What is thermography?Testo UK Ltd.

2012 Testo UK Ltd.

2/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

Hello & Welcome

Ever wondered what Thermography is and what it can be used for?

In this short presentation we demonstrate the science behind the technique and the areas in which this technology will be beneficial.

3/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

Discovery of infrared radiation around 1800 by Friedrich Wilhelm Herschel in England

Sir Friedrich Wilhelm Herschel (* 15th November 1738 in Hanover; † 25th August 1822 in Slough) was a German-British astronomer and musician.

Physicist Max Planck proved as far back as 1900, that there is a correlation between the temperature of a “Body” and the Intensity of the Infrared Radiation that it emits

4/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

Thermal, or infrared energy, is light that is not visible because its wavelength is too long to be detected by the human eye; it's the part of the electromagnetic spectrum.

Unlike visible light, in the infrared world, everything with a temperature above absolute zero emits heat. Even very cold objects, like ice cubes, emit infrared. The higher the object's temperature, the greater the IR radiation emitted. Infrared allows us to see what our eyes cannot.

5/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

Thermal imagers detect and record Infra-red radiation emitted from the surface of any subject being viewed. The imager does not have the ability to see below the surface. However, the radiation from the surface is often influenced by sub-surface detail, which effects the thermal characteristics of adjoining material(s).

Thermal Imaging / Thermography is the conversion of Infrared Radiation into Thermal images. A thermal image is an analogue pictorial representation or visualisation of temperature differences.

All objects above absolute zero (-273 degrees) emit radiation, some of which is infra-red. Depending on temperature and emissivity, most objects in the world can be thermally imaged.

6/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

The combination of all the impulses from all of the elements creates the image.

IR Optic

2 dim.Detector-

Matrix

FPA-Camera(Focal Plane

Array)

I I

A special lens focuses the infrared light emitted by all of the objects in view.

The focused light is scanned by a phased array of infrared-detector elements. The detector elements create a very detailed temperature pattern called a thermogram.

It only takes about one-thirtieth of a second for the detector array to obtain the temperature information to make the thermogram.

This information is obtained from thousands of points in the field of view of the detector array.

The thermogram created by the detector elements is translated into electric impulses.

The impulses are sent to a signal-processing unit, a circuit board with a dedicated chip that translates the information from the elements into data for the display.

The signal-processing unit sends the information to the display, where it appears as various colours depending on the intensity of the infrared emission.

7/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

What are the benefits?

• Non-contact process / Non Intrusive

• Can safely see /visualise, temperatures of components, moving objects, thermal patterns, very hot objects (Up to 2000°C) and high voltage objects

• Thermal Imaging gives us an overall temperature profile of the subject rather than the temperature at one point

• A thermal image gives a visual indication of temperature differences and when it is a Radiometric Thermal Image, it will also give temperature measurement.

31.7°C

65.6°C

40

50

60

8/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

Where can thermal imagers be used?

• Building Fabric Investigations

• Electrical Equipment Surveys

• Mechanical Equipment Surveys

• Heating Systems & Pipe Location

• UPS Battery Systems

• Chilled Ceilings

• IT Cooling Systems

• System / Process Testing / Product Design

• Medical / Equine Veterinary

• And Many Many More

9/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

Thermal Imaging provides a visualisation of temperature differentials which can help to identify anomalies / faults. Thermal Imaging allows you to see more.

To See More – Is to Know More

10/2Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe

info@testo.co.ukwww.testolimited.com

      

       

         

          

01420 544433