1.1 本试验方法包括通过水蒸气在冷却表面上的冷凝来测定环境空气的热力学露点或冰点温度。为简便起见，本试验方法将其称为冷凝温度。 1.2 本试验方法适用于冷凝温度范围为60°C至 −70°C。 1.3 本试验方法包括仪器和操作程序的一般说明，包括用于获得测量值的场地选择，以及用于计算结果的程序说明。 1.4 本试验方法适用于在固定平台上连续测量自然大气中的环境湿度。 1.5 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 有关具体的预防说明，请参阅第节 8. . 1.7 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《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 湿度信息对于理解大气现象和工业过程非常重要。露点测量和相关蒸汽压计算对于量化湿度信息非常重要。

1.1 This test method covers the determination of the thermodynamic dew- or frost-point temperature of ambient air by the condensation of water vapor on a cooled surface. For brevity, this is referred to in this test method as the condensation temperature. 1.2 This test method is applicable for the range of condensation temperatures from 60°C to −70°C. 1.3 This test method includes a general description of the instrumentation and operational procedures, including site selection, to be used for obtaining the measurements and a description of the procedures to be used for calculating the results. 1.4 This test method is applicable for the continuous measurement of ambient humidity in the natural atmosphere on a stationary platform. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. For specific precautionary statements, see Section 8 . 1.7 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 Humidity information is important for the understanding of atmospheric phenomena and industrial processes. Measurements of the dew-point and calculations of related vapor pressures are important to quantify the humidity information.