Pressure measuring device with an absolute and atmospheric pressure sensor, which are connected via a bus with a circuit for calculating an overpressure

摘要

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.