Test gas generator for calibrating gas meters

Details Test gas generator for calibrating gas meters Test gas generator for calibrating gas meters

1994-11-15

1996-02-27

Williams, Hezron E.

Measuring and testing

Instrument proving or calibrating

436 9, G01N 3700, G01N 3348, B01L 500

Patent

active

054938910

ABSTRACT:
A device for generating a test gas e.g., ethanol has at least two series-connected containers, which are filled with a calibration solution. A carrier gas, which is enriched with the calibration substance present in the solution corresponding to the vapor pressure of the calibration substance at the given temperature, is passed through these calibration containers. To prevent or to reduce the depletion of the components necessary for the gaseous calibration substance in the calibration solution, a defined amount of a stock solution is fed through the calibration containers in counterflow to the direction of delivery of the carrier gas.

REFERENCES:
patent: 3614855 (1971-10-01), Van Luik, Jr.
patent: 3760773 (1973-09-01), Christensen
patent: 3885414 (1975-05-01), Reville
patent: 3890100 (1975-06-01), Busch
patent: 4003240 (1977-01-01), Durbin
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patent: 4351743 (1982-09-01), Hashimoto
patent: 4407152 (1983-10-01), Guth
patent: 4474048 (1984-10-01), Schmidt
patent: 4625543 (1986-12-01), Ertl et al.
patent: 4723436 (1988-02-01), Moreth et al.
patent: 4793173 (1988-12-01), Moreth et al.

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