Proper Spectral Response
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Proper Spectral Response
Choosing the proper equipment for an infrared inspection is of paramount importance when performing an infrared inspection.
Each model of infrared imaging system has many unique operating characteristics which must be considered before a project is undertaken. Of these, perhaps the most important is spectral response.
Spectral response for an imager generally falls into two categories: 2-5 microns (near infrared) or 8-14 microns (far infrared). Because spectral response can limit one’s ability to perform certain types of inspections, it is critical that a thermographer understand how spectral response can affect his/her work.
Below are some generally recommended spectral responses for different types of P/PM applications.
| Application | 2-5 microns | 8-14 microns |
| Indoor electrical systems |
X
|
X
|
| Outdoor electrical systems |
X
|
|
| High temperature targets |
X
|
|
| Highly reflective targets |
X
|
|
| Boiler/heater tubes – gas fired |
X
|
|
| Long distance imaging |
X
|
|
| Smooth surfaced roofs |
X
|
|
| Gravel surfaced roofs |
X
|
X
|
| Glass |
X
|
|
| Plastics |
X
|
Proper conduct of an infrared inspection and interpretation of data require thorough training and certification by a recognized training agency. For more information on training and certification, contact Infraspection Institute at 609-239-4788 or online at www.infraspection.com
