What does LO mean when the infrared thermometer displays
The infrared thermometer has a temperature range of -50 ℃ to 550 ℃. When LO appears, it means that the detection temperature is below the lower limit, which means that the object you are measuring has a low temperature below -50 ℃! It could also be due to low battery levels.
Error analysis of infrared thermometer
Due to the non-contact nature of infrared thermometers, their measurement results are influenced by many factors. From the perspective of the instrument itself, there are several aspects: using a non isothermal blackbody as a calibration source, differences in instrument emissivity, scaling or wear of air media and instrument lenses, etc; From the perspective of external factors, the measurement results are influenced by factors such as the emissivity of the object being measured, the measurement distance coefficient, and the temperature of the external environment.
Solution to the Error of Infrared Thermometers
In applications, on-site comparison and calibration methods are generally used to minimize these effects. Depending on the actual calibration needs, several calibration temperatures are selected accordingly, and the calibration sequence is from low temperature to high temperature. First, set the emissivity ε=1 of the object for calibration, and then adjust the ε value to make the display temperature consistent with the calibration temperature. Read the indication of ε=1 and the adjusted indication of ε ≥ 1. Repeat reading several times at each calibration point, and then conduct data processing. For thermometers whose indication error and repeatability meet the requirements, mark its s value.
Is an infrared thermometer harmful to the human body
According to discussions and experiments conducted by experts in China, infrared thermometers receive radiation from the human body and are completely passive instruments that do not emit any electromagnetic waves and do not cause any harm to the human body.
The function of the red laser is only to assist in aiming. Please be careful not to aim the laser at the eyes or turn off the laser when measuring the human body.
The principle of an infrared thermometer is based on the Planck and Boltzmann laws. A non-contact infrared thermometer measures the surface temperature of an object by absorbing the infrared energy radiated outward from the human body surface. The infrared probe converts the detected infrared energy into an electrical signal, which is then processed by a circuit and finally converted into a temperature reading.
