Gage pressure output from an absolute pressure measurement device
First Claim
1. A pressure measurement device, comprising:
- an inlet couplable to a pressurized process fluid;
an absolute pressure sensor coupled to the inlet and providing a process sensor output representing absolute pressure of the process fluid;
a field wiring compartment with an electrical connector couplable to a control system;
a bus coupled to the electrical connector and providing serial communication and energization to the pressure measurement device;
an atmospheric pressure sensor module connected to the bus at the electrical connector, the bus providing the energization to the atmospheric pressure sensor module and the bus receiving a serial communication signal from the atmospheric pressure sensor module, the serial communication signal including numeric data representing atmospheric pressure; and
a circuit coupled to the bus at the electrical connector and receiving the process sensor output and receiving the serial communication signal from the bus, the circuit providing a gage pressure output couplable to the control system as a calculated difference between the sensed absolute pressure and the received numeric data.
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Accused Products
Abstract
A pressure measurement device comprising an absolute pressure sensor and a bus coupling serial communication and energization to an electrical connector in a field wiring compartment. An atmospheric pressure sensor module is connected to the bus at the electrical connector. The bus provides the energization to the atmospheric pressure sensor module and the bus receives a serial communication signal from the atmospheric pressure sensor module. The serial communication signal includes numeric data representing atmospheric pressure. The pressure measurement device provides a gage pressure output as a calculated difference between the sensed absolute pressure and the received numeric data.
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Citations
20 Claims
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1. A pressure measurement device, comprising:
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an inlet couplable to a pressurized process fluid;
an absolute pressure sensor coupled to the inlet and providing a process sensor output representing absolute pressure of the process fluid;
a field wiring compartment with an electrical connector couplable to a control system;
a bus coupled to the electrical connector and providing serial communication and energization to the pressure measurement device;
an atmospheric pressure sensor module connected to the bus at the electrical connector, the bus providing the energization to the atmospheric pressure sensor module and the bus receiving a serial communication signal from the atmospheric pressure sensor module, the serial communication signal including numeric data representing atmospheric pressure; and
a circuit coupled to the bus at the electrical connector and receiving the process sensor output and receiving the serial communication signal from the bus, the circuit providing a gage pressure output couplable to the control system as a calculated difference between the sensed absolute pressure and the received numeric data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pressure measurement device, comprising:
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an inlet couplable to a pressurized process fluid;
an absolute pressure sensor coupled to the inlet and providing a process sensor output representing absolute pressure of the process fluid;
a field wiring compartment with an electrical connector couplable to a control system;
a bus providing serial communication and energization coupled to the electrical connector; and
a circuit receiving the process sensor output and coupled to the bus for receiving a serial communication signal from the bus, the serial communication signal including numeric data representing atmospheric pressure, the circuit providing a gage pressure output couplable to the control system as a calculated difference between the sensed absolute pressure and the received numeric data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification