Data processing: measuring – calibrating – or testing – Calibration or correction system – Pressure
Reexamination Certificate
2005-05-17
2005-05-17
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Pressure
C702S045000, C702S047000, C137S487500
Reexamination Certificate
active
06895351
ABSTRACT:
A method and an apparatus for determining fluid flow through a pressure regulator is disclosed. The pressure regulator is disposed in a fluid flow passage and has a throttling element moveable in the flow passage. A stem is attached to the throttling element. The apparatus includes a first pressure sensor for measuring pressure upstream of the throttling element, a second pressure sensor for measuring pressure downstream of the throttling element, and a travel sensor for detecting the position of the throttling element. A processor is provided which includes a stored algorithm for determining flow rate based on the measured pressure and travel values and for calibrating the pressure regulator using a temporary flow meter disposed downstream of the throttling element. A system and method is also provided for calibrating a temperature transmitter associated with the pressure regulator.
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Adams Paul R.
Grumstrup Bruce F.
Fisher Controls International LLC
Walling Meagan S
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