Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1990-10-18
1993-04-27
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2502521, 250345, G01N 2161
Patent
active
052065111
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.
REFERENCES:
patent: 3728540 (1973-04-01), Todd et al.
patent: 4678914 (1987-07-01), Melrose et al.
patent: 4914720 (1990-04-01), Knodle et al.
patent: 5013920 (1991-05-01), Asano et al.
Apperson Jerry R.
Cooke Walter A.
Graham Paul K.
Labuda Lawrence L.
Mace Leslie E.
Cascadia Technology Corporation
Dunn Drew A.
Fields Carolyn E.
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