DESARROLLO E IMPLEMENTACIÓN DE UN SISTEMA DE CALIBRACIÓN DE TERMÓMETROS CLÍNICOS INFRARROJOS DE OÍDO
DEVELOPMENT AND IMPLEMENTATION OF A CALIBRATION SYSTEM FOR CLINICAL INFRARED EAR THERMOMETERS
DOI:
https://doi.org/10.15446/mo.n60.79074Keywords:
Cuerpo negro, termómetro de oído, radiación térmica, calibración, metrología (es)Black body, ear thermometer, thermal radiation, calibration, metrology (en)
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En este trabajo se presenta el proceso de construcción e implementación de un sistema de calibración de termómetros clínicos de oído en el Laboratorio de Temperatura y Humedad del Grupo de Área Técnica 3 de la Subdirección de Metrología Física del Instituto Nacional de Metrología de Colombia, INM, usando una cavidad de cuerpo negro y un termómetro de contacto como patrones de medida. Como parte de la implementación y evaluación de la reproducibilidad del método de medición se diseñó un experimento basado en 54 mediciones independientes llevadas a cabo por tres operarios diferente a tres temperaturas (35 °C, 37 °C y 40 °C), con 6 réplicas por cada nivel. El análisis estadístico de las medias reveló una fuerte dependencia de la corrección en función de la temperatura, mientras que entre operarios no se evidenció una diferencia significativa, lo cual permitió concluir que el método implementado es reproducible. La incertidumbre de medición del sistema de medición fue de ± 0.14 °C, éste valor puede ser disminuido empleando un termómetro de referencia de mejor incertidumbre instrumental.
This work presents the process of construction and implementation of a calibration system for clinical ear thermometers at the Temperatura and Humidity Laboratory of the Physical Subdivision of the Instituto Nacional de Metrología, INM, using a blackbody cavity and a contact thermometer as measurement standards. As part of the implementation and method confirmation, an experiment was designed based on 54 independent measurements carried out by three different operators at three different temperatures (35 °C, 37 °C and 41 °C), with 6 replicates for each level. The statistical analysis of the means revealed a strong dependence of the correction as a function of temperature, whilst a significant difference amongst operators was not evident, this fact prompted the conclusion that the implemented method is reproducible. The measurement uncertainty of the system was ± 0.14 °C, this value can be diminished by employing a standard thermometer with a better instrumental uncertainty.
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1. Efrem Kebede Ejigu. (2021). Accurate Clinical Tympanic Thermometer Measurement System at NMISA. NCSL International measure, 13(2), p.36. https://doi.org/10.51843/measure.13.2.5.
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