IMPROVED TEMPERATURE COMPENSATION OF A MULTIVARIABLE PRESSURE TRANSMITTER

摘要

A multivariable process fluid pressure transmitter (10) includes an electronics module (18) and a sensor module (222). The sensor module (222) is coupled to the electronics module (18). A process fluid temperature sensor is coupled to the process fluid pressure transmitter. A differential pressure sensor (228) is disposed within the sensor module (22) and is operably coupled to a plurality of process fluid pressure inlets. A static pressure sensor (230) is also disposed within the sensor module (222) and is operably coupled to at least one of the process fluid pressure inlets. A first temperature sensor (232) is disposed within the sensor module (222) and is configured to provide an indication of a temperature of the differential pressure sensor (228). A second temperature sensor (234) is disposed within the sensor module (222) and is configured to provide an indication of a temperature of the static pressure sensor (230). Measurement circuitry (328) is operably coupled to the differential pressure sensor (228), the static pressure sensor (230), and the first (232) and second (234) temperature sensors. A processor (326) is coupled to the measurement circuitry (328) and is configured to provide a compensated differential pressure output based on a measurement of the differential pressure sensor (238) and the first temperature sensor (232), and to provide a compensated static pressure output based on a measurement of the static pressure sensor (230) and the second temperature sensor (234).