意义及用途
5.1 The use of the equipment is intended to cause changes in performance related to the conditions of end use, 包括阳光的影响, 湿气和热量. These exposures may include methods of introducing moisture to the specimen. 暴露并非旨在模拟由当地天气现象（例如大气污染）引起的恶化, 生物攻击, 和盐水暴露. 或者, 曝光可以模拟阳光透过窗玻璃的效果. Often, these exposures will include moisture in the form of humidity.

笔记 2: Please refer to Practice G151 for the complete warning guidelines applicable to all laboratory aging equipment.

5.2 Changes in results may be expected when operating conditions vary within the acceptable limits of this practice. 最后, 除非附有详细说明本节具体操作条件的报告，否则不得提及使用此方法的结果 10.

5.2.1 建议使用类似材料 (控制) 具有已知特性的样品与样品同时暴露，以提供用于比较目的的标准. It is better to use control materials that are known to have relatively poor durability and good performance. 建议在每次测试中对每种评估材料至少进行三次重复，以便对结果进行统计评估

ASTM G152-2021 用于暴露非金属材料的明火碳弧仪器操作的标准实践

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1.1 This practice covers the fundamentals and operating procedures for the use of open flame carbon arcs and water installations and aims to reproduce the weathering effects that occur when materials are exposed to sunlight (directly or through window panes) 和水分 (例如雨或露水) in actual use. 这种做法仅限于获得, 测量, 和控制曝光条件. Some exposure procedures are listed in the appendix; 然而, this practice does not specify the appropriate exposure conditions for the material under test.

笔记 1: Practice G151 describes performance standards for all exposure equipment using laboratory light sources. This practice replaces Practice G23, which describes the very specific design of equipment for carbon arc exposure. The equipment described in Practice G23 is covered by this practice.

1.2 在受控环境条件下, the sample is exposed to filtered open flame carbon arc light. Different filters are described.

ASTM G152-2021 用于暴露非金属材料的明火碳弧仪器操作的标准实践

1.3 Sample preparation and result evaluation are included in the material specific method or specification. 实践 G151 和 ISO 中给出了一般指导 4892-1. More specific information is described in Practice D5870 about methods for determining post-exposure characteristic changes and reporting these results.

1.4 以 SI 单位表示的值应被视为标准值.

1.5 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机制, 健康和环境实践，并在使用前确定监管限制的适用性.

1.5.1 If any ozone is generated by the operation of the light source, 应通过排气系统将其从样品和操作员中除去.

1.6 This practice is technically similar to ISO 4892-4.

1.7 本国际标准基于《关于制定国际标准的原则的决定》中确立的国际公认的标准化原则, 世界贸易组织贸易技术壁垒委员会发布的指南和建议.