VARIABLES AFFECTING AIR QUALITY INSTRUMENT OPERATION

When an air pollution monitoring system is put into operation, it should be analyzed to determine whether system variables will affect the output of analytical instruments within the system. An analysis of the monitoring system of a Caltrans air pollution research van is presented. This analysis investigates the effects of several system variables on instrument response, including the length of the sample intake lines, variation in instrument supply voltage, van interior temperature, soiling of intake line filters and the retention time of air samples in teflon bags. Where system variables are found to affect instrument response, regression equations were developed which correct for the effects of these variables.

• Supplemental Notes:
  • Report on Air Pollution and Roadway Location, Design and Operation. See also report dated Sep 76, PB-271 726.
• Corporate Authors:

  California Department of Transportation

  Transportation Laboratory
  5900 Folsom Boulevard
  Sacramento, CA  United States  95819

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Peter, R R
  • Pinkerman, K O
  • Shirley, E C
• Publication Date: 1977-7

Media Info

• Pagination: 82 p.

Subject/Index Terms

• TRT Terms: Air pollution; Carbon monoxide; Chemical analysis; Concentration (Chemistry); Design; Gas analysis; Gas detectors; Hydrocarbons; Instrumentation; Location; Methane; Monitoring; Nitric oxide; Nitrogen oxides; Numerical analysis; Ozone; Performance evaluations; Performance tests; Regression analysis; Sampling; Sulfur dioxide; Tables (Data); Temperature
• Uncontrolled Terms: Building sites; Design criteria
• Subject Areas: Data and Information Technology; Design; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00168918
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FHWA-RD-77- 77 Intrm Rpt., CAL-TL-7080-77-15, FCP 33F3-032
• Contract Numbers: DOT-FH-11-7730
• Files: NTIS, TRIS, USDOT, STATEDOT
• Created Date: Jan 13 1978 12:00AM