PRESSURE MEASUREMENT DEVICE INCLUDING AN ABSOLUTE AND AN ATMOSPHERIC PRESSURE SENSOR CONNECTED BY A BUS TO A CIRCUIT FOR CALCULATING GAGE PRESSURE

摘要

A pressure measurement device (100) comprising an absolute pressure sensor (104) and a bus (114) coupling serial communication and energization to an electrical connector (110) in a field wiring compartment (108). An atmospheric pressure sensor module (116) 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 (120) representing atmospheric pressure. The pressure measurement device provides a gage pressure output (124) as a calculated difference between the sensed absolute pressure and the received numeric data.