工业及过程测量变送器的参考条件与测试程序 第2部分：压力变送器的特定程序

[中文适用范围]： IEC 62828-2:2026 RLV 包含国际电工委员会（IEC）的官方国际标准及其修订对照版本。修订对照版本仅提供英文版，便于用户快速、便捷地比对官方标准与其前一版本之间的所有变更。IEC 62828-2:2026 针对用于工业过程及机械设备测量与控制系统中的压力过程测量变送器（PMT）确立了具体的测试程序。压力 PMT 可采用远传密封装置，将过程变量传递至 PMT 的敏感元件；若该远传密封装置无法与 PMT 分离，则需对整套装置进行测试。关于通用测试程序，请参考适用于所有类型过程测量变送器的 IEC 62828-1。注：在工业及过程应用中，为指代过程测量变送器，也常使用“工业变送器”或“过程变送器”等术语。本第二版于 2017 年发布的第一版予以废止和替代。本版本构成技术修订版，相较于前一版主要包含以下技术变更：a) 按最新 IEC 规则进行的修订；b) 与 IEC 62828-1 通用部分的对比；c) “术语和定义”章节的补充及更精确的定义；d) 修正测量误差计算公式；e) 对长期漂移的表述更加精确；f) 增加补充测试项目；g) 将 IEC 62828-1 中的附录“4 至 20 mA PMT 信号电流范围示例”转移至本版；h) 新增附录 C“压力变送器主要特性”。 [外文原描述]： IEC 62828-2:2026 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 62828-2:2026 establishes specific procedures for testing pressure process measurement transmitters (PMT) used in measuring and control systems for industrial processes and for machinery. A pressure PMT can feature a remote seal to bring the process variable to the sensing element in the PMT. When the remote seal cannot be separated from the PMT, the complete device is tested. For general test procedures, reference is made to IEC 62828-1, which is applicable to all types of process measurement transmitters. NOTE In industrial and process applications, to indicate the process measurement transmitters, it is common also to use the terms "industrial transmitters", or "process transmitters". This second edition cancels and replaces the first edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) revision according to the latest IEC rules; b) comparison with the general part of IEC 62828-1; c) additions and more precise definitions in the “Terms and definitions” clause; d) correction of the calculation formulas for the measurement error; e) more precise formulation of long-term drift; f) extension of additional tests; g) transfer of the annex “Example of signal current range for a 4 to 20 mA PMT” in IEC 62828-1; h) new Annex C “Main characteristics for pressure transmitters”.