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Gas Turbine Emission Measurement Instrument Calibration Pages: 24 Published: Jan 1976
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View License Agreement Fundamental to valid emission measurements is the proper calibration of the measurement instrumentation. This paper addresses the problems associated with instrument calibration and assesses the role of instrument uncertainty in the complete analysis of error. A review of the need for instrument calibration is included, as is a discussion of the basic methodology required, from securing the necessary calibration data to its evaluation in a statistical framework. Topics necessary for proper instrument calibration and uncertainty assessment included are: proper choice of units, definition of terms, calibration to calibration precision and its variability, calibration curve fitting, calibration curve shifts and their evaluation, errors common to instruments in systems, comparisons to other identical instruments, and evaluation of manufacturers' statements. In addition, a comparison of typical instrument performance with that required by the Environmental Protection Agency (EPA) is made. Finally, the need for real-time assessment of instrument precision is discussed, and an example of how it has been achieved at Pratt and Whitney Aircraft is presented. | ||
