中华人民共和国国家生态环境标准HJ1237—2021机动车排放定期检验规范Specificationformotorvehiclesperiodicemissionsinspection本电子版为正式标准文本，由生态环境部环境标准研究所审校排版。2021-12-27发布2022-07-01实施生态环境部发布HJ1237—2021i目次前言.................................................................................................................................................................ii1适用范围........................................................................................................................................................12规范性引用文件.............................................................................................................................................13术语和定义....................................................................................................................................................14检验系统组成与技术要求.............................................................................................................................25日常运行和维护要求.....................................................................................................................................36标准物质........................................................................................................................................................37检验技术要求.................................................................................................................................................48数据记录及修约.............................................................................................................................................49质量保证........................................................................................................................................................4附录A（规范性附录）设备检查与校正要求...............................................................................................5附录B（规范性附录）车辆外观检验.........
