1.1本规程涵盖了在外表面暴露于风化条件下安装的任何开窗产品的测试。其旨在测量开窗产品对温度循环的响应，温度变化是通过控制外部（天气侧）的空气温度或将产品暴露于红外辐射或两者引起的。当使用本规程进行测试时，开窗产品暴露于升高和降低的环境空气和表面温度的标准循环中。 规定了用于评估温度循环可能导致的性能变化的试验方法。通过这种做法，在受控实验室设备中模拟了季节和昼夜温度条件。 1.2在本实施规程中，描述了两种试验方法，即试验方法A和试验方法B，用于将开窗产品的外表面暴露于标准温度循环的升高部分。提供两种暴露测试方法的目的是满足门窗行业的两种不同需求。 1.2.1试验方法A使用红外辐射来提高开窗产品的表面温度，并使用放置在试样外表面前面的黑色面板温度传感器来感测温度。黑色面板温度传感器的表面温度升高到高于外部环境空气温度的预设水平。这为基于大气太阳辐射的温度暴露及其对外部建筑材料温度升高的影响提供了更真实的测试。 当周期数较大且结果对场相关性至关重要时，应使用该方法。试验方法A用于比较产品评估。 1.2.2试验方法B使用对流热空气产生的高温来达到外部空气温度设定点。它提供了更严格的测试，因为它将外部空气温度提升到在使用条件下无法达到的水平。这为加速温度暴露循环对开窗产品中使用的某些材料和紧固方法的影响提供了更快速的降解周期。 当温度循环次数必须最小化或结果对场相关性不重要时，使用该方法。试验方法B旨在用于研究和开发目的，而不是用于比较产品评估。 1.3在本规程中，建议每种方法采用三种温度暴露水平:1级为低温暴露，2级为中温暴露，3级为高温暴露。提供三级温度暴露的目的是根据其设计和潜在的地理安装位置，适应不同等级的开窗产品。 其他温度水平可由说明符选择。 1.3.1性能特性测量用于评估温度循环对开窗产品的影响。通过以下测试进行测量: 1.3.1.1应根据试验方法E283测量漏气率。 1.3.1.2应根据试验方法E331或试验方法E547测量水渗透阻力。 1.3.1.3应根据试验方法E330测量结构强度。 只有在规定的情况下，并且只有在温度循环完成后，才能进行该试验。 1.3.2测试规范也可以选择其他测试来表征开窗产品的性能。（建议的附加测试见注释3。） 1.3.3出于产品比较的目的，这些试验在标准实验室条件下或附近进行，但出于研发目的，也可以在温度循环的升高或降低部分进行，以测量极端温度对所评估性能参数的影响。 为了进行比较评估，在 11.2 应使用。 1.4以国际单位制报告的数值应视为标准。括号中报告的单位仅供参考。 1.5使用本规程的测试机构的员工应熟悉传热、流体力学、仪器实践以及规定测试方法的具体要求。测试人员应具备测试门窗系统和组件的一般知识。 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和健康实践，并确定监管限制的适用性。 第6节给出了具体的预防说明。 ====意义和用途====== 5.1当暴露于温差（外部恒定的较高或较低温度，内部恒定的室温）或温度循环（内部相对恒定的室温，外部反复循环较高和较低温度）时，开窗产品，部件上会产生应力，可能导致故障或整体系统性能变化。 其中一些变化可能是暂时的，它们对系统性能的影响仅在周期性温度暴露期间持续。由于关键部件的故障或控制整个系统性能的关键部件中的不可逆变化，其他变化可能更持久。 5.2在本实施规程中，提供了一种程序，用于评估在标准条件下暴露于温度循环对开窗产品的影响。它有助于产品评估和开发。 可以在实验室条件下模拟使用中的极端温度来研究窗户组件之间的相互关系。 5.3在役温度循环和极端温度的实验室近似值是开窗设计师的有用工具。当这些产品在住宅和商业建筑中安装和运行时，这些条件有助于评估设计和组件对整体性能的绝对和相对相互作用。 5.4本规程仅限于温度暴露和温度循环。 温度只是影响开窗产品现场性能的众多环境因素之一。使用不同材料或施工方法制造的产品可能对不同的环境因素表现出特定的敏感性，例如湿度、紫外线辐射或空气中的化学物质。 5.5由于能够测量窗户性能、提供温度循环和提供红外辐射暴露的单个设备的复杂性和成本，可能需要一个以上的测试设备来完成本实践。 如果使用多个试验装置，在将试样从一个装置移动到另一个装置时应小心，以防止其因开裂、扭曲、掉落或其他变形原因而受损。 5.6在本实施规程中，通过使用对流热空气或暴露于红外辐射，使试样经受环境空气温度或表面温度循环条件的各种可能变化之一。因此，结果仅适用于所用的试验方法和条件。 5.7目前，不存在将这种做法与现场表现联系起来的相关数据。

1.1 This practice covers the testing of any fenestration products that are installed with the exterior surface exposed to weathering conditions. It is intended to measure the response of the fenestration product to temperature cycles with the temperature changes being induced by controlling the air temperature on the exterior (weather side) or by exposing the product to infrared radiation, or both. When tested using this practice, fenestration products are exposed to standard cycles of elevated and depressed ambient air and surface temperatures. Test methods are specified for evaluating changes in performance that may occur as a result of temperature cycling. With this practice, seasonal and diurnal temperature conditions are simulated in a controlled laboratory apparatus. 1.2 In this practice, two test methods, Test Method A and Test Method B, are described for exposing the exterior surface of fenestration products to the elevated portion of a standardized temperature cycle. The purpose for providing two test methods of exposure is to address two distinct needs of the fenestration industry. 1.2.1 Test Method A uses infrared radiation to increase the surface temperature of the fenestration product and uses a black panel temperature sensor placed in front of the specimen's exterior surface to sense the temperature. The surface temperature of the black panel temperature sensor is raised to a preset level above the exterior ambient air temperature. This provides a more realistic test for temperature exposure based on atmospheric solar radiation and its effect on the temperature increase of exterior building materials. This method should be used when the number of cycles can be large and the outcome is critical for field correlation. Test Method A is intended for comparative product evaluations. 1.2.2 Test Method B uses elevated temperature produced by convective hot air to achieve the exterior air temperature set-point. It provides a more sever test because it elevates the exterior air temperature to levels that are not obtainable under in-service conditions. This provides a more rapid degradation cycle for accelerating the effects of the temperature exposure cycling on some materials and fastening methods used in fenestration products. This method is intended to be used when the number of temperature cycles must be minimized or the outcome is not critical for field correlation. Test Method B is intended for research and development purposes and not for comparative product evaluations. 1.3 In this practice, three temperature exposure levels are suggested for each method: Level 1 is a low temperature exposure, Level 2 is a moderate temperature exposure, and Level 3 is a high temperature exposure. The purpose of providing three levels of temperature exposure is to accommodate different grades of fenestration products based on their designs and their potential geographic installation locations. Other temperature levels may be selected by the specifier. 1.3.1 Performance characteristic measurements are used to evaluate the effects on the fenestration product caused by temperature cycling. They are measured by the following tests: 1.3.1.1 Air leakage rates shall be measured in accordance with Test Method E283. 1.3.1.2 Water penetration resistance shall be measured in accordance with Test Method E331 or Test Method E547. 1.3.1.3 Structural strength shall be measured in accordance with Test Method E330. This test shall only be performed when specified and only after temperature cycling is completed. 1.3.2 The test specifier may also choose additional tests to characterize fenestration product performance. (See Note 3 for suggested additional tests.) 1.3.3 For the purposes of product comparison, these tests are performed at or near standard laboratory conditions, but for research and development purposes, they may also be performed during an elevated or depressed portion of the temperature cycle in order to measure the effects of the temperature extreme on the performance parameter being evaluated. For the purposes of comparative evaluation, the parameters defined in 11.2 shall be used. 1.4 Values reported in SI units are to be regarded as the standard. The units reported in parentheses are for information only. 1.5 Testing organizations using this practice shall have staff knowledgeable in heat transfer, fluid mechanics, instrumentation practice, and the specific requirements for the test methods specified. Testing personnel shall have a general knowledge of fenestration systems and components being tested. 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 6. ====== Significance And Use ====== 5.1 Fenestration products, when exposed to differential temperatures (constant higher or lower temperatures on the exterior and room temperature on the interior) or temperature cycling (relatively constant room temperature on the interior and repeated cycling of higher and lower temperatures on the exterior), will have stresses induced on components that may cause failure or changes in overall system performance. Some of these changes may be temporary, with their effects on system performance lasting only during the cyclical temperature exposure. Other changes may be more permanent because of the failure of critical components or irreversible changes in those critical components that control overall system performance. 5.2 In this practice, a procedure is provided for evaluating the effects of exposure to temperature cycling at standardized conditions on fenestration products. It is useful for product evaluation and development. Interrelationships between window components can be studied under laboratory conditions simulating in-service temperature extremes. 5.3 Laboratory approximation of in-service temperature cycling and temperature extremes is a useful tool for the fenestration designer. These conditions help in evaluating designs and components for absolute and relative interactions on overall performance when these products are installed and functioning in residential and commercial buildings. 5.4 This practice is limited to temperature exposure and temperature cycling only. Temperature is only one of many environmental factors that affect field performance of fenestration products. Products made with different materials or construction methods may show specific sensitivity to different environmental factors, such as humidity, ultraviolet radiation, or airborne chemicals. 5.5 Because of the complexity and cost of a single apparatus capable of measuring window performance, providing temperature cycling, and providing infrared radiation exposure, more than one test apparatus may be required to complete this practice. If multiple test apparatus are used, care shall be taken when moving the specimen from one apparatus to another to protect them from damage by racking, twisting, dropping, or other causes of distortion. 5.6 In this practice, specimens are subjected to one of a variety of possible variations of ambient air temperature or surface temperature cycling conditions by using either convective hot air or exposure to infrared radiation. Therefore, the results are valid only for the test method and conditions used. 5.7 At present, no correlation data exists that relates this practice to field performance.