1.1本试验方法涵盖了使用Sirolan激光扫描测定羊毛和其他各种形式动物纤维的平均纤维直径和纤维直径变化的程序。 1.2以国际单位制表示的数值应视为标准。 1.3 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。 ====意义和用途====== 由于目前对实验室间精度的估计是可以接受的，因此本试验方法被认为是令人满意的，适用于原棉和棉条形式的羊毛和其他动物纤维的商业装运验收试验。如果在使用本测试方法进行验收测试时，由于买方和供应商报告的数值差异而产生分歧，则测试方法 D2130 应作为裁判方法。 本试验方法可用于确定是否符合平均纤维直径和直径变化，以在确定装运是否符合规范中给出的材料规范时指定等级 D2252 , D2816 , D3991 和 D3992 . 本试验方法和IWTO-12中提供的测定平均纤维直径和纤维直径标准偏差的程序基本一致。

1.1 This test method covers a procedure, using the Sirolan-Laserscan, for the determination of the average fiber diameter and the fiber diameter variation in wool and other animal fibers in their various forms. 1.2 The values stated in SI units are to be regarded as the standard. 1.3 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. ====== Significance And Use ====== This test method is considered satisfactory for acceptance testing of commercial shipments of wool and other animal fibers in raw and sliver form because current estimates of between-laboratory precision are acceptable. In cases of disagreement arising from differences in values reported by the purchaser and the supplier when using this test method for acceptance testing, Test Method D2130 shall be used as a referee method. This test method may be used for determining compliance with average fiber diameter and diameter variation to assign grades when determining conformance of shipments to material specifications given in Specifications D2252 , D2816 , D3991 , and D3992 . The procedures for determining mean fiber diameter and standard deviation of fiber diameter provided in this test method and in IWTO-12 are in essential agreement.