IMPROVED TEMPERATURE COMPENSATION OF A MULTIVARIABLE PRESSURE TRANSMITTER

摘要

A multivariable process fluid pressure transmitter includes an electronics module and a sensor module. The sensor module is coupled to the electronics module. A process fluid temperature sensor is coupled to the process fluid pressure transmitter. A differential pressure sensor is disposed within the sensor module and is operably coupled to a plurality of process fluid pressure inlets. A static pressure sensor is also disposed within the sensor module and is operably coupled to at least one of the process fluid pressure inlets. A first temperature sensor is disposed within the sensor module and is configured to provide an indication of a temperature of the differential pressure sensor. A second temperature sensor is disposed within the sensor module and is configured to provide an indication of a temperature of the static pressure sensor. Measurement circuitry is operably coupled to the differential pressure sensor, the static pressure sensor, and the first and second temperature sensors. A processor is coupled to the measurement circuitry and is configured to provide a compensated differential pressure output based on a measurement of the differential pressure sensor and the first temperature sensor, and to provide a compensated static pressure output based on a measurement of the static pressure sensor and the second temperature sensor.