This document describes the calibration and validation procedures for the VPR. Calibration of the VPR is to be performed at the point of manufacture and validation is to be performed at least at 6 month intervals for all instruments without automatic temperature sensors or at least at 12 month intervals if automatic temperature sensors are present. The calibration procedure must be repeated if the system ‘fails’ its validation procedure or the particle number measurement system is modified in any way.

Presentation on REBRAKE, the European Commission-supported project to better understand brake-wear emissions and their impact on air quality.

Discussion presentation on issues potentially impacting the measurement of PN during regeneration of gasoline particulate filters and diesel particulate filters on light-duty vehicles.

Draft copy for PMP informal group comment of the JRC Science and Policy Report.

Summary of the PN calibration project under the European Metrology Research Programme’s project on “emerging requirements for measuring pollutants from automotive exhaust emissions” (EMRP ENV-02).

Presentation on Swedish and Scandinavian research into sources and impact of non-exhaust airborne particles, including from wear on roads, tires, brakes, and similar sources.