公开(公告)号：EP2145161A1

公开(公告)日：2010-01-20

申请号：EP08742936.1

申请日：2008-04-16

申请人： Rosemount, Inc.

发明人： SCHULZ, Robert, K. ,  FOSS, Scot, R. ,  TOTENHAGEN, William, G. ,  HUNTER, Kirk, A.

IPC分类号： G01F1/60 ,  G01F15/06 ,  G01F25/00 ,  G08C19/02

摘要： A magnetic flowmeter transmitter includes a flowtube and measurement circuitry which provides an output related to flow through the flowtube. Output circuitry, such as analog and pulse output circuitry, provides transmitter output(s) related to flow through the flowtube. Output verification circuitry of the transmitter is coupled to the output circuitry and provides verification of proper operation of the output circuitry by analyzing the output signals.

摘要翻译： 磁流量计发射器包括流量计和测量电路，其提供与通过流量管的流量相关的输出。 输出电路，例如模拟和脉冲输出电路，提供与通过流量管的流量相关的发射器输出。 发射器的输出验证电路耦合到输出电路，并通过分析输出信号来提供对输出电路的正确操作的验证。

公开(公告)号：EP2430407A2

公开(公告)日：2012-03-21

申请号：EP10726710.6

申请日：2010-05-10

申请人： Rosemount, Inc.

发明人： FOSS, Scot, R. ,  TOTENHAGEN, William, G.

IPC分类号： G01F1/60 ,  G01F25/00

CPC分类号： G01F1/60 ,  G01F25/0007

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.