What exactly is the infrared technology of portable infrared thermometers?
Infrared technology for portable infrared thermometers;
An unobjectionable understanding of its principles and its thermometry. When the temperature is measured by an infrared thermometer, the infrared energy emitted by the object being measured is converted into an electrical signal on the detector through the optical system of the infrared thermometer. The temperature reading of the signal is displayed. Several factors determine the accuracy of the measurement. Temperature is an important factor, the most important factors are emissivity, field of view, distance to the spot and the position of the spot. Emissivity, all objects will reflect, transmit and emit energy, and only the emitted energy can indicate the temperature of the object.
Portable infrared thermometers receive all three types of energy when they measure surface temperature. Therefore, all infrared thermometers must be adjusted to read only the emitted energy. Measurement errors are often caused by infrared energy reflected from other light sources. Some infrared thermometers can vary the emissivity, and emissivity values for a variety of materials can be found in published emissivity tables. Other instruments have a fixed emissivity preset of 0.95. This emissivity value is the surface temperature of most organic materials, paints or oxidized surfaces and must be compensated by applying a tape or flat black paint to the surface being measured.
When the tape or paint reaches the same temperature as the base material, measure the temperature of the tape or paint surface to determine its true temperature. The ratio of distance to light spot. The optical system of the infrared thermometer collects energy from the circular measurement spot and focuses it on the detector. The optical resolution is defined as the ratio of the distance from the infrared thermometer to the object and the size of the measured light spot (D :S). The larger the ratio, the better the resolution of the infrared thermometer and the smaller the measured spot size. Laser aiming is only used to help aim at the measurement point. The latest improvement in infrared optics is the addition of a close focus feature, which provides accurate measurement of small target areas and also prevents the effects of background temperature.
Field of view, make sure the target is larger than the spot size of the infrared thermometer when measuring. The smaller the target, the closer you should be to it. When accuracy is particularly important, make sure the target is at least 2 times the spot size.
