Analyze the precautions for using infrared thermometers
In order to measure temperature, align the instrument with the object to be measured, press the trigger to read the temperature data on the instrument's LCD, and ensure that the ratio of distance to spot size and field of view are arranged properly. Attention should be paid to the following issues when using high-speed infrared thermometers:
1. Only measuring surface temperature, infrared thermometers cannot measure internal temperature.
2. The wavelength above 5um cannot be measured through quartz glass, which has special reflection and transmission characteristics and does not allow infrared temperature readings. But temperature can be measured through an infrared window. Infrared thermometers are not suitable for measuring temperature on bright or polished metal surfaces (such as stainless steel, aluminum, etc.).
3. To locate hotspots, the instrument aims at the target and then performs up and down scanning movements on the target until the hotspot is determined.
4. Pay attention to environmental conditions such as steam, dust, smoke, etc. It blocks the optical system of the instrument and affects temperature measurement.
5. If the thermometer is suddenly exposed to an ambient temperature difference of 20 ℃ or higher, it is allowed to adjust to the new ambient temperature within 20 minutes.
6. It is necessary to accurately determine the emissivity of the object being tested.
7. Avoid the influence of high-temperature objects in the surrounding environment.
8. For transparent materials, the ambient temperature should be lower than the temperature of the object being measured.
9. The infrared thermometer should be vertically aligned with the surface of the object being measured, and under no circumstances should the angle exceed 30 degrees.
10. It cannot be used for temperature measurement on shiny or polished metal surfaces, and cannot be measured through glass.
