无损检测仪器  携带式工业X射线探伤机 Non-destructive testing instruments— Portable industrial X-ray radiographic equipment  ICS  19.100 CCS  N 78   中华人民共和国国家标准 GB/T 26838—2024 代替 GB/T 26838—2011 2024-08-2 3发布 2025-03-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     产品分类   ······························································································   1      4.1     产品型号   ·························································································   1      4.2     主要技术参数   ····················································································   2 5     技术要求   ······························································································   2      5.1     使用条件   ·························································································   2      5.2     使用性能   ·························································································   2      5.3     稳定性   ···························································································   4      5.4     辐射防护与安全   ·················································································   4      5.5     外观要求   ·························································································   4 6     试验方法   ······························································································   4      6.1     试验条件   ·························································································   4      6.2     试验用主要仪器仪表和器具   ·····································································   5      6.3     穿透力测定   ······················································································   5      6.4     相对灵敏度测定   ·················································································   7      6.5     射线辐射角和辐射场均匀性测定   ································································   7      6.6     周向X射线机射线辐射角测定   ··································································   9      6.7     计时器误差测定   ·················································································   9      6.8     管电压误差测定   ·················································································   9      6.9     管电压调节装置测定   ···········································································   10      6.10     过电流保护测定   ···············································································   10      6.11     过电压保护测定   ···············································································   10      6.12     温度保护测定   ··················································································   11      6.13     管电流欠毫安保护装置测定   ···································································   11      6.14     连续工作稳定性能测定   ········································································   11      6.15     变频、气绝缘主回路稳压电路输出电压波动测定   ·············································   11      6.16     漏射线所致周围剂量当量率测定   ······························································   11      6.17     低压回路绝缘电阻测定   ········································································   11      6.18     接地保护装置接地电阻测定   ···································································   11      6.19     低压回路绝缘强度测定   ········································································   11      6.20     高压回路绝缘强度测定   ········································································   12 GB/T 26838—2024     Ⅰ      6.21     高压变压器次级对地绝缘强度测定   ·····························