Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1991-12-13
1994-02-15
Noland, Tom
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
738656, G01D 1800
Patent
active
052856720
ABSTRACT:
A stainless steel exposure chamber utilizes either a gas cylinder standard or a permeation tube standard to generate the required test atmosphere. The concentrations of the contaminants in the chamber can be varied from lower parts per billion (ppb) to high parts per million (ppm) levels. The system is capable of testing several types of industrial hygiene samplers at the same time, under the same chamber conditions and at different orientations of the samplers. The chamber is also useful for the development and verification of industrial hygiene air-monitoring methods.
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Dixon, S. W.; Vasta, J. F.; Freeland, L. T.; Calvo, D. J.; and Hemingway, R. E.; "A Multiconcentration Controlled Test Atmosphere System for Calibration Studies" (Am. Ind. Hyg. J. 45(2), 99-104, Feb. 1984).
Irikura, A. K., "The Dynamic Generation and Collection of Test Atmospheres" (Technical Progress Report WRC 218-82, Shell Development Company, Houston, Tex.) Apr. 1, 1983 pp. 1-23.
Joki, H. M. "Passive Dosimeters. I. An Evaluation of the 3M Brand Organic Vapor Monitor for Benzene Exposures" (Technical Process Report WRC 113-80, Shell Development Company, Houston, Tex.) pp. 1-11 & 33-43 Aug. 1980.
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Noland Tom
Shell Oil Company
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