The Art and Science of Infrared Temperature Measurement

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The Art and Science of Infrared Temperature
Measurement

• Corey Glassman
• Fluke Corporation

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The ART of Thermography
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Normal
Faulty
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The SCIENCE of Thermography

• Thermography is the science of infrared imaging
  using thermal cameras.
• Thermal cameras are instruments that create
  pictures of heat rather than light. They measure
  infrared (IR) energy and convert the data to
  corresponding images of temperature.

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• Non-contact infrared imagers provide fast, safe,
  accurate measurements for objects that are

• Moving or very hot
• Difficult to reach
• Impossible to shut-off
• Dangerous to contact
• Where contact would damage, contaminate or change
  temperature

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The electromagnetic (EM) spectrum is a name that
scientists give types of radiation when they want
to talk about them as a group.
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X-rays
10-2
Infrared radiation, like light and radio waves,
is a form of electromagnetic energy.
Ultra- violet
0.28
0.40
0.70
Wavelength in Microns (µm)
Near Infrared
2.00
Short Wave Infrared
6.00
Middle Infrared
Thermal
8.00
Long Wave Infrared
15.00
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Microwave
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How do we get the picture?
Each of the thousands of elements, or pixels,
contain an accurate temperature value. The
Imager, through the use of a complex set of
algorithms, assign specific colors that
correspond exactly with the temperature value
found at the specific X Y coordinate.
Fluke Imagers are Radiometric when an image is
captured using any Fluke Thermal Imager, all of
the background data is also saved along with the
picture allowing in-depth post processing
analysis.
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Radiometric temperatures

• Not all radiometric temperature measurements are
  real.
• The Ti20 measures the total radiation coming from
  a surface, that includes radiation
• Emitted by the object
• Reflected by the object

Emitted
Only emitted radiation relates to the temperature
of the object.
Reflected
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Emissivity

• Emissivity is a material property that describes
  the efficiency with which an object radiates or
  emits heat.
• Emissivity is a value from 0-1.0
• Shiny metals have low emissivity
• Non-metals have high emissivity

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The reason? Emissivity
Shiny Aluminum
424F
437F
Coated Surface
410F
82F
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Many materials are highly reflective to visual
light and infrared radiation

• Low emissivity objects are quite reflective of
  their thermal surroundings

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Many materials are highly reflective to visual
light and infrared radiation
Low emissivity objects are quite reflective of
their thermal surroundings
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The Challenge

• Introduce nine new thermal imager cameras to the
  market in Q2, 2006
• Train internal personnel
• Educate distributors to 3rd level
• Educate reps
• Provide education to end users

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Step 1

• Develop Needs Assessment with end user and
  distributor partners
• Quantify and evaluate findings
• Benchmark against existing programs

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Step 2 Develop PowerPoint

• Field test to refine contents and message

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Step 3 Convert to Flash with minimal time
and budget
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E-Mail the Presentation
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or conduct on-line
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and then converted to Flash
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Questions?