Boots – shoes – and leggings
Patent
1996-03-22
1998-12-15
Kemper, Melanie
Boots, shoes, and leggings
36457105, 2502521, 73 103, 73 106, G01N 2161
Patent
active
058503544
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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Bramley Paul
Dennis Richard
Helenelund Christer
Kemper Melanie
Vaisala Oy
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