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Residual gas analyzer calibrationA technique which employs known gas mixtures to calibrate the residual gas analyzer (RGA) is described. The mass spectra from the RGA are recorded for each gas mixture. This mass spectra data and the mixture composition data each form a matrix. From the two matrices the calibration matrix may be computed. The matrix mathematics requires the number of calibration gas mixtures be equal to or greater than the number of gases included in the calibration. This technique was evaluated using a mathematical model of an RGA to generate the mass spectra. This model included shot noise errors in the mass spectra. Errors in the gas concentrations were also included in the valuation. The effects of these errors was studied by varying their magnitudes and comparing the resulting calibrations. Several methods of evaluating an actual calibration are presented. The effects of the number of gases in then, the composition of the calibration mixture, and the number of mixtures used are discussed.
Document ID
19720014649
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lilienkamp, R. H.
(McDonnell Aircraft Co. Saint Louis, MO, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA. Goddard Space Flight Center Space Simulation
Subject Category
Instrumentation And Photography
Report/Patent Number
PAPER-71
Accession Number
72N22299
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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