Pressure transducer arrangement
First Claim
Patent Images
1. A pressure transducer arrangement comprising:
- a body having a first chamber in fluid communication with a first inlet, a second chamber in fluid communication with a second inlet, and a bypass channel fluidly coupling the first chamber with the second chamber;
a bypass valve having an open state allowing fluid communication between the first and second chambers through the bypass channel and a closed state preventing fluid communication between the first and second chambers through the bypass channel;
a pressure sensor interposed between the first and second chambers arranged to sense the pressure differential between the first and second chambers; and
a lock out valve interposed between the first inlet and the first chamber, the lockout valve having an open state allowing fluid communication between the first inlet and the first chamber and a closed state preventing fluid communication between the first inlet and the first chamber.
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Abstract
A pressure transducer arrangement and method of operation is provided. The pressure transducer and methods of operation reduce error in determining an offset value by eliminating error relating to fluid flow through the transducer arrangement when the offset value is determined. In a particular embodiment, the apparatus and method includes a lockout valve that prevents fluid flow between first and second fluid pressure sources when the offset value is determined.
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Citations
21 Claims
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1. A pressure transducer arrangement comprising:
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a body having a first chamber in fluid communication with a first inlet, a second chamber in fluid communication with a second inlet, and a bypass channel fluidly coupling the first chamber with the second chamber; a bypass valve having an open state allowing fluid communication between the first and second chambers through the bypass channel and a closed state preventing fluid communication between the first and second chambers through the bypass channel; a pressure sensor interposed between the first and second chambers arranged to sense the pressure differential between the first and second chambers; and a lock out valve interposed between the first inlet and the first chamber, the lockout valve having an open state allowing fluid communication between the first inlet and the first chamber and a closed state preventing fluid communication between the first inlet and the first chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a pressure transducer arrangement including a pressure sensor exposed to a first and second fluid pressure source comprising:
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exposing a first side of the pressure sensor to the second fluid pressure source; exposing a second side of the pressure sensor to the second fluid pressure source; preventing fluid flow between the first and second fluid pressure sources through the pressure transducer arrangement; and taking a zero pressure reading while both the first and second sides of the pressure sensor are exposed to the second fluid pressure source and fluid is prevented from flowing between the first and second fluid pressure source through the pressure transducer arrangement. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of operating a pressure transducer arrangement, wherein the pressure transducer arrangement includes:
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a first chamber in fluid communication with a first pressure source, a second chamber in fluid communication with a second fluid pressure source, and a bypass channel fluidly coupling the first chamber with the second chamber; a bypass valve having an open state allowing fluid communication between the first and second chambers through the bypass channel and a closed state preventing fluid communication between the first and second chambers through the bypass channel; a lock out valve interposed between the first inlet and the first chamber, the lockout valve having an open state allowing fluid communication between the pressure source and the first chamber and a closed state preventing fluid communication between the first pressure source and the first chamber; and a pressure sensor is interposed between the first and second chambers with a first side exposed to the first chamber and the second side exposed to the second chamber, the pressure sensor arranged to sense the pressure differential between the first and second chambers, the method comprising; communicating, fluidly, the first and second chambers to fluidly expose the first and second sides of the pressure sensor to the second fluid pressure source by opening the bypass valve; preventing fluid flow between the first and second fluid pressure sources through the pressure transducer arrangement by closing the lockout valve; taking a zero pressure reading. - View Dependent Claims (19, 20, 21)
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Specification