1.1本试验方法测量操作链锯时为保护下半身（腿）而穿戴的衣服和装置的抗切割性。 1.2本试验方法可用于测试是否符合既定安全标准中的最低性能要求。 1.2.1根据买方和供应商之间的协议，或根据既定安全标准的要求，将决定是否使用本试验方法来确定以下一项或两项:（1）链速50（CS50）和（2）成功/失败（堵塞/链条停止或无切入小于1）。 5秒）。 1.3本试验方法可用于确定既定安全标准中规定的覆盖区域的防护等级。 1.4以国际单位制表示的数值应视为标准值。 注1 — 每个系统中规定的值可能不是精确的等效值；因此，每个系统必须相互独立使用，不得以任何方式组合值。 1.5 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====== 5.1本试验方法的目的是提供有关链锯操作员穿着的不同类型防护服和防护罩的抗切割性水平的可测量性能标准。 5.2本试验方法旨在表明防护服对链锯切割作用的抵抗程度。 5.3根据本试验方法测试的衣服和覆盖物可通过以下方式实现保护:（1）材料与锯链接触时的切割阻力；（2） 拉动部分材料或材料中的纱线，使其被拉入链条和驱动机构，以阻止链条移动；（3） 材料的纤维用于证明高抗切割性和吸收旋转能量的能力，从而可以充分降低链速以停止锯链的移动； 或（4）这些的任何组合。 5.4本试验方法无意评估下半身防护服的舒适性。 5.5如果使用本测试方法进行商业装运验收测试时，由于报告测试结果的差异而产生争议，买方和供应商应进行比较测试，以确定其实验室之间是否存在统计偏差。建议为调查偏差提供称职的统计协助。作为最低要求，双方应从待评估的同一批次部件中抽取一组试样。 然后，应将试样以相同数量随机分配给每个实验室进行测试。如果发现偏差，必须确定并纠正其原因，或者买方和供应商必须同意根据已知偏差解释未来的测试结果。

1.1 This test method measures cut resistance of garments and devices worn to protect the lower body (legs) when operating a chain saw. 1.2 This test method may be used to test for compliance to minimum performance requirements in established safety standards. 1.2.1 By agreement between the purchaser and the supplier, or as required by established safety standards, it will be decided if this test method will be used to determine one or both of the following: (1) chainspeed 50 (CS50), and (2) success/failure (jamming/chain stop or no cut in less than 1.5 seconds) at specified chain speed. 1.3 This test method may be used to determine levels of protection for areas of coverage as stipulated in established safety standards. 1.4 The values stated in SI units are to be regarded as standard. Note 1 — The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way. 1.5 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 ====== 5.1 The purpose of this test method is to provide a measurable criterion of performance about the level of cut resistance provided by different types of protective garments and protected coverings worn by chain saw operators. 5.2 This test method is intended to show to what level a protective garment can offer resistance to the cutting action of a chain saw. 5.3 The protection which can be demonstrated by the garments and coverings tested in accordance with this test method is achieved by: (1) the cut resistance of the material to cutting when put in contact with saw chain; (2) pulling a part of the material or yarns in the material so that they are drawn into the chain and drive mechanism to block the chain movement; (3) the fibers of the materials used to demonstrate both high resistance to cutting and the capacity to absorb rotational energy, so that chain speed can be slowed down sufficiently to stop the movement of the saw chain; or (4) any combination of these. 5.4 This test method does not purport to evaluate comfort of lower body protective garments. 5.5 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should perform comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens from the same lot of components to be evaluated. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. If a bias is found, either its cause must be determined and corrected or the purchaser and the supplier must agree to interpret future test results in light of the known bias.