1.1 本规范涵盖了玻璃体积测量仪的通用要求。本规范中引用的其他规范中给出了适用仪器的具体尺寸和公差。玻璃必须符合规范 E438 并按照惯例进行校准 E542 . 1.1.1 A类-- 每个仪器都应标有字母 A. 以表示符合适用的结构和精度要求。制造商可选择在仪器上标记识别标记（序列号）。 1.1.2 B类-- 通用仪表的基本设计与A类仪表相同。但是，除非另有规定，否则B类仪表的体积公差应在A类仪表规定范围的两倍以内。 1.2 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 general requirements common to glass volumetric apparatus. Specific dimensions and tolerances for applicable instruments are given in other specifications as cited throughout this specification. Glass must conform to Specifications E438 and be calibrated in accordance with Practice E542 . 1.1.1 Class A— Each instrument shall be marked with the letter A to signify compliance with applicable construction and accuracy requirements. Instruments may be marked with an identification marker (serial number) at the option of the manufacturer. 1.1.2 Class B— General purpose instruments are of the same basic design as Class A. However, volumetric tolerances for Class B instruments shall be within twice the specified range allowed for Class A unless otherwise specified. 1.2 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.