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    Home > Active Ingredient News > Drugs Articles > An introduction to the factors influencing the measurement accuracy of infrared thermometer

    An introduction to the factors influencing the measurement accuracy of infrared thermometer

    • Last Update: 2019-09-03
    • Source: Internet
    • Author: User
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    The instrument should be used in strict accordance with the environmental temperature indicated in the technical indicators of the instrument When the ambient temperature is high, air-cooled, water-cooled device or thermal protection sleeve can be used, and the thermal protection sleeve can make the instrument operate normally in the environment of up to 200 ℃ When the hand-held thermometer is used from one environment to another, the accuracy of the instrument will be temporarily reduced In order to obtain ideal temperature measurement results, the instrument should be placed on the work site for a period of time (30 minutes is recommended) so that the temperature of the instrument and the ambient temperature can reach a balance before use Air quality factors smoke, dust and other pollutants in the air as well as unclean lenses will make the instrument unable to receive enough infrared energy to meet the measurement accuracy, and the measurement error of the instrument will increase Therefore, always keep the lens clean, and the air blower helps keep the lens free from contamination Electromagnetic interference factor instruments should be as far away from potential electrical interference sources as possible, such as electric equipment with large load change Shield wire shall be used for output and input connection of on-line instrument and ensure good grounding of shield wire In strong interference environment, rigid conduit is better than flexible conduit when external protection conduit is used Do not lead the AC power of other equipment into the same conduit Environmental factors when there are other high temperature objects, light sources or solar radiation around the measured object, these radiation will directly or indirectly enter the measurement optical path, resulting in measurement errors In order to overcome the influence of environmental radiation, first of all, it is necessary to avoid environmental radiation directly entering the optical path, and try to make the measured object full of the instrument field of view For the indirect interference of environmental radiation, the method of shielding can be used to eliminate it In order to ensure the accuracy of measurement, the instrument should try to measure along the normal direction of the measured object surface (perpendicular to the measured object surface) If it can't be ensured that it is in the normal direction, it should also be measured within 45 ° angle with the normal direction, otherwise the instrument display value will be low.
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