THREE COMMON FAULTS IN CURRENT PRACTICE THAT INFLUENCE THE VALIDITY OF DATA OBTAINED FROM ELECTRONIC AIR POLLUTION INSTRUMENTATION

This paper reports on three faults associated with instrument operating practice that produce enormous and unnecessary output errors. The first fault examined is injection calibration: a practice whereby the peak height of a recorder output is related to the concentration of some sample injected into the input air stream. The second fault examined is the practice of developing signals too low to measure by ineffective loading of the sensing element. The third fault examined is associated with attenuation and signal sampling times. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00489697
• Corporate Authors:

  Elsevier

  Radarweg 29
  Amsterdam,   Netherlands  1043 NX
• Authors:
  • Dowd, G
  • Thomas, R S
  • Mankman, J L
• Publication Date: 1975

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 225-234
• Serial:
  • Science of the Total Environment
  • Issue Number: 3
  • Publisher: Elsevier
  • ISSN: 0048-9697
  • Serial URL: http://www.sciencedirect.com/science/journal/00489697

Subject/Index Terms

• TRT Terms: Air pollution; Calibration; Chemical concentration; Defects; Electronic equipment; Electronics; Errors; Faults; Measuring instruments; Output; Sensors; Signals
• Uncontrolled Terms: Attenuation; Input
• Old TRIS Terms: Electronic devices
• ITRD Terms: 6155: Apparatus (measuring); 6171: Calibration; 1394: Catalytic converter; 7132: Concentration (chem); 5238: Defect (tech); 6965: Electronics; 6440: Error; 6120: Sensor; 6967: Signal
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00127761
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 14 1976 12:00AM