Title: Particle Measurement Programme (PMP) Light-Duty Inter-Laboratory Exercise: Comparison of Different Particle Number Measurement Systems
Citation: MEASUREMENT SCIENCE & TECHNOLOGY vol. 19 no. 9 p. 095401
Publication Year: 2008
JRC N°: JRC41917
ISSN: 0957-0233
URI: https://iopscience.iop.org/article/10.1088/0957-0233/19/9/095401/meta
DOI: 10.1088/0957-0233/19/9/095401
Type: Articles in periodicals and books
Abstract: The Particle Measurement Programme (PMP) measured the particle number emissions of many vehicles using a particle measurement system (RS) which was circulated around several laboratories to represent the reference point. During the exercise dilution factors, losses and volatile removal efficiency of the RS were regularly checked. In parallel with the RS some labs used their own particle measurement systems (LSs) to measure the emissions of the same test vehicles. Comparisons between results from the RS and the LSs showed that several different instruments were capable of measuring particle number emissions to within ±15% for an emissions range of 4 orders of magnitude. Real time emission patterns were correlated well for most cases. However, when dilution factor and losses were not well defined, larger differences were observed, indicating that to ensure similarity, calibration and validation procedures should be standardized for both manufacturers and labs.
JRC Directorate:Sustainable Resources

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