Measuring and testing – Instrument proving or calibrating – Gas or liquid analyzer
Patent
1997-02-06
1999-02-02
Noland, Thomas P.
Measuring and testing
Instrument proving or calibrating
Gas or liquid analyzer
2502521, 204401, G01N 2161, G01N 2727
Patent
active
058667946
ABSTRACT:
A device for calibrating a gas meter, in which gas to be analyzed is introduced into a measuring chamber by a delivery device via a delivery line. A storage tank is provided containing a calibrating substance, which tank is connected to the measuring chamber via a feed line. The storage tank is designed as a tank through which the gas to be analyzed can flow and has a gas inlet. A flow divider is provided in the course of the delivery line. A partial flow of the gas to be analyzed is sent by the flow divider to the gas inlet via a section of the feed line. The gas meter is an electrochemical measuring cell determining a measured concentration value of the calibrating substance in the gas to be analyzed in the measuring chamber. An infrared meter is provided, which evaluates the gas to be analyzed in the measuring chamber and generates a reference measured concentration value for the measured concentration value determined with the electrochemical measuring cell.
REFERENCES:
patent: 4793173 (1988-12-01), Moreth et al.
patent: 5394730 (1995-03-01), Crozier
patent: 5493891 (1996-02-01), Slemeyer
patent: 5612896 (1997-03-01), Stock
patent: 5720906 (1998-03-01), Matthiessen et al.
Dragerwerk Aktiengesellschaft
Noland Thomas P.
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