| This standard was formulated for the purpose of implementing Environmental Protection Law of the People's Republic of China and Air Pollution Prevention and Control Law, guaranteeing the quality of emission testing and controlling smoke emission of vehicles with compression ignition engine, improving air quality and protecting human health. The standard provides specifications, technical requirements for functions and performance and testing method of opacity smokemeters. For facilities equipped with computer control system, basic requirements are set out for the smoke test software. The standard also provides requirements for test items and methods for test stations to conduct routine check of equipment, on-site installation equipment and type approval equipment. It is the first time to issue the standard and it serves as guidance only. |
