Pusnik Igor, Simpson Rob, Drnovsek Janko
University of Ljubljana, Faculty of Electrical Engineering, Laboratory of Metrology and Quality, Trzaska 25, 1000 Ljubljana, Slovenia.
Physiol Meas. 2004 Oct;25(5):1239-47. doi: 10.1088/0967-3334/25/5/013.
The paper describes the comparison method and analyses the results of comparison in terms of agreement between the blackbody of the National Physical Laboratory (NPL), United Kingdom and four different blackbody cavities of the Laboratory of Metrology and Quality (LMK), at the University of Ljubljana, Faculty of Electrical Engineering (FE), Slovenia. Three cavity shapes are suggested in different standards as suitable for calibration of infrared ear thermometers (IRETs), while one cavity shape was proposed by the LMK. The agreement between blackbody cavities was determined with the help of platinum resistance thermometers. Two reference IRETs were used to check their stability and level of agreement between calibration results at different institutes and against different blackbody cavities. Measurements were performed with two IRETs, at the NPL in one cavity and at the LMK in four different cavities. The comparison was initiated to solve the problem of assuring proper traceability for IRETs and to present the solution to their users.
本文描述了比较方法，并根据英国国家物理实验室（NPL）的黑体与斯洛文尼亚卢布尔雅那大学电气工程学院（FE）计量与质量实验室（LMK）的四个不同黑体腔之间的一致性，对比较结果进行了分析。不同标准中建议了三种腔体形状适用于红外耳温计（IRET）的校准，而LMK提出了一种腔体形状。借助铂电阻温度计确定了黑体腔之间的一致性。使用两台参考IRET来检查它们的稳定性以及不同机构之间针对不同黑体腔的校准结果的一致程度。使用两台IRET进行测量，一台在NPL的一个腔体中，另一台在LMK的四个不同腔体中。开展此次比较是为了解决确保IRET正确溯源的问题，并向其用户展示解决方案。
