公开(公告)号：DE602004029468D1

公开(公告)日：2010-11-18

申请号：DE602004029468

申请日：2004-08-05

Applicant: ROSEMOUNT INC

Inventor： HUISENGA GARRIE D ,  LONGSDORF RANDY J

IPC: G08C19/02 ,  H01T13/60 ,  G01R19/25 ,  G01R31/28

公开(公告)号：CA2599369A1

公开(公告)日：2006-10-05

申请号：CA2599369

申请日：2006-03-16

Applicant: ROSEMOUNT INC

Inventor： HUISENGA GARRIE D ,  LONGSDORF RANDY J ,  JOHNSON JAMES A

IPC: G08C19/02 ,  G01R19/25

Abstract: A process device is configured for coupling to a two wire process control loop. Loop current output circuitry is configured to apply an output current to the two wire process control loop. Loop current verification circuitry is coupled to the two wire process control loop and configured to detect errors in the applied output current. At least a portion of the loop current verification circuitry is independent from the loop current output circuitry.

公开(公告)号：BR9405768A

公开(公告)日：1995-12-19

申请号：BR9405768

申请日：1994-01-12

Applicant: ROSEMOUNT INC

Inventor： BODIN JOEL J ,  HUISENGA GARRIE D ,  JOHNSON THEODORE L ,  RAUTH WILLIAM C

IPC: G01L9/00 ,  G01L19/02 ,  H04B1/04 ,  H04B15/02

Abstract: A transmitter comprises a housing, an electronics assembly, an inner cover, and an outer cover. The electronics assembly includes an actuatable switch and fits within an open-ended cavity in the housing. The inner cover is positionable over the open end to cover the electronics assembly and has a deflectable button portion which is alignable with the actuatable switch and accessable from the open end while the electronics assembly is energized. The inner cover is electrically conductive and has a sleeve which frictionally mates with electrically conductive walls of the housing to shield the electronics assembly from electromagnetic interference (EMI). The inner cover is preferably an insulating molded plastic part with a thin metallic coating.

公开(公告)号：WO2006104712A3

公开(公告)日：2007-03-01

申请号：PCT/US2006009604

申请日：2006-03-16

Applicant: ROSEMOUNT INC ,  LONGSDORF RANDY J ,  HUISENGA GARRIE D ,  JOHNSON JAMES A

Inventor： LONGSDORF RANDY J ,  HUISENGA GARRIE D ,  JOHNSON JAMES A

IPC: G08C19/02 ,  G01R19/25

CPC classification number: G01R19/2509 ,  G05B19/0425 ,  G05B2219/25189 ,  G05B2219/25428 ,  G08C19/02

Abstract: A process device (12) is configured for coupling to a two wire process control loop (18) . Loop current output circuitry (60) is configured to apply an output current to the two wire process control loop (18) . Loop current verification circuitry (64) is coupled to the two wire process control loop (18) and configured to detect errors in the applied output current. At least a portion of the loop current verification circuitry (64) is independent from the loop current output circuitry (60) .

Abstract translation: 处理装置（12）被配置为耦合到双线过程控制回路（18）。 环路电流输出电路（60）被配置为向双线过程控制回路（18）施加输出电流。 环路电流验证电路（64）耦合到两线制过程控制回路（18）并被配置为检测所施加的输出电流中的误差。 环路电流验证电路（64）的至少一部分与环路电流输出电路（60）无关。

公开(公告)号：WO2008045258B1

公开(公告)日：2008-07-24

申请号：PCT/US2007021242

申请日：2007-10-03

Applicant: ROSEMOUNT INC ,  HUISENGA GARRIE D ,  LONGSDORF RANDY J ,  LATTIMER DONALD R

Inventor： HUISENGA GARRIE D ,  LONGSDORF RANDY J ,  LATTIMER DONALD R

IPC: G05B23/02 ,  H04L1/24

CPC classification number: H04L1/24

Abstract: A diagnostic device (50) for coupling to a process control loop (18) includes digital communication circuitry (52) configured to receive a digital communication signal from the process control loop (18). The digital communication signal is a digitally modulated analog signal on the process control loop (18) which is modulated to a plurality of discrete analog signal levels representative of digital values. Diagnostic circuitry (54) diagnoses operation of the process control loop (18) which may include field devices of the process control loop based upon the digitally modulated analog signal.

公开(公告)号：WO2008045258A3

公开(公告)日：2008-05-29

申请号：PCT/US2007021242

申请日：2007-10-03

Applicant: ROSEMOUNT INC ,  HUISENGA GARRIE D ,  LONGSDORF RANDY J ,  LATTIMER DONALD R

Inventor： HUISENGA GARRIE D ,  LONGSDORF RANDY J ,  LATTIMER DONALD R

IPC: G05B23/02 ,  H04L1/24

CPC classification number: H04L1/24

Abstract: A diagnostic device (50) for coupling to a process control loop (18) includes digital communication circuitry (52) configured to receive a digital communication signal from the process control loop (18). The digital communication signal is a digitally modulated analog signal on the process control loop (18) which is modulated to a plurality of discrete analog signal levels representative of digital values. Diagnostic circuitry (54) diagnoses operation of the process control loop (18) which may include field devices of the process control loop based upon the digitally modulated analog signal.

Abstract translation: 用于耦合到过程控制回路（18）的诊断设备（50）包括被配置为从过程控制回路（18）接收数字通信信号的数字通信电路（52）。 数字通信信号是过程控制回路（18）上的数字调制模拟信号，其被调制为代表数字值的多个离散模拟信号电平。 诊断电路（54）基于数字调制的模拟信号来诊断过程控制回路（18）的操作，过程控制回路（18）可以包括过程控制回路的现场设备。