Calibration system for gas analyzers

Details Calibration system for gas analyzers Calibration system for gas analyzers

1983-07-18

1985-07-30

Levy, Stewart J.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01D 1800, G01M 1900

Patent

active

045313989

ABSTRACT:
A calibration system is provided for gas analyzers, and particularly for apparatus for measuring atmospheric pollution and for detecting gaseous pollutants. The device comprises a tight permeation chamber connected to a source of a gaseous pollutant or a plurality of chemically compatible gaseous pollutants, e.g., SO.sub.2, NO or CH.sub.4. A tube formed from a material which is permeable to the gaseous pollutant(s) extends across the chamber, one end of the tube being connected to a source of pressurized pure vector gas and the other end of the tube communicating with a mixer which is itself connected to a source of dilution zero air. Apparatus is also provided for regulating temperature to maintain a predetermined constant temperature within the permeation chamber.

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"Advances in Instrumentation", vol. 31, No. 3 (1976), Design Criteria for a Portable Gas Phase Titration Calibration System, p. 710, lines 1-6 and FIGS. 3 and 4, Jerry Clemons et al., (6 sheets).
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"Generator for Producing Trace Vapor Concentrations of 2,4,6-Trinitrotoluene, 2,4-Dinitrotoluene, and Ethylene Glycol Dinitrate for Calibrating Explosives Vapor Detectors"; Analytical Chemistry, vol. 48, No. 11, Sep. 1976, pp. 1632-1637, Peter A. Pella.

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