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New Methods for Emission Analyzer Calibrations
Technical Paper
1999-01-0153
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
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.
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Citation
Megdanoff, C., Beaudoin, M., and Middleton, R., "New Methods for Emission Analyzer Calibrations," SAE Technical Paper 1999-01-0153, 1999, https://doi.org/10.4271/1999-01-0153.Also In
References
- SCPI proposal #AI003h.app 11 23 98
- SCPI proposal #AI006j.app