Introduction to the reasons for inaccurate measurement of infrared thermometers
1. Infrared thermometers generally use a blackbody scale (emissivity=1.00), but in reality, the emissivity of a substance is less than 1.00. Therefore, when measuring the true temperature of a target, the emissivity value must be set. The emissivity of materials can be found in "Data on Object Emissivity in Radiation Thermometry".
2. Infrared thermometers cannot measure temperature through glass. Glass has special reflection and transmission characteristics, so infrared temperature measurement is not allowed. But temperature can be measured through an infrared window. Infrared thermometers should not be used to measure the temperature of bright or polished metal surfaces (such as stainless steel, aluminum, etc.)
Thirdly, target measurement under strong light background
If the target being measured has bright background light (especially sunlight or strong light), it will affect the accuracy of the measurement. Therefore, objects can be used to block the strong light directly shining on the target to eliminate the interference of background light.
Fourth, other reasons
1. Only measuring surface temperature, infrared thermometers cannot measure internal temperature. Environmental temperature. If the thermometer is suddenly exposed to an ambient temperature difference of 20 or higher, the instrument can be adjusted to the new ambient temperature within 20 minutes.
2. Steam, dust, smoke, etc. It will block the optical system of the instrument and affect temperature measurement. To avoid damaging the infrared thermometer, please use compressed air to remove large particles and dust, and then wipe it with a cloth. Gently wipe the thermometer body with a clean, slightly damp cloth. If necessary, soak the fabric in water and a small amount of mild soap. Additionally, please place the infrared thermometer on the lens cover and store it in the carrying case as soon as possible after use.
