1.1使用太阳作为光源的菲涅耳反射集中器用于非金属材料的加速室外暴露试验。 1.2本规程涵盖了使用菲涅耳反射镜加速室外老化试验机对非金属材料进行加速室外暴露试验的程序。本文描述了仪器（见和）和指南，以最小化室外加速暴露试验期间遇到的变量。 1.3本规程未规定最适合待测试材料的暴露条件，但仅限于获取、测量和控制暴露程序和某些条件的方法。特定材料的现有方法或规范涵盖了样品制备、测试条件和结果评估。 1.4所述菲涅耳反射器加速室外暴露试验机可能适用于测定暴露在阳光、热量和水分下的材料的相对耐久性，前提是控制材料加速因子速率的化学或物理变化或两者的机制没有显著差异。 1.5本规程建立了统一的样品安装和测试维护程序。实践中还包括机器和菲涅耳反射镜的维护标准规定，以确保清洁度和耐用性。 1.6本规程适用于尺寸符合中所述目标板尺寸的试样。 1.7对于当前使用的试验机，本规程不适用于超过13 mm（1/2 in.）的试样。 )因为冷却可能有问题。 1.8以国际单位制表示的数值应视为标准。括号中的英寸-磅单位仅供参考。 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。

1.1 Fresnel-reflecting concentrators using the sun as source are utilized in the accelerated outdoor exposure testing of nonmetallic materials. 1.2 This practice covers a procedure for performing accelerated outdoor exposure testing of nonmetallic materials using a Fresnel-reflector accelerated outdoor weathering test machine. The apparatus (see and ) and guidelines are described herein to minimize the variables encountered during outdoor accelerated exposure testing. 1.3 This practice does not specify the exposure conditions best suited for the materials to be tested but is limited to the method of obtaining, measuring, and controlling the procedures and certain conditions of the exposure. Sample preparation, test conditions, and evaluation of results are covered in existing methods or specifications for specific materials. 1.4 The Fresnel-reflector accelerated outdoor exposure test machines described may be suitable for the determination of the relative durability of materials exposed to sunlight, heat, and moisture, provided the mechanisms of chemical or physical change, or both, which control the rates of acceleration factors for the materials do not differ significantly. 1.5 This practice establishes uniform sample mounting and in-test maintenance procedures. Also included in the practice are standard provisions for maintenance of the machine and Fresnel-reflector mirrors to ensure cleanliness and durability. 1.6 This practice shall apply to specimens whose size meets the dimensions of the target board as described in. 1.7 For test machines currently in use, this practice may not apply to specimens exceeding 13 mm (1/2 in.) in thickness because cooling may be questionable. 1.8 Values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses are provided for information only. 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.