1.1 本试验方法描述了确定密封中空玻璃装置空气空间内霜/露点的现场或实验室程序，并建立了确定该点是否低于或高于给定或规定温度的标准。 1.2 本试验方法还描述了用于这些测定的仪器。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 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。 有关具体的危险说明，请参阅 9.1.3 和 9.3.8 . 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《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 本试验方法适用于在实际或模拟的使用条件下使用；也就是说，装置的一侧暴露在室温下，而另一侧暴露在自然或模拟天气条件下。如果玻璃条件和24小时历史与之前的条件不同或发生变化，则霜冻/露点可能无法与之前的测量值进行比较。 5.2 本试验方法适用于密封中空玻璃单元的未涂覆或未经镀膜的透明玻璃。如果本设备与涂层或薄膜玻璃一起使用，玻璃表面的涂层或薄膜可能会损坏。 5.3 如果中空玻璃装置未处于真正的垂直位置，则可能需要对本试验方法进行微小修改，以保持霜冻/露点仪的测量表面与玻璃接触。

1.1 This test method describes a field or laboratory procedure for determining the frost/dew point within the air space(s) of sealed insulating glass units and establishes the criteria for determining whether that point is below or above a given or specified temperature. 1.2 This test method also describes the apparatus to be used for these determinations. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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. For specific hazard statements, see 9.1.3 and 9.3.8 . 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 This test method is suitable for use under actual or simulated in-service conditions; that is, one side of the unit is exposed to room temperature, while the other side is exposed to natural or simulated weather conditions. Where the glazing conditions and the 24 h history are different or changed from previous conditions, the frost/dew point may not be comparable to a previous measurement. 5.2 This test method is applicable for the uncoated or unfilmed clear (transparent) glass lite of sealed insulating glass units. If this apparatus is used with coated or filmed glass lite, the coating or film on the surface of glass lite may be damaged. 5.3 This test method may require minor modifications to keep the measuring surface of the frost/dew-point apparatus in contact with the glass if the insulating glass unit is not in the true vertical position.