HK135094A - Digital converter apparatus for improving the output of a two-wire transmitter - Google Patents

Digital converter apparatus for improving the output of a two-wire transmitter

Info

Publication number
HK135094A
HK135094A HK135094A HK135094A HK135094A HK 135094 A HK135094 A HK 135094A HK 135094 A HK135094 A HK 135094A HK 135094 A HK135094 A HK 135094A HK 135094 A HK135094 A HK 135094A
Authority
HK
Hong Kong
Prior art keywords
output
digital converter
improving
converter apparatus
wire transmitter
Prior art date
Application number
HK135094A
Inventor
John A Kielb
Richard L Nelson
David L Pederson
Original Assignee
Rosemount Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosemount Inc filed Critical Rosemount Inc
Publication of HK135094A publication Critical patent/HK135094A/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
    • G08C19/04—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage using variable resistance
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Communication Cables (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Electric Cable Installation (AREA)
  • Transmitters (AREA)
  • Tires In General (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

An existing analog two-wire transmitter (11) has a sensor module (35), and analog circuits (23) which provide an output representative of a sensed process variable, such as pressure, to a two-wire current loop (14). At least portions of the analog circuit (23) are removed and replaced with apparatus including a digital converter (52) that digitally calculates the transmitter output using the same current range in the current loop (14) and calculating corrections for obtaining linearity of the output.
HK135094A 1986-10-02 1994-12-01 Digital converter apparatus for improving the output of a two-wire transmitter HK135094A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91464886A 1986-10-02 1986-10-02
PCT/US1987/002448 WO1988002528A1 (en) 1986-10-02 1987-09-24 Digital converter apparatus for improving the output of a two-wire transmitter

Publications (1)

Publication Number Publication Date
HK135094A true HK135094A (en) 1994-12-09

Family

ID=25434614

Family Applications (1)

Application Number Title Priority Date Filing Date
HK135094A HK135094A (en) 1986-10-02 1994-12-01 Digital converter apparatus for improving the output of a two-wire transmitter

Country Status (18)

Country Link
EP (1) EP0324784B1 (en)
JP (1) JP2529874B2 (en)
KR (1) KR960014487B1 (en)
CN (1) CN1014450B (en)
AT (1) ATE109295T1 (en)
AU (1) AU611649B2 (en)
CA (1) CA1334994C (en)
DE (1) DE3750297T2 (en)
DK (1) DK171303B1 (en)
ES (1) ES2005363A6 (en)
HK (1) HK135094A (en)
IL (1) IL84004A (en)
IN (1) IN170265B (en)
MX (1) MX160488A (en)
NO (1) NO300566B1 (en)
WO (1) WO1988002528A1 (en)
YU (1) YU183987A (en)
ZA (1) ZA877271B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59814313D1 (en) 1998-09-07 2008-12-11 Endress & Hauser Gmbh & Co Kg end station
DE19930661A1 (en) * 1999-07-02 2001-01-18 Siemens Ag Transmitter
US8446977B2 (en) * 2007-09-12 2013-05-21 Valery Vasilievich Ovchinnikov Method for transmitting discrete electric signals
US9217653B2 (en) * 2007-09-13 2015-12-22 Rosemount Inc. High performance architecture for process transmitters
DE102008050354A1 (en) * 2008-10-02 2010-04-08 Siemens Aktiengesellschaft transmitters
US9281088B2 (en) 2010-06-07 2016-03-08 Rosemount Inc. Instrument for nuclear power facility
US8578783B2 (en) * 2011-09-26 2013-11-12 Rosemount Inc. Process fluid pressure transmitter with separated sensor and sensor electronics
RU2546576C2 (en) * 2012-06-05 2015-04-10 Федеральное государственное бюджетное учреждение науки Институт программных систем им. А.К. Айламазяна Российской академии наук (ИПС им. А.К. Айламазяна РАН) 4-20mA TRANSCEIVER
US10962622B2 (en) 2013-12-23 2021-03-30 Rosemount Inc. Analog process variable transmitter with electronic calibration
DE102016207289B3 (en) * 2016-04-28 2017-05-04 Siemens Aktiengesellschaft Field device for determining a process variable in process automation
CN110319857B (en) * 2019-08-05 2024-05-14 北京恒泰翔基科技有限公司 Sensor with high-resistance connection structure
KR102088874B1 (en) * 2019-10-08 2020-03-13 (주)다스 An Electric Detecting Device for Detecting an Orientation and a Horizontal Level

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250490A (en) * 1979-01-19 1981-02-10 Rosemount Inc. Two wire transmitter for converting a varying signal from a remote reactance sensor to a DC current signal
US4520488A (en) * 1981-03-02 1985-05-28 Honeywell, Inc. Communication system and method
US4419619A (en) * 1981-09-18 1983-12-06 Mcgraw-Edison Company Microprocessor controlled voltage regulating transformer
CH664637A5 (en) * 1982-04-28 1988-03-15 Cerberus Ag METHOD FOR TRANSMITTING MEASURED VALUES IN A MONITORING SYSTEM.
US4494183A (en) * 1982-06-17 1985-01-15 Honeywell Inc. Process variable transmitter having a non-interacting operating range adjustment
US4556866A (en) * 1983-03-16 1985-12-03 Honeywell Inc. Power line carrier FSK data system
JPS61142828A (en) * 1984-12-14 1986-06-30 Yokogawa Electric Corp 2-wire type data transmitter

Also Published As

Publication number Publication date
AU611649B2 (en) 1991-06-20
DK171303B1 (en) 1996-08-26
EP0324784B1 (en) 1994-07-27
AU8039387A (en) 1988-04-21
WO1988002528A1 (en) 1988-04-07
CN87106642A (en) 1988-06-22
ZA877271B (en) 1988-03-30
ATE109295T1 (en) 1994-08-15
IL84004A0 (en) 1988-02-29
JP2529874B2 (en) 1996-09-04
CA1334994C (en) 1995-03-28
NO882395L (en) 1988-05-31
MX160488A (en) 1990-03-12
NO300566B1 (en) 1997-06-16
EP0324784A1 (en) 1989-07-26
DK297588A (en) 1988-06-01
KR880701929A (en) 1988-11-07
NO882395D0 (en) 1988-05-31
DE3750297D1 (en) 1994-09-01
ES2005363A6 (en) 1989-03-01
EP0324784A4 (en) 1989-09-26
IN170265B (en) 1992-03-07
KR960014487B1 (en) 1996-10-16
DK297588D0 (en) 1988-06-01
DE3750297T2 (en) 1994-12-15
CN1014450B (en) 1991-10-23
IL84004A (en) 1992-05-25
JPH02500223A (en) 1990-01-25
YU183987A (en) 1990-08-31

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)