POS= position error, pay attention to whether the position of the probe is correct and stable.
You can reset the earmuffs, reposition the earmuffs, and then press the start button to measure again.
Extended data:
Ear thermometer is a non-contact telemetering and temperature measuring instrument (although it may be less than one centimeter).
It determines the body temperature by detecting the infrared spectrum emitted by the tympanic membrane (equivalent to the inferior colliculus). According to the theory of blackbody radiation, the infrared spectra produced by objects with different temperatures are different. It is displayed by thermopile infrared detector with an accuracy of 0.65438 0℃, and then the reading is converted by microcomputer.
There is a place deep in the brain called the inferior colliculus, which contains a "set point" structure that controls the body's constant temperature. The inferior colliculus is also the center of human body temperature.
When the human body has a fever, it is the result of receiving some inflammatory chemicals circulating in the blood stream at a fixed point, so the hypothalamus is the place where the human body temperature rises at the earliest, and the blood flow supplying the eardrum and the hypothalamus happen to have traffic, so it is most appropriate to reflect the human body temperature with the eardrum temperature, and the eardrum is also the place where whether the human body has a fever can be detected at the earliest.
References:
Ear temperature gun-Baidu encyclopedia