1. First, adjust the emissivity.
2. Align the measured value vertically with the exposed skin of the person being measured. The exposed skin is larger than the lens of the thermometer. If the measurement surface is too small, it will affect the measurement accuracy.
3. The optical systems of thermometers from various manufacturers are very different. The distance of the measured object has a great influence on the measured temperature. Pay attention to the distance coefficient on the thermometer's manual, do not be too far away from the measured person, otherwise it will also affect the measurement accuracy.