| 摘要 |
A process pressure measuring system (80) includes a transmitter (92) having a first sealed system (100) in which a first outlet (110) couples to a pressure sensor (440), a first isolator diaphragm assembly (112), a first capillary passage (114), and a first isolation fluid. The first isolation fluid couples a first pressure from the first isolator diaphragm assembly (112) to the first outlet (110) and the pressure sensor (440). A second sealed system (200) includes a second pressure outlet (220) that is coupled to the first isolator diaphragm assembly (112), a second isolator diaphragm assembly (212), a second capillary passage (214) and a second isolation fluid. The second isolation fluid is adapted for use in a first temperature range and couples a pressure from the second isolator diaphragm assembly (212) to the second pressure outlet (210). A third sealed system (300) includes a third pressure outlet (310) that is coupled to the second isolator diaphragm assembly (212), a third isolator diaphragm assembly (312), a third capillary passage (314) and a third isolation fluid. The third isolator fluid is adapted for use in a second temperature range and couples a process pressure to the third pressure outlet (310). |
