MICRO-EPSILON TIM 160 Especificaciones descargar pdf (Pagina 66)

Emissivity

thermoIMAGER TIM 66

Emissivity

12.1 Definition

The intensity of infrared radiation, which is emitted by each body, depends on the temperature as well as on

the radiation features of the surface material of the measuring object. The emissivity (ε – Epsilon) is used as

a material constant factor to describe the ability of the body to emit infrared energy. It can range between 0

and 100 %. A “blackbody” is the ideal radiation source with an emissivity of 1.0 whereas a mirror shows an

emissivity of 0.1.

If the emissivity chosen is too high, the infrared thermometer may display a temperature value which is

much lower than the real temperature – assuming the measuring object is warmer than its surroundings. A

low emissivity (reflective surfaces) carries the risk of inaccurate measuring results by interfering infrared

radiation emitted by background objects (flames, heating systems, chamottes). To minimize measuring

errors in such cases, the handling should be performed very carefully and the unit should be protected

against reflecting radiation sources.

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MICRO-EPSILON TIM 160 Especificaciones Pagina 66