RECOMMENDED PRACTICE IN OPERATION OF INSTRUMENTS FOR MEASUREMENT OF AUTO EXHAUST EMISSIONS BY THE CVS PROCEDURE

Reliable measurement of exhaust emissions is dependent on acquiring representative samples and on utilizing analytical techniques that yield repeatable, accurate measurements. Several different approaches to the sampling problem have been used successfully; among these, the constant volume sampling method has gained general acceptance, primarily because of three advantages over alternative methods: (1) sample integrity remains relatively unperturbed over the collection interval, (2) volumetric control and measurement is relatively less complicated than with other procedures, and (3) the method lends itself well to direct mass measurement. There is, however, a potential problem in that the concentrations of materials to be measured - relatively low in the exhaust - are further lowered by introduction of a diluent carrier, i.e., air. In order to minimize errors associated with measurements of low concentration, it is necessary to adhere to good practice in instrumental procedures. A technical committee of the Coordinating Research Council sponsored preparation of documents that describe good practices in the constant volume sampling measurement and serve as reference guides. Two documents were prepared which cover recommended practices for collection and measurement. A condensation of the document on measurement is given. (ERA citation 02:007461)

  • Corporate Authors:

    Energy Research and Development Administration

    Bartlesville Energy Research Center
    Bartlesville, OK  United States 
  • Authors:
    • HURN, R W
  • Publication Date: 1976-10

Media Info

  • Pagination: 27 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00151274
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Files: TRIS
  • Created Date: Apr 13 1977 12:00AM