发明公开
EP2430407A2 SYSTEM TO DETECT POOR PROCESS GROUND CONNECTIONS WITHIN AN ELECTROMAGNETIC FLOWMETER
审中-公开
在电磁流量计中检测不良过程接地连接的系统
- 专利标题： SYSTEM TO DETECT POOR PROCESS GROUND CONNECTIONS WITHIN AN ELECTROMAGNETIC FLOWMETER
- 专利标题（中）： 在电磁流量计中检测不良过程接地连接的系统
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申请号： EP10726710.6申请日： 2010-05-10
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公开(公告)号： EP2430407A2公开(公告)日： 2012-03-21
- 发明人: FOSS, Scot, R. , TOTENHAGEN, William, G.
- 申请人： Rosemount, Inc.
- 申请人地址： 12001 Technology Drive Eden Prairie, MN 55344 US
- 专利权人： Rosemount, Inc.
- 当前专利权人： Rosemount, Inc.
- 当前专利权人地址： 12001 Technology Drive Eden Prairie, MN 55344 US
- 代理机构： Hassa, Oliver Michael
- 优先权： US464409 20090512
- 国际公布： WO2010132328 20101118
- 主分类号： G01F1/60
- IPC分类号： G01F1/60 ; G01F25/00
摘要：
A field device (100) is disclosed that includes a pair of electrodes (138,140) coupled to a process fluid (128) and a diagnostic circuit (156) coupled to the pair of electrodes (138,140) to monitor a common mode signal. The diagnostic circuit (156) is adapted to detect a poor ground connection associated with at least one electrode of the pair of electrodes (138,140) based on line noise associated with the common mode signal.
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