New Methods for Emission Analyzer Calibrations
Traditionally, vehicle emission testing has used non-intelligent analyzers to meet government-regulated standards. Typically, these instruments would provide a 0 to 5-volt signal to a central test cell computer which would then handle all calibrations including analyzer linearization, zero and span corrections, stability checks, time delays, and sample readings. Modern gas analyzers now contain intelligence within each individual analyzer; this has caused the calibration methods to change dramatically. New methods were developed in the bench control system to take advantage of the intelligence of the analyzers by creating a distributed control architecture. The zeroing, spanning, and linearization methods are quite different from the previous protocols. The results, however, will provide more accurate reading to be used in calculating vehicle emissions.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- Megdanoff, Christopher
- Beaudoin, Mark
- Middleton, Rick
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Conference:
- International Congress & Exposition
- Location: Detroit Michigan, United States
- Date: 1998-2-23 to 1998-2-26
- Publication Date: 1998-1-23
Language
- English
Media Info
- Media Type: Web
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Serial:
- SAE Technical Paper
- Publisher: Society of Automotive Engineers (SAE)
- ISSN: 0148-7191
- EISSN: 2688-3627
- Serial URL: http://papers.sae.org/
Subject/Index Terms
- TRT Terms: Calibration; Computer architecture; Control systems; Emissions testing; Gases; Pollutants; Test facilities
- Subject Areas: Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01794448
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 1999-01-0153
- Files: TRIS, SAE
- Created Date: Dec 9 2021 10:17AM