This Technical Report describes the different simplified short tests for the determination of the exhaust smoke emission of diesel engines of vehicles in service. Gives terms and definitions. Annex A describes the test methods. Annex B gives the working conditions of the engine during the measurement. The annexes C to K describe further details.
You easily download any file type for your gadget.ISO/TR 9310:1987, Road vehicles - Smoke measurement of compression-ignition (diesel) engines - Survey of short in-service tests | ISO TC 22/SC 5. A good, fresh read, highly recommended.