Measurement of exhaust gas opacity with free acceleration (no load from idling up to cut-off speed). The level of concentration must not exceed the following limit values of the coefficient of absorption:
- naturally aspirated diesel engines = 2,5 m-1,
- turbo-charged diesel engines = 3,0 m-1, or equivalent values where use is made of equipment of a type different from that complying with these requirements.
Online Language Learning Tool SkELL allows users to search for phrases in sentences, collocates and similar words. These examples have been automatically selected and may contain errors.
