Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1989-11-29
1992-02-18
Noland, Tom
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73 2321, G01D 1800
Patent
active
050883135
ABSTRACT:
Apparatus for monitoring and correcting gas analyzers having a measuring chamber with an inlet and an outlet, and a pump for supplying a pressurized measuring gas, further includes a flow throttle for providing flow resistance and being connected to the outlet of the analyzer to obtain a gas pressure in the chamber above a level downstream from the throttle; a pressure transducer is connected to measuring gas pressure of the measuring gas upstream from the throttle but downstream from the pump, preferably also upstream from the analyzer; an output signal from the transducer is used for correcting errors of the measuring signal of the gas analyzer caused by variations of gas pressure in the measuring chamber on account of variations in the gas pressure, for using the same output signal to extract a rate of flow indication as to the measuring gas and for ascertaining that the flow remains within specified limits.
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General Handbook of Online Analyzers; Chapter 8, pp. 106-108; D. J. Haskins; Published, Chichester 1981.
Fabinski Walter
Franck Gerhard
Nevole Josef
Taubitz Georg
Hartmann & Braun
Noland Tom
Siegemund R. H.
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