GAR | PMP-30-11

Document Number PMP-30-11

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Document title	Measuring soot particles from automotive exhaust emissions
Date	3 Apr 2014			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).
Source(s)	METAS
Status
Rulemaking area(s)	PMP
Meeting(s)	PMP \| Session 30 \| 3-4 Apr 2014 Agenda item 5. EMRP-ENV-02
Related documents
Downloads:		.pptx format
Excerpts from session reports related to this document
PMP \| Session 30 \| 3-4 Apr 2014			Hans-Peter Andres (METAS) gave an overview of the EMRP-ENV-02 project and the 6 deliverables and status to date. Final workshop 13-14 May 2014. Key conclusions: Counting efficiency is material dependent (slide 14) ‘Soot likeness’ is not a good criterion as soon is intrinsically variable Primary calibration – recommends heterogenous nucleation of silver (using seed particles) as allows larger monodisperse size However, delivery to field needs a less onerous method. Uncertainty chain (traceability) from electrometer to CPC completed All 6 deliverables achieved, however, several reports still in progress. See link on Slide 26 for additional information Discussion on how to translate the above into a practical chain of work – eg primary calibration by silver particles would mean sending CPC to METAS. Secondary aerosol and transfer functions – eg could be emery oil as long as traceability through the silver particles. H-G Horn briefly outlined a procedure for traceability.