OIML Recommendation R 99-1-2:2008

Instruments for measuring vehicle exhaust emissions

Scope: This International Recommendation specifies the metrological and technical requirements and tests for digital measuring instruments (hereafter termed "instrument(s)") that serve to determine the volume fractions of certain components of the exhaust gases emanating from motor vehicles. The conditions with which such instruments shall comply in order to meet any OIML performance requirements are also established.