The Non-Road Mobile Machinery (Emission of Gaseous and Particulate Pollutants) Regulations 1999

Specifications concerning the emissions of pollutants

4.2.  The gaseous and particulate components emitted by the engine submitted for testing shall be measured by the methods described in Annex V.

• Other systems or analysers may be accepted if they yield equivalent results to the following reference systems:

  • for gaseous emissions measured in the raw exhaust, the system shown in Figure 2 of Annex V,

  • for gaseous emissions measured in the dilute exhaust of a full flow dilution system, the system shown in Figure 3 of Annex V,

  • for particulate emissions, the full flow dilution system, operating with a separate filter for each mode or with the single filter method, shown in Figure 13 of Annex V.

• The determination of system equivalency shall be based upon a seven test cycle (or larger) correlation study between the system under consideration and one or more of the above reference systems.

• The equivalency criterion is defined as a ±5% agreement of the averages of the weighted cycle emissions values. The cycle to be used shall be that given in Annex III, section 3.6.1.

• For introduction of a new system into the Directive the determination of equivalency shall be based upon the calculation of repeatability and reproducibility, as described in ISO 5725.