1.1 本规范涵盖了实验室中使用的重量和质量标准，特别是000、00、0、1、2、3、4、5、6和7级。本规范取代了已绝版的国家标准局第547号通告第1节。 1.2 本规范和校准方法适用于重量制造商、国家计量机构、重量校准实验室、认证机构、重量使用者和监管机构。 1.3 本规范包含所用砝码的主要物理特性和计量要求。 1.3.1 用于称重仪器的检定； 1.3.2 用于校准精度等级较低的砝码；和 1.3.3 配有称重仪器。 1.4 描述了每个类别的最大允许误差（以前的公差）和设计限制，以便为适当的应用选择单独的重量或重量组。 1.5 砝码制造商必须能够提供证据证明所有新砝码符合本标准中的规范（例如，材料、密度、磁性、表面光洁度、质量值、不确定性），以声称符合规范E617、最大允许误差、重量等级或计量可追溯性。 1.5.1 在随后的校准过程中，校准实验室必须满足ISO/IEC 17025:2017的要求。 1.5.2 后续校准必须满足所有要求，包括第节 7. ， 8. 和 9 ，表8和表11（环境参数），以声明符合规范 E617 ，最大允许误差、重量等级或计量可追溯性。 注1: NIST IR 6969和NIST IR 5672中规定的要求符合规范E617第节的所有要求 7. ， 8. 和 9 。 1.6 以国际单位制表示的数值应视为标准。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers weights and mass standards used in laboratories, specifically classes 000, 00, 0, 1, 2, 3, 4, 5, 6, and 7. This specification replaces National Bureau of Standards Circular 547, Section 1, which is out of print. 1.2 This specification and calibration method is intended for use by weight manufacturers, national metrology institutes, weight calibration laboratories, accreditation bodies, users of weights, and regulatory bodies. 1.3 This specification contains the principal physical characteristics and metrological requirements for weights that are used. 1.3.1 For the verification of weighing instruments; 1.3.2 For the calibration of weights of a lower class of accuracy; and 1.3.3 With weighing instruments. 1.4 Maximum Permissible Errors (formerly tolerances) and design restrictions for each class are described in order that both individual weights or sets of weights can be chosen for appropriate applications. 1.5 Weight manufacturers must be able to provide evidence that all new weights comply with specifications in this standard (for example, material, density, magnetism, surface finish, mass values, uncertainties) to make any claim of compliance to Specification E617, Maximum Permissible Errors, weight classes, or metrological traceability. 1.5.1 During subsequent calibrations, calibration laboratories must meet the requirements of ISO/IEC 17025:2017. 1.5.2 Subsequent calibrations must meet all the requirements, including Sections 7 , 8 , and 9 , Table 8 and Table 11 (environmental parameters) to make any claim of compliance to Specification E617 , Maximum Permissible Errors, weight classes, or metrological traceability. Note 1: Requirements set forth in NIST IR 6969 and NIST IR 5672 are compliant with all the requirements of Specification E617, Sections 7 , 8 , and 9 . 1.6 The values stated in SI units are to be regarded as standard. 1.7 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.