Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1989-06-29
1990-09-18
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Diaphragm
73706, G01L 1302
Patent
active
049570013
ABSTRACT:
An apparatus for the accurate measurement of pressure changes has a reference accumulator and a differential pressure transducer. The reference accumulator stores a pressure representative of the environment being measured. The differential pressure transducer measures the difference between the reference pressure and the pressure of the environment being measured. Connected to the reference accumulator is a valve that allows the reference accumulator to be charged to a pressure representative of the environment being measured and provides protection to the differential pressure transducer from overpressuring. This valve can be controlled remotely by electrical means. With the use of an isolation means, such as an isolation bellows, the whole apparatus can be protected from the environment being measured. A data acquisition and control system connected both to the differential pressure transducer and to the valve can be used to record measurements from the differential pressure transducer and to control the valve.
REFERENCES:
patent: 3538746 (1970-11-01), Jacobs et al.
patent: 3898877 (1975-08-01), McArthur
Chevron Research Company
Keeling Edward J.
Schaal Ernest A.
Woodiel Donald O.
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