Technical Paper
Exhaust Flow Meter Calibration
2004-03-08
2004-01-1442
Exhaust flow measurements are becoming increasingly important to ensure accurate emissions measurement on both a continuous and averaged (i.e. bag) basis. When performing continuous mass measurements of hydrocarbons, nitrous oxide, carbon monoxide, carbon dioxide and other pollutant/greenhouse gases, the exhaust flow measurement is critical to the task of providing an accurate result. In addition, the acceptance of the Bag Mini-Diluter (BMD) for low-level emissions measurements has amplified the need for an accurate exhaust flow measurement. With the BMD, there is a direct correlation between fuel economy/emissions accuracy and exhaust flow measurement accuracy. To meet these demands, several new exhaust meters have emerged in the last few years that encompass promising technology and unique solutions to the traditional problems that tend to complicate exhaust flow measurements.