sensor failure and differential pressure flow meter and has a redundant pressure sensor capable of and deterioration detection

摘要

system for measuring the flow rate of the process fluid flowing through the process pipe (102) (100), The resulting restriction element a pressure difference between the downstream side of the upstream and the restriction element (108) of (108), and a fluid restriction element (108) provided in the process pipe. This pressure difference is related to the flow rate of the process fluid. The first and second upstream pressure transmitter (104C, 104D) is coupled process pipe (102) upstream of the fluid restriction element (108), respectively, measuring the first and second upstream pressure to. The first and second downstream pressure transmitters (104A, 104B) is coupled process pipe (102) downstream of the fluid restriction element (108), respectively, measuring the first and second downstream pressure to. The flow rate of the process fluid is calculated based on at least one of the upstream pressure and a downstream pressure.