Absolute zero is -273.15 ° C (0 K = -459.69 ° F). No object emits infrared energy at a temperature above absolute zero, in which case it means that they do not emit any infrared radiation.

When the electromagnetic infrared radiation hits an object, the latter absorbs a certain amount of infrared energy. The absorption of infrared energy involves heating the object. Warmer objects emit more infrared radiation than objects of lower temperature. Absorption of infrared radiation emitted is converted into infrared radiation (coming fro [..]

An object that absorbs all the energy of the incident infrared radiation, converts it to its own infrared radiation and fully rejects him. Absolute emissivity of the radiator is unity. For this reason, there is no reflection or transmission of radiation. Objects having the properties of this kind does not exist in nature. Devices for the calibr [..]

The amount of time required for thermal adaptation to the ambient temperature at the site of measurement. Heat stabilized detectors of the same type as in the testo 880 has a relatively short time of stabilization (balancing) the temperature.

The coldest point on the IR image is called a "cold spot", the hottest - the "hot spot". With the function "Auto Hot / Cold Spot," you can display imager these two points. This feature is also available in many software packages, such as Testo IRSoft 2.0. Through this software you can also di [..]

2-point measurement is carried out through two crosshairs on the display of the thermal imager, with the aid of which the individual values ​​of the temperature reading.

The detector receives infrared radiation and converts it into an electrical signal. The size of the detector is specified in pixels.

See the "blackbody"

Almost all of the objects encountered in practice is called "gray bodies" or "real emitters." In contrast to the absolute black bodies, gray bodies would not absorb all incident infrared radiation on them. In this case, part of the incident light is always reflected and some is absorbed by the surface. Thus, t [..]

The lines connecting the points with the same temperature. You can display the isotherms using the software for analysis (for example, Testo IR Soft 2.0). In the course of the isotherms show that all points on the IR image with the values ​​of the temperature within the specified range are allocated the same color.