Standard No.:	JJG 688-2025/XG1-2025
English Name:	Verification Regulation of Vehicle Exhaust Emissions Measuring Instruments
Chinese Name:	《汽车排放气体测试仪检定规程》行业标准第1号修改单
Professional Classification:	JJ    Metering
Source Content Issued by:	SAMR
Issued on:	2025-12-11
Implemented on:	2025-12-11
Status:	valid
Superseding:	JJG 688-2025 Verification Regulation of Vehicle Exhaust Emissions Measuring Instruments
Target Language:	English
File Format:	PDF

本规程适用于汽车排放气体测试仪(以下简称测试仪)的首次检定、后续检定和使用中检查。测试仪用于测定下列一种或多种组分的体积分数，测试仪对不同组分体积分数的最小测量范围应满足HC：(0～2 000)×10-6 、CO：(000～500)×10-2 、CO2：(0 0～16 0)×10-2 、NO：(0～4 000)×10-6 、O2：(0 0～21 0)×10-2 、NO2：(0～400)×10-6。