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公开(公告)号：EP2603778A1
公开(公告)日：2013-06-19
申请号：EP11758589.3
申请日：2011-08-09
申请人： Rosemount, Inc.
发明人： ROVNER, Bruce, D. , FOSS, Scot, R.
IPC分类号： G01F1/60
摘要： A process variable transmitter includes a sensor drive controller that outputs a sensor drive signal that is used to drive a sensor that senses a process variable. The sensor drive controller changes the frequency of the sensor drive signal to avoid frequencies and associated harmonics at which noise occurs and which could interfere with the sensor signal.
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2.发明公开
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.
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。
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公开(公告)号：EP2427737A1
公开(公告)日：2012-03-14
申请号：EP10715475.9
申请日：2010-04-27
申请人： Rosemount, Inc.
发明人： FOSS, Scot, R. , SCHULZ, Robert, K.
IPC分类号： G01F1/58
摘要： A magnetic flowmeter for measuring flow of a flow of process fluid, includes a flow tube arranged to receive the flow of process fluid therethrough. A magnetic drive coil proximate the flow tube is arranged to apply a magnetic field to the flow in response to a drive signal. At least one electrode is arranged to sense an electrical potential of the process fluid which related to the applied magnetic field and flow rate of the process fluid. Temperature measurement circuitry is coupled to the magnetic drive coil and is configured to provide a temperature output indicative of temperature of the drive coil based upon an electrical parameter of the drive coil. Flow measurement circuitry coupled to the at least one electrode is configured to provide a flow output based upon sensed electrical potential.
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4.发明公开
公开(公告)号：EP2167922A1
公开(公告)日：2010-03-31
申请号：EP08768850.3
申请日：2008-07-01
申请人： Rosemount, Inc.
发明人： FOSS, Scot, R. , SCHULZ, Robert, K.
CPC分类号： G01F1/60 , G01F25/0007
摘要： An analysis circuit in an electromagnetic flowmeter provides diagnostic operating conditions and identifies one or more of the diagnostic operating conditions for which the coil current is stable during a sample interval. A diagnostic operating condition is selected as a measurement operating condition as a function of a noise floor measurements of the electrode voltage.
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公开(公告)号：EP2404146A1
公开(公告)日：2012-01-11
申请号：EP10705773.9
申请日：2010-03-01
申请人： Rosemount, Inc.
发明人： FOSS, Scot, R. , SCHULZ, Robert, K.
CPC分类号： G01F1/586 , G01F25/0007
摘要： A magnetic flow meter includes a flowtube arranged to receive a flow of process fluid and a coil proximate the flowtube arranged to apply a magnetic field to the process fluid. A sense electrode is arranged to sense a voltage potential in the flowtube in response to the applied magnetic field. The sensed voltage is indicative of flow rate of process fluid through the flowtube. Diagnostic circuitry provides an output related to an electrical path between the coil and electrical ground.
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公开(公告)号：EP2027513B1
公开(公告)日：2011-05-04
申请号：EP07794575.6
申请日：2007-05-04
申请人： Rosemount, Inc.
发明人： FOSS, Scot, R. , CURETON, Terry, A.
IPC分类号： G05B19/042 , G05B23/02
CPC分类号： G05B23/0232 , G05B2219/32226 , G05B2219/32234 , Y02P90/14 , Y02P90/86
摘要： A condition of an industrial process is diagnosed based upon process variable information related to a value of a measured process variable. Histogram information is calculated based upon the determined process variable information and time information related to a duration of time the measured process variable has the value. Condition of the industrial process is diagnosed based upon the calculated histogram information.
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公开(公告)号：EP2027513A2
公开(公告)日：2009-02-25
申请号：EP07794575.6
申请日：2007-05-04
申请人： Rosemount, Inc.
发明人： FOSS, Scot, R. , CURETON, Terry, A.
IPC分类号： G05B19/042 , G05B23/02
CPC分类号： G05B23/0232 , G05B2219/32226 , G05B2219/32234 , Y02P90/14 , Y02P90/86
摘要： A condition of an industrial process is diagnosed based upon process variable information related to a value of a measured process variable. Histogram information is calculated based upon the determined process variable information and time information related to a duration of time the measured process variable has the value. Condition of the industrial process is diagnosed based upon the calculated histogram information.
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8.发明公开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
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.
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.
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公开(公告)号：EP2074385B1
公开(公告)日：2011-07-13
申请号：EP07839039.0
申请日：2007-09-28
申请人： Rosemount, Inc.
CPC分类号： G01F1/60 , G01F25/0007
摘要： A magnetic flowmeter (20) is provided including a magnetic flowtube (22) arranged to receive a flow of process fluid. The magnetic flowtube (22) includes a drive coil (26) and at least one sense electrode (30, 32). Measurement circuitry (154) is coupled to the flowtube (22) and is configured to provide a drive signal to the drive coil (26) and measure flow of process fluid (21) through the flow tube (22) based upon an output from the sense electrode (30, 32). A memory (204) contains a stored value (222) related to a nominal parameter of the flowtube. Verification circuitry (200) is arranged to measure a parameter of the magnetic flowtube (22) and responsively provide a verification output (210) related to operation of the magnetic flowmeter (22) based upon a comparison of the measured parameter and the stored value.
摘要翻译： 提供了一种磁流量计，其包括布置成接收工艺流体流的磁流量管。 磁流量管包括驱动线圈和至少一个感测电极。 测量电路耦合到流量计，并且被配置为基于来自感测电极的输出，向驱动线圈提供驱动信号并测量通过流管的工艺流体的流动。 存储器包含与流量计的标称参数相关的存储值。 验证电路被设置为测量磁流量计的参数，并且基于测量参数与存储值的比较来响应地提供与磁流量计的操作相关的验证输出。
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公开(公告)号：EP2074385A2
公开(公告)日：2009-07-01
申请号：EP07839039.0
申请日：2007-09-28
申请人： Rosemount, Inc.
CPC分类号： G01F1/60 , G01F25/0007
摘要： A magnetic flowmeter (20) is provided including a magnetic flowtube (22) arranged to receive a flow of process fluid. The magnetic flowtube (22) includes a drive coil (26) and at least one sense electrode (30, 32). Measurement circuitry (154) is coupled to the flowtube (22) and is configured to provide a drive signal to the drive coil (26) and measure flow of process fluid (21) through the flow tube (22) based upon an output from the sense electrode (30, 32). A memory (204) contains a stored value (222) related to a nominal parameter of the flowtube. Verification circuitry (200) is arranged to measure a parameter of the magnetic flowtube (22) and responsively provide a verification output (210) related to operation of the magnetic flowmeter (22) based upon a comparison of the measured parameter and the stored value.
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