意义及用途
4.1 The ability of plastic materials to resist deterioration of electrical, mechanical and optical properties due to exposure to light, heat and water is important for many applications. This practice is designed to cause changes in properties related to end-use conditions, 包括日光的影响, 水分, 和热量. The exposures used in this practice are not intended to simulate deterioration caused by local weather phenomena, such as atmospheric pollution, biological attacks, and salt water exposure.
4.2 笔记 – 当操作条件在本实践可接受的范围内变化时，结果可能会发生变化. 当使用摆杆 Sunny 测试仪测量涂层厚度时, 所有提及使用这种做法的地方都需要附有根据第 1 节准备的报告 9 描述所使用的具体操作条件. 有关适用于使用根据此做法获得的结果的预防措施的更多信息, 参见练习 G151.
笔记 2: 有关可变性来源和解决设计可变性的策略的更多信息, 执行, and data analysis of laboratory accelerated exposure tests, 参见指南 G141.
ASTM D2565-2016 “户外塑料氙弧曝露试验方法”
4.3 在根据材料的性能等级与其他材料或对照品相比评估材料的稳定性时，实验室之间测试结果的再现性已被证明是良好的. 6,7 当使用摆杆 Sunny 测试仪测量涂层厚度时, 强烈建议暴露具有已知特性的类似材料 (控制) 与测试材料同时. The number of samples of the control material is recommended to be the same as the number of samples used to test the material. 建议每种材料至少重复三次，以便对结果进行统计评估.
4.4 测试结果将取决于按照实践 G155 操作设备的谨慎程度. 重要因素包括线路电压的调节, 没有盐或其他水沉积物, 温湿度控制, 以及灯和过滤器的状况和寿命.
半径
1.1 This procedure covers specific procedures and test conditions applicable to xenon arc exposure to plastics in accordance with G151 and G155 practices. The practice also includes the preparation of the sample, the test conditions suitable for the plastic, and the evaluation of the test results.
1.2 以 SI 单位表示的值应视为标准值. The values given in parentheses are mathematical conversions of inch-pound units and are for informational purposes only and are not considered standard.
1.3 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全和健康实践，并在使用前确定监管限制的适用性.
笔记 1: This practice covers the same topics as ISO 4892-2, but the technical content is different.