Calibrators for infrared-type gas analyzers
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United States of America Patent
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Apr 27, 1993
Grant Date -
N/A
app pub date -
Oct 18, 1990
filing date -
Oct 18, 1990
priority date (Note) -
Expired
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Abstract
A method of and device for calibrating infrared radiation transducers. A concentration factor representing the ratio of a data signal to a reference signal for a known concentration of a designated gas in a sample containing that gas is generated. The concentration factor is stored and used during subsequent calibration procedures. The calibration device has a zero cell and a span cell with windows for transmitting infrared radiation and radiation reflecting or absorbing material in the span cell. The span cell therefore provides a known and consistent level of radiation absorption.
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