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公开(公告)号：US10367612B2
公开(公告)日：2019-07-30
申请号：US14871850
申请日：2015-09-30
Applicant: Rosemount Inc.
Inventor： Steven John McCoy , David Richard Lauzon
Abstract: A two-wire process variable transmitter for use in an industrial process includes a process variable sensor configured to sense a process variable of a process fluid of the industrial process. Output circuitry provides an output on a two-wire process control loop which is related to the sensed process variable. Terminal voltage measurement circuitry measures a voltage at terminals of the process variable transmitter. The terminal voltage is a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. A microprocessor performs loop diagnostics on the two-wire process control loop based upon a loop current and the measured terminal voltage. The microprocessor determines coefficients of a polynomial equation which relates loop current and terminal voltage during normal operation of the two-wire process variable transmitter and performs subsequent diagnostics based upon the coefficients of the polynomial.
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公开(公告)号：US20160381822A1
公开(公告)日：2016-12-29
申请号：US14753119
申请日：2015-06-29
Applicant: Rosemount Inc.
Inventor： George C. Hausler , Steven John McCoy , Christopher Lee Eriksen , Jeffrey Alan Cota
CPC classification number: H05K5/069 , G01D11/24 , G01D21/00 , H05K5/0065 , H05K7/1428 , H05K7/1432
Abstract: A process variable transmitter for use in an industrial process includes a housing having a cavity formed therein. The housing has a barrier which divides the cavity into first and second cavities. Preferably, measurement circuitry in the first cavity is configured to measure a process variable of the industrial process. A terminal block assembly is positioned in the second cavity. The terminal block assembly forms a seal with the housing thereby forming a third cavity between the barrier and a circuit board of the terminal block assembly.
Abstract translation: 用于工业过程的过程变量变送器包括其中形成有空腔的壳体。 壳体具有将空腔分成第一和第二腔的屏障。 优选地，第一腔中的测量电路被配置成测量工业过程的过程变量。 端子块组件定位在第二腔中。 端子块组件与壳体形成密封件，从而在阻挡件和端子块组件的电路板之间形成第三腔。
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Patent Agency Ranking
公开(公告)号：US20170093533A1
公开(公告)日：2017-03-30
申请号：US14871850
申请日：2015-09-30
Applicant: Rosemount Inc.
Inventor： Steven John McCoy , David Richard Lauzon
CPC classification number: H04L1/24 , G05B11/012 , G05B19/0423 , G05B2219/24069 , G08C19/02 , H04L12/40169 , H04L43/0847 , H04Q9/00
Abstract: A two-wire process variable transmitter for use in an industrial process includes a process variable sensor configured to sense a process variable of a process fluid of the industrial process. Output circuitry provides an output on a two-wire process control loop which is related to the sensed process variable. Terminal voltage measurement circuitry measures a voltage at terminals of the process variable transmitter. The terminal voltage is a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. A microprocessor performs loop diagnostics on the two-wire process control loop based upon a loop current and the measured terminal voltage. The microprocessor determines coefficients of a polynomial equation which relates loop current and terminal voltage during normal operation of the two-wire process variable transmitter and performs subsequent diagnostics based upon the coefficients of the polynomial.
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公开(公告)号：US10324055B2
公开(公告)日：2019-06-18
申请号：US14871884
申请日：2015-09-30
Applicant: Rosemount Inc.
Inventor： Steven John McCoy
Abstract: A process variable transmitter for use in an industrial process includes a housing having a cavity formed therein. The housing has a barrier which divides the cavity into first and second cavities. Measurement circuitry in the first cavity is configured to measure a process variable of the industrial process. A terminal block assembly is located in the second cavity. A moisture sensor has an electrical characteristic which changes based upon the presence of moisture in the second cavity.
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公开(公告)号：US10320535B2
公开(公告)日：2019-06-11
申请号：US14871850
申请日：2015-09-30
Applicant: Rosemount Inc.
Inventor： Steven John McCoy , David Richard Lauzon
Abstract: A two-wire process variable transmitter for use in an industrial process includes a process variable sensor configured to sense a process variable of a process fluid of the industrial process. Output circuitry provides an output on a two-wire process control loop which is related to the sensed process variable. Terminal voltage measurement circuitry measures a voltage at terminals of the process variable transmitter. The terminal voltage is a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. A microprocessor performs loop diagnostics on the two-wire process control loop based upon a loop current and the measured terminal voltage. The microprocessor determines coefficients of a polynomial equation which relates loop current and terminal voltage during normal operation of the two-wire process variable transmitter and performs subsequent diagnostics based upon the coefficients of the polynomial.
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公开(公告)号：US10015899B2
公开(公告)日：2018-07-03
申请号：US14753119
申请日：2015-06-29
Applicant: Rosemount Inc.
CPC classification number: H05K5/069 , G01D11/24 , G01D21/00 , H05K5/0065 , H05K7/1428 , H05K7/1432
Abstract: A process variable transmitter for use in an industrial process includes a housing having a cavity formed therein. The housing has a barrier which divides the cavity into first and second cavities. Preferably, measurement circuitry in the first cavity is configured to measure a process variable of the industrial process. A terminal block assembly is positioned in the second cavity. The terminal block assembly forms a seal with the housing thereby forming a third cavity between the barrier and a circuit board of the terminal block assembly.
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公开(公告)号：US20170089856A1
公开(公告)日：2017-03-30
申请号：US14871884
申请日：2015-09-30
Applicant: Rosemount Inc.
Inventor： Steven John McCoy
CPC classification number: G01N27/223 , G01D11/24 , G01D11/245 , G01D21/02
Abstract: A process variable transmitter for use in an industrial process includes a housing having a cavity formed therein. The housing has a barrier which divides the cavity into first and second cavities. Measurement circuitry in the first cavity is configured to measure a process variable of the industrial process. A terminal block assembly is located in the second circuitry. A moisture sensor has an electrical characteristic which changes based upon the presence of moisture in the second cavity.
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