1.1 本规程涵盖了使用红外成像辐射计通过衰减介质（如窗口、过滤器或大气）测量样品温度时测量和补偿透射率的程序。 2. 1.2 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.3 这些程序可能涉及在加热或通电设备或两者同时存在的情况下使用设备和材料。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 衰减介质的透射率会导致红外热成像仪使用红外成像辐射计测量样本通过介质的温度时产生误差。 给出了测量和补偿该误差源的三种测试方法。 5.1.1 给出了一种测量衰减介质透射率的方法。 5.1.2 给出了通过具有已知透射率的衰减介质测量具有已知发射率的样品的温度时补偿误差的程序。 5.1.3 给出了当样品温度已知时测量和补偿透射率和发射率误差的程序。 5.2 这些程序可在现场或实验室使用常用材料。 5.3 这些程序可用于任何具有所需计算机功能的红外辐射计。 5.4 透射率值仅根据工艺控制和材料无损评估的程序进行定义。

1.1 This practice covers procedures for measuring and compensating for transmittance when using an infrared imaging radiometer to measure the temperature of a specimen through an attenuating medium, such as a window, filter, or atmosphere. 2 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 These procedures may involve use of equipment and materials in the presence of heated or electrically-energized equipment, or both. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The transmittance of an attenuating medium can cause errors for an infrared thermographer using an infrared imaging radiometer to measure the temperature of a specimen through the medium. Three test methods are given for measuring and compensating for this error source. 5.1.1 A procedure is given for measuring the transmittance of an attenuating medium. 5.1.2 A procedure is given for compensating for errors when measuring the temperature of a specimen having a known emissivity through an attenuating medium with a known transmittance. 5.1.3 A procedure is given for measuring and compensating for transmittance and emissivity errors when the specimen temperature is known. 5.2 These procedures can be used in the field or laboratory using commonly available materials. 5.3 These procedures can be used with any infrared radiometers that have the required computer capabilities. 5.4 The values of transmittance are defined only in terms of the procedure for the purpose of process control and nondestructive evaluation of materials.