CA2322125A1 - Measuring instrument - Google Patents

Measuring instrument Download PDF

Info

Publication number
CA2322125A1
CA2322125A1 CA 2322125 CA2322125A CA2322125A1 CA 2322125 A1 CA2322125 A1 CA 2322125A1 CA 2322125 CA2322125 CA 2322125 CA 2322125 A CA2322125 A CA 2322125A CA 2322125 A1 CA2322125 A1 CA 2322125A1
Authority
CA
Canada
Prior art keywords
pair
measuring instrument
signal current
terminals
measure
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2322125
Other languages
French (fr)
Other versions
CA2322125C (en
Inventor
Wolfgang Lubcke
Peter Gerst
Jean-Gyl Capt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8239132&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2322125(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of CA2322125A1 publication Critical patent/CA2322125A1/en
Application granted granted Critical
Publication of CA2322125C publication Critical patent/CA2322125C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A description is given of a measuring instrument to be connected to a higher-order unit (57, 75) having at least a first and an identical second pair of terminals, which can be connected electrically, very simply and without errors, to the higher-order unit, the measuring instrument (61) comprising: a first pair of lines (1), to be connected to the first pair of terminals, via which a signal current flows during operation, the signal current being a measure of an instantaneous measured value, and a second pair of lines (3), to be connected to the second pair of terminals, via which a supply current flows during operation, whose value is greater than or equal to a minimum signal current and less than or equal to a maximum signal current. The measuring instrument may be used to measure, for example, pressure, temperature, or flow/level.
CA 2322125 1999-10-07 2000-10-03 Measuring instrument Expired - Lifetime CA2322125C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19990119840 EP1091332B1 (en) 1999-10-07 1999-10-07 Powerful double two wire measuring arrangement and device
EP99119840.9 1999-10-07

Publications (2)

Publication Number Publication Date
CA2322125A1 true CA2322125A1 (en) 2001-04-07
CA2322125C CA2322125C (en) 2005-12-06

Family

ID=8239132

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2322125 Expired - Lifetime CA2322125C (en) 1999-10-07 2000-10-03 Measuring instrument

Country Status (4)

Country Link
EP (2) EP1091332B1 (en)
JP (1) JP3553481B2 (en)
CA (1) CA2322125C (en)
DE (1) DE59913163D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20217612U1 (en) * 2002-11-13 2003-04-10 Centec Gmbh Measuring device for sound, density, flow and / or temperature measurement
DE10256623A1 (en) † 2002-12-03 2004-06-24 Krohne Meßtechnik GmbH & Co KG Electrical device and method for operating an electrical device
DE102007006027B4 (en) * 2007-02-07 2010-12-09 Knick Elektronische Messgeräte GmbH & Co. KG Electrical measuring device, in particular two-wire measuring device
DE102007042741B3 (en) * 2007-09-07 2008-12-04 Knick Elektronische Messgeräte GmbH & Co. KG Measuring transducer arrangement for recording and technical-signal forwarding of measured variables, has measuring transducer and two measurement inputs, where two double-pole signal outputs release two signal flows
DE102010061433B4 (en) * 2010-12-21 2013-04-04 Phoenix Contact Gmbh & Co. Kg Voltage regulation for output transistor of a signal output stage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1311032C (en) * 1989-03-31 1992-12-01 Stanley Chlebda Two-wire telemetering system including power regulated transmitting device
US5416723A (en) * 1993-03-03 1995-05-16 Milltronics Ltd. Loop powered process control transmitter
DE4426765C1 (en) * 1994-07-25 1996-01-18 Siemens Ag Two-wire transducer to four-wire measurement system, matching circuit

Also Published As

Publication number Publication date
EP1091332B1 (en) 2006-03-01
DE59913163D1 (en) 2006-04-27
EP1091332A1 (en) 2001-04-11
JP3553481B2 (en) 2004-08-11
CA2322125C (en) 2005-12-06
JP2001134887A (en) 2001-05-18
EP1553538A1 (en) 2005-07-13

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MKEX Expiry

Effective date: 20201005