The forehead temperature gun is always inaccurate. What happened?

1) The unit of measurement is set incorrectly: the mode and unit of measurement of the forehead temperature gun. Some forehead temperature guns have two functions: body surface temperature and body temperature, even if you choose the wrong mode. The unit of measurement should be degrees Celsius, not degrees Fahrenheit. The difference in quantity between the two can be described as a world of difference.

2) External factors: accurate temperature measurement needs to exclude the following external interference factors, such as measuring air, water vapor and other obstructions in the environment, which will change the radiation curve of the object and lead to inaccurate temperature measurement. It is necessary to ensure that the optical system of the thermometer is partially clean, free from dust, water vapor and other influences, and free from sweat, hair, dust, hats and other sundries on the forehead and ear canal of the subject. At the same time, temperature measurement needs a windless indoor environment, and it also needs to ensure that there is no large temperature difference during the use of the instrument to ensure the normal working environment of the instrument (higher than 16℃). If the outdoor weather is cold, the temperature measured by the thermometer has no reference value and belongs to abnormal work.

3) Instrument damage: If the forehead temperature gun is dropped or damaged, it will also lead to the phenomenon of old inaccuracy in use and measurement. At this time, you should buy a new forehead temperature gun and replace the measurement.