Exothermic or Endothermic Conditions
  7. Field Quantification of Point Temperatures
    1. Simple techniques for emissivity
    2. Typical (high emissivity) applications
    3. Special problems of low emissivity applications.

Maldague, X.P.V., tech. ed., Patrick 0. Moore, ed. Nondestructive Testing Handbook, third edition: Volume 3,
Infrared and Thermal Testing. Columbus, OH: The American Society for Nondestructive Testing, Inc.
Lncropera, F.P., and David P. Dewitt. Fundamentals of Heat and Mass Transfer, 5th Edition. Hoboken, NJ: John Wiley & Sons.
Kaplan, H. ASNT Level III Study Guide: Infrared and Thermal Testing Method. Columbus, OH. The American Society for Nondestructive Testing, Inc.
ASTM E 2582, “Standard Practice for Infrared Flash Thermography of Composite Panels and Repair Patches Used in Aerospace Applications