1.1 本试验方法是验收试验筛的性能试验。 1.2 该试验方法使用已知数量的参考材料将E11试验筛的性能与检查或校准试验筛进行比较，以便可以测量试验筛的长期稳定性。 1.3 这是一种检查测试筛准确性和长期可靠性的测试方法。由于无法调整测试筛的测量能力，因此该测试方法旨在通过与标准参考进行比较，提供基于筛分性能的验证程序。根据规范，本试验方法不作为检验方法的替代方法 E11 或中的程序 MNL 32 . 1.4 单位 -以国际单位制表示的数值应视为标准值。给出的附加值仅供参考，不被视为标准值。 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、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 该试验方法可供生产商、用户和一般利益方用于研究和开发或生产质量控制工作，并可用于比较试验筛。 4.2 由于标准物质的粒径分布将影响验收公差，用户应根据其特定的标准物质确定验收公差。

1.1 This test method is a performance test for acceptance of test sieves. 1.2 This test method compares the performance of an E11 test sieve against an inspection or calibration test sieve using a known quantity of reference material such that the long-term stability of test sieves can be measured. 1.3 This is a test method for checking the accuracy and long-term reliability of test sieves. Since it is not possible to adjust the measuring capability of a test sieve, the test method is designed to offer a verification procedure based on sieving performance by comparison to a standard reference. This test method is not proposed as an alternative to the inspection methods in accordance with Specification E11 or the procedures in MNL 32 . 1.4 Units —The values stated in SI units are to be regarded as standard. The additional values given are included for information only and are not considered standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This test method may be used by producers, users, and general interest parties for research and development or production quality control work, and is useful for the comparison of test sieves. 4.2 Because the reference material’s particle size distribution will affect the acceptance tolerance, the user should determine an acceptance tolerance based on their specific reference material.