工业和过程测量变送器测试的参考条件和程序 第2部分：压力变送器的特定程序

[中文适用范围]： IEC 62828-2:2026 确立了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）的特定测试程序。压力 PMT 可采用远传密封方式，将过程变量传递至变送器内的敏感元件。若远传密封件无法与 PMT 分离，则应对整个装置进行测试。一般测试程序参考适用于所有类型过程测量变送器的 IEC 62828-1 标准。 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 年首次发布版本予以撤销并取代。本版本属于技术性修订，相较于前一版本，主要技术变更包括：a) 依据最新 IEC 规则进行修订；b) 与 IEC 62828-1 通用部分进行对比；c) 在“术语和定义”条款中增加内容并细化定义；d) 修正测量误差的计算公式；e) 更精确地表述长期漂移特性；f) 增加补充测试项目；g) 将 IEC 62828-1 中的附件“4 至 20 mA 型 PMT 信号电流范围示例”转移至此标准；h) 新增附件 C“压力变送器主要特性”。 [外文原描述]： 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”.