Measuring and testing – Instrument proving or calibrating – Gas or liquid analyzer
Patent
1995-10-20
1997-06-03
Noland, Thomas P.
Measuring and testing
Instrument proving or calibrating
Gas or liquid analyzer
73 106, G01N 3300
Patent
active
056356200
ABSTRACT:
A device for supplying gas to an analyzer for measuring traces of impurities in the gas comprising: (i) a source of pure gas; (ii) a set of at least first and second bypass gas lines, arranged in parallel and fed by the source of pure gas, the first and second bypass gas lines having a common gas entry and a common gas exit, the common gas exit being in communication with a feed line of the analyzer through a common gas exit line; (iii) a device for charging a gas in the first bypass gas line with a predetermined quantity of at least one impurity for forming a standardizing gas; (iv) a restriction disposed in each of the first and second bypass gas lines, each restriction being calibrated to divide the flow of pure gas feeding the set between the first and second bypass lines in a predetermined ratio; and (v) a flow regulator for regulating the flow of pure gas feeding the set of bypass gas lines, disposed between the source of pure gas and the common gas entry of the first and second bypass gas lines, wherein the first and second bypass gas lines, between the common gas entry and the calibrated restriction are devoid of any pressure-measuring member.
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Patent Abstracts of Japan, vol. 5, No. 188, Abstract Published Nov. 27, 1981 (56-111033), "Gas Mixer".
Mail Alain
Marot Yves
Ronge Catherine
L'Air Liquide Societe Anonyme pour l'Etude et, l'Exploitation de
Noland Thomas P.
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