Calibration method for NDIR equipment and calibration apparatus
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United States of America Patent
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Dec 15, 1998
Grant Date -
N/A
app pub date -
Mar 22, 1996
filing date -
Mar 22, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for calibrating an NDIR gas analyzer is provided. According to the method, the apparatus under calibration is calibrated with the help of a reference apparatus under controlled conditions. The reference apparatus is a laboratory-calibrated NDIR measurement apparatus in an arrangement based on circulating ambient air via both a measurement chamber of the measurement apparatus under calibration and measurement chamber of the laboratory-calibrated measurement apparatus. Adjusting the reading of a display, or alternatively, an output signal of the measurement apparatus under calibration to be equal to the reading of the display, or the output signal, respectively, of the reference apparatus is performed by a control device of the measurement apparatus.
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