公开(公告)号：EP1611536A4

公开(公告)日：2006-06-07

申请号：EP03787301

申请日：2003-12-15

Applicant: ROSEMOUNT INC

Inventor： WANG RONGTAI ,  SCHULTE JOHN P

IPC: G05B23/02 ,  G01D3/08 ,  G01D21/00 ,  G01R31/28 ,  G06F11/00 ,  G06F11/30 ,  G06F15/00 ,  G06F19/00 ,  H04L20060101

CPC classification number: G01D3/08 ,  G01D21/00 ,  G05B23/0221

Abstract: A field transmitter (10) for transmitting signals representative of process variables has both a normal operating mode and a diagnostic self-test mode. The field transmitter (10) has a physical sensor (12,14) for sensing a process variable and generating a physical sensor signal which is representative of the process variable. A signal processing circuit (22,24) converts the sensor signal to a measurement which is transmitted to a control room. The field transmitter (10) also has a surrogate sensor (16,18) for producing a surrogate sensor signal which is independent of the process variable. During the diagnostic self-test mode, the surrogate sensor is connected to the signal processing circuit (22,24) in place of the physical sensor (12,14). If the output of the signal processing circuit (22,24) does not correspond to an expected value, a diagnostic code is produced.

Abstract translation: 用于传输表示过程变量的信号的现场变送器（10）具有正常操作模式和诊断自测试模式。 现场变送器（10）具有物理传感器（12,14），用于感测过程变量并产生表示过程变量的物理传感器信号。 信号处理电路（22,24）将传感器信号转换成传送给控制室的测量值。 场发射器（10）还具有用于产生独立于过程变量的替代传感器信号的替代传感器（16,18）。 在诊断自检模式期间，替代传感器连接到信号处理电路（22,24）以代替物理传感器（12,14）。 如果信号处理电路（22,24）的输出不符合期望值，则产生诊断代码。

公开(公告)号：EP2130001A4

公开(公告)日：2014-08-27

申请号：EP07862345

申请日：2007-11-29

Applicant: ROSEMOUNT INC

Inventor： KROUTH TERRANCE F ,  WANG RONGTAI ,  WENDORF KRIS ALLEN

IPC: G01F1/56 ,  G01L1/22 ,  G01L19/08 ,  G01L27/00 ,  G05F1/569

CPC classification number: G05F1/569 ,  G01L1/2268 ,  G01L19/086 ,  G01L27/007