[go: up one dir, main page]

WO2014170051A1 - Transducteur de mesure pour l'instrumentation de processus et procédé de diagnostic correspondant - Google Patents

Transducteur de mesure pour l'instrumentation de processus et procédé de diagnostic correspondant Download PDF

Info

Publication number
WO2014170051A1
WO2014170051A1 PCT/EP2014/053215 EP2014053215W WO2014170051A1 WO 2014170051 A1 WO2014170051 A1 WO 2014170051A1 EP 2014053215 W EP2014053215 W EP 2014053215W WO 2014170051 A1 WO2014170051 A1 WO 2014170051A1
Authority
WO
WIPO (PCT)
Prior art keywords
analog
digital
switch
transmitter
values
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.)
Ceased
Application number
PCT/EP2014/053215
Other languages
German (de)
English (en)
Inventor
Eric Chemisky
Slava Friesen
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2014170051A1 publication Critical patent/WO2014170051A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/225—Measuring circuits therefor
    • G01L1/2262—Measuring circuits therefor involving simple electrical bridges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2829—Testing of circuits in sensor or actuator systems

Definitions

  • the invention relates to a transmitter forificatinstru- menttechnik with a sensor for detecting a physical or chemical quantity according to the preamble of claim 1 and a method for diagnosing the transmitter according to the preamble of claim 6.
  • Transmitters for example, are used to capture process variables, eg. As temperature, pressure, flow, level, density or gas concentration of a medium.
  • a sensor which often leads to a Wheatstone bridge-connected measuring resistors which are applied to a planar substrate, the physical or chemical ⁇ specific size is converted into an electrical measurement signal.
  • This substrate serves as a mechanical mounting of the loan sensitive sensor on a support and also as a protection against external influences, for example to improve the elekt ⁇ romagnetician compatibility.
  • one possibility for applying measuring resistances of the sensor to the substrate is to embed these resistors in the substrate and to dope the substrate in the vicinity of these resistors, wherein an electrical contact exists between the resistors and the substrate.
  • a PN junction in the manner of a diode provides geeig ⁇ netem voltage application for an electrical separation of the resistors from the substrate. Electrical lines, which
  • Lead signals from the sensor to external contacts are connected to the evaluation of the signals to a control and evaluation, which for example via a field bus ei ⁇ nen corresponding to the respective pressure reading to a control station or a programmable logic controller ⁇ out .
  • a transmitter to process instrumentation in which the state of a sub ⁇ strats, the measuring resistors of a sensor for generating a measuring signal carries nation is monitored for changes caused by chemical contamination.
  • the measuring resistors and their connecting cables are monitored for breakage, ie for electrical interruption.
  • the detection of a sensor break can take place, for example, by measuring the current consumption of the measuring resistors connected to a Wheatstone bridge.
  • a detection of a malfunction of an analog-to-digital converter, which converts the analog Mess ⁇ signal into a digital measurement signal in the form of a temporal sequence of digital values for further processing is not described.
  • the invention has for its object to provide a transmitter for process instrumentation, in which malfunction of the analog-to-digital converter with comparatively simple means and yet reliably detectable.
  • the new transmitter of the type mentioned in the characterizing part of claim 1 features.
  • advantageous developments of the invention and claim 6 in a diagnostic method are described.
  • the invention has the advantage that in a particularly simple manner and with little effort an analog-to-digital converter, which is provided in a transmitter for converting an analog measurement signal into a digital measurement signal, can be monitored for cor ⁇ proper function.
  • the above-mentioned disadvantages of a redundant design of the analog-to-digital conversion by using a second analog-to-digital converter, which is connected in parallel to the first, are avoided.
  • the current consumption of the transmitter is possibly increased un ⁇ substantially and there is no further, associated with high costs analog-to-digital converter required.
  • the diagnosis of the analog-to-digital converter only one or two additional resistors and switches are required, the additional circuit complexity and space required for the Reali ⁇ tion of the invention is comparatively low.
  • the comparatively simple processing of the digital measurement signals detected in the various switch positions is advantageous, since it requires only a small part of the computing power present in the transmitter. For the evaluation, only simple arithmetic and comparison operations are to be carried out.
  • the transmitter issues an error message and a process in which the transmitter is used if necessary be brought to a safe state.
  • SFF Safe Failure Fraction
  • ground potential of the transmitter is pre ⁇ determined as a reference potential, with which the center tap of the voltage divider of the Wheatstone bridge through the series circuit of a resistor and a switch is connectable.
  • the value of the resistance is advantageously chosen to be approximately ten to one hundred times the value of a measuring resistor connected in the bridge.
  • This has the advantage that the relative deviations of the digital measurement signals respectively determined in the various switching states are in the range of a few percent and can thus be easily evaluated for diagnosis.
  • resistors can be calculated in a simple manner, which jump heights of the digital measurement values at Heidelbergvorgän- conditions are to be expected in faultless condition.
  • the diagnosis ⁇ evaluation is particularly simple and still leads to a reliable diagnosis statement, if the detection of a fault, the deviations determined during the diagnosis are then monitored to see whether they are outside a Tole ⁇ ranz Schemes, which includes the expected jump height, are.
  • the upper limit and the lower limit of the respective tolerance range can be precalculated so that fluctuations that are due to component variations or temperature changes and are within a permissible range, do not lead to an erroneous fault diagnosis.
  • the digital measurement signal which has been determined is closed for the purpose of diagnosing the first or second switch to correct the expected in the respective operating ⁇ preparing deviation from the measurement with an open switch.
  • the correct measurement of the physical or chemical quantity can be generated even with diagnostic purposes CLOSED ⁇ senem switch and there is no interruption of the measurements through the diagnostic process.
  • Figure 1 is a circuit diagram of an embodiment
  • FIG. 2 shows a timing diagram of a digital measurement signal.
  • parts of a transmitter 1 are merely Darge ⁇ is serving for detecting a physical or chemical quantity, such as a pressure.
  • a substrate which is designed as a pressure-sensitive membrane
  • four strain-sensitive resistors R1 ... R4 of a sensor S are connected to form a Wheatstone bridge.
  • bil ⁇ the two resistors Rl and R2 a first voltage divider with a center tap X +, which is connected between a reference voltage Vref and ground potential.
  • the ⁇ at the resistors R3 and R4 having a center tap X- are connected as a second voltage divider for the first voltage divider in the Wheatstone bridge parallel.
  • a current-limiting resistor R5 is connected between a supply voltage VCC and the reference voltage Vref, which is kept constant during operation of the Sen ⁇ S sors substantially. Between the center taps X + and X- a voltage can be tapped whose level corresponds to the respective pressure and which in the ge ⁇ showed embodiment, an analog measurement signal Um, which is generated by the sensor S represents.
  • the measurement signal To is due to two inputs Inl and In2 to an analog-to-digital converter ADC which the analog signal into a time sequence of digital values, which will be referred to as a digital measurement signal ⁇ p, converts.
  • the reference voltage Vref is also performed on ei ⁇ NEN input Ref of the analog-to-digital converter ADC. Since ⁇ by a ratiometric measurement of the analog Messsig- is Nals To possible.
  • the analog-to-digital converter ADC is part of a control and evaluation device 2, wherein the analog measurement signal to a measurement value for the physical or chemical quantity, in the ⁇ sem example the pressure, further processed, the at A ⁇ set of the transmitter 1 in a process engineering plant, for example, to an automation device or a Leit ⁇ station via a fieldbus 3 is output.
  • the center tap X + of the first voltage divider with resistors Rl, R2 is connected via a series circuit of a resistor Rbl and a switch Ql with ground potential as Be ⁇ zugspotential.
  • a corresponding series connection of a resistor Rb2 and a switch Q2 is provided for the center tap X- of the second voltage divider, which is formed from the resistors R3 and R4.
  • Switch Ql and closed first switch Ql are generated, can be expected in error-free state, can be calculated and stored in a known manner with known dimensioning of the resistors R1 ... R5, the resistor Rbl and the supply voltage VCC.
  • FIG. 2 shows in a time diagram an example of a course 20 of the digital measurement signal p.
  • the course 20 in FIG. 2 is obtained with a faultless transmitter.
  • Different states ZI, Z2 and Z3 are marked on the axis of time t.
  • a state ZI the two switches Q1 and Q2 are opened, and a digital measuring signal p corresponding to the respective pressure is established with a value p1.
  • Closing of the switch Q1 is transferred from the state ZI to a new state Z2, in which the digital measurement signal p has the value p2.
  • a deviation ⁇ between the Values p2 and pl correspond to an expected value determined at startup or by calculation. It can thus be stated that there is no error in the analog-to-digital converter ADC and in the region of the first voltage divider with the resistors R1 and R2 (FIG. 1).
  • the first switch Q1 is opened again and the second switch Q2 is closed.
  • wel ⁇ cher is the deviation ⁇ higher than the value in the state pl ZI. Since the deviation ⁇ also corresponds to the expected deviation in the state Z3, there is no error even in the second voltage divider comprising the resistors R3 and R4 (FIG. 1).
  • the state Z3 is again followed by the state ZI, in which the two switches Q1 and Q2 are open for normal measuring operation.
  • the transmitter diagnosis additionally provided states Z2 and / or Z3, controlled by the control and evaluation device 2, cyclically in periodic Zeitab- Stands, event-driven or on request, which is given in ⁇ example via the fieldbus 3 or a control device on site, be taken.
  • a predetermined upper limit ⁇ Amax and a predetermined lower limit of the amine from ⁇ deviation ⁇ are shown in Figure 2, defining a tolerance range within which a good state of the transmitter is determined at diagnosis.
  • a deviation is present which is greater than the upper limit Amax, an error is detected, wherein it is Example ⁇ as a fraction of the sensor S, tearing of a bonding Wired or a defect in the analog-to-digital converter can be yours.
  • the cause may be in ⁇ play, the analog-to-digital converter or this might upstream multiplexer, which may be provided in transmitters for example, to different analogue signals with to digitize the same analog-to-digital converter.
  • a diagnosis is thus obtained, which he ⁇ laubt to detect errors in an analog-to-digital converter or a possibly upstream multiplexer and a sensor breakage or cracking of the bonding wires to bridge outputs of the sensor.
  • no additional analog-to-digital converter is required in an advantageous manner.
  • the absence of an additional analog-to-digital converter has a favorable effect on the current consumption of the transmitter. This is a great advantage especially for transducers with 4 to 20 mA interface, since only a very limited power supply is available for the operation of the transmitter stands.
  • the abandonment of a second analog-to-digital converter represents a significant reduction in manufacturing costs and the space required for the control and evaluation ⁇ device. Since now errors of the analog-to-digital converter in addition to sensor, resistance or supply line break are detectable , a further increase in the safe-fai- lure fraction is achieved by the new diagnosis.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

L'invention concerne un transducteur de mesure (1), destiné à l'instrumentation de processus, qui comprend un capteur (S) servant à détecter une grandeur physique ou chimique, le capteur (S) comportant des résistances de mesure (R1...R4) câblées en pont de Wheatstone afin de générer un signal de mesure analogique (Um). Pour effectuer un diagnostic du transducteur de mesure, une prise médiane (X+) d'au moins un premier diviseur de tension du pont de Wheatstone est reliée par intermittence à un potentiel de référence par le biais d'un circuit en série constitué d'au moins une première résistance (Rb1) et d'un premier commutateur (Q1). Lorsque le premier commutateur (Q1) est ouvert ou fermé, un système de commande et d'évaluation (2) détermine les valeurs (p1 ; p2) respectives d'un signal de mesure numérique (p) fourni par un convertisseur analogique/numérique (ADC) à partir du signal de mesure analogique (Um). Si l'écart (∆) entre les deux valeurs (p1 ; p2) se situe en dehors d'une plage de tolérance prédéfinie, un défaut du transducteur de mesure (1), en particulier du convertisseur analogique/numérique (ADC), est détecté et affiché. Ceci présente l'avantage de ne pas nécessiter de second convertisseur analogique/numérique pour surveiller d'éventuels dysfonctionnements du convertisseur analogique/numérique (ADC).
PCT/EP2014/053215 2013-04-15 2014-02-19 Transducteur de mesure pour l'instrumentation de processus et procédé de diagnostic correspondant Ceased WO2014170051A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013206646.5 2013-04-15
DE201310206646 DE102013206646A1 (de) 2013-04-15 2013-04-15 Messumformer zur Prozessinstrumentierung und Verfahren zu dessen Diagnose

Publications (1)

Publication Number Publication Date
WO2014170051A1 true WO2014170051A1 (fr) 2014-10-23

Family

ID=50193454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/053215 Ceased WO2014170051A1 (fr) 2013-04-15 2014-02-19 Transducteur de mesure pour l'instrumentation de processus et procédé de diagnostic correspondant

Country Status (2)

Country Link
DE (1) DE102013206646A1 (fr)
WO (1) WO2014170051A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016138597A1 (fr) 2015-03-03 2016-09-09 Tecpharma Licensing Ag Dispositif de pont de mesure avec détection d'erreur améliorée
CN110794108A (zh) * 2019-11-18 2020-02-14 天健创新（北京）监测仪表股份有限公司 一种液体监测传感器状态的自动检测方法及装置
WO2020084902A1 (fr) * 2018-10-26 2020-04-30 富士電機株式会社 Capteur de pression

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107209079B (zh) * 2014-12-08 2020-11-03 舍弗勒技术股份两合公司 压力测量装置和具有液压线路的离合器执行器装置
DE102015001980A1 (de) * 2015-02-16 2016-08-18 Lucas Automotive Gmbh Vorrichtung und Verfahren zur Messung eines Fluiddrucks und zur Verifizierung des gemessenen Fluiddrucks
WO2021127805A1 (fr) * 2019-12-23 2021-07-01 深圳市英威腾电气股份有限公司 Dispositif de sécurité fonctionnelle pour convertisseur de fréquence
DE102020212329B4 (de) 2020-09-30 2022-08-18 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Testen eines Sensors und elektronische Schaltung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06347317A (ja) * 1993-06-11 1994-12-22 Yamato Scale Co Ltd ロードセルの故障検出装置及び自己補償装置
DE4323380A1 (de) * 1993-07-13 1995-01-19 Wabco Vermoegensverwaltung Verfahren und Schaltung zur Fehlererkennung bei Widerstands-Meßbrücken
US5499526A (en) * 1991-10-14 1996-03-19 Nissan Motor Co., Ltd. Semiconductor sensor self-checking circuit
US5631602A (en) * 1995-08-07 1997-05-20 Delco Electronics Corporation Wheatstone bridge amplifier circuit with integrated diagnostic testing
US6646446B2 (en) * 2000-09-20 2003-11-11 Texas Instruments Incorporated Method and apparatus for fault detection in a resistive bridge sensor
DE102007025001A1 (de) * 2007-05-30 2008-12-04 Infineon Technologies Ag Messbrückenanordnung, Verfahren zum Testen einer Messbrücke, Testanordnung zum Testen einer Messbrücke, Verfahren zum Herstellen einer getesteten Messbrückenanordnung und Computerprogramm
EP2269009B1 (fr) 2008-04-25 2011-12-28 Siemens Aktiengesellschaft Transducteur de mesure pour l'instrumentation de procédés et procédé pour contrôler l'état du capteur de ce transducteur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19603340A1 (de) * 1996-01-31 1997-08-07 Bosch Gmbh Robert Einrichtung zur Bestimmung des Durchsatzes eines strömenden Mediums
DE10347038A1 (de) * 2003-10-07 2005-05-25 Zentrum Mikroelektronik Dresden Ag Verfahren und Schaltungsanordnung zur Ermittlung der Alterung von Sensoren
US7031863B2 (en) * 2003-12-22 2006-04-18 Texas Instruments Incorporated Variable condition responsive sense system and method
JP2012198175A (ja) * 2011-03-23 2012-10-18 Suzuki Motor Corp バッテリ状態監視装置
GB2489941A (en) * 2011-04-11 2012-10-17 Melexis Tessenderlo Nv Fault detection in difference measurement circuit-based sensors by changing the read-out configuration

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5499526A (en) * 1991-10-14 1996-03-19 Nissan Motor Co., Ltd. Semiconductor sensor self-checking circuit
JPH06347317A (ja) * 1993-06-11 1994-12-22 Yamato Scale Co Ltd ロードセルの故障検出装置及び自己補償装置
DE4323380A1 (de) * 1993-07-13 1995-01-19 Wabco Vermoegensverwaltung Verfahren und Schaltung zur Fehlererkennung bei Widerstands-Meßbrücken
US5631602A (en) * 1995-08-07 1997-05-20 Delco Electronics Corporation Wheatstone bridge amplifier circuit with integrated diagnostic testing
US6646446B2 (en) * 2000-09-20 2003-11-11 Texas Instruments Incorporated Method and apparatus for fault detection in a resistive bridge sensor
DE102007025001A1 (de) * 2007-05-30 2008-12-04 Infineon Technologies Ag Messbrückenanordnung, Verfahren zum Testen einer Messbrücke, Testanordnung zum Testen einer Messbrücke, Verfahren zum Herstellen einer getesteten Messbrückenanordnung und Computerprogramm
EP2269009B1 (fr) 2008-04-25 2011-12-28 Siemens Aktiengesellschaft Transducteur de mesure pour l'instrumentation de procédés et procédé pour contrôler l'état du capteur de ce transducteur

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016138597A1 (fr) 2015-03-03 2016-09-09 Tecpharma Licensing Ag Dispositif de pont de mesure avec détection d'erreur améliorée
CN107257915A (zh) * 2015-03-03 2017-10-17 特克法马许可公司 具有改进的故障识别的测量电桥组件
CN107257915B (zh) * 2015-03-03 2020-06-05 特克法马许可公司 具有改进的故障识别的测量电桥组件和方法
US10983187B2 (en) 2015-03-03 2021-04-20 Ypsomed Ag Measuring bridge arrangement with improved error detection
WO2020084902A1 (fr) * 2018-10-26 2020-04-30 富士電機株式会社 Capteur de pression
JPWO2020084902A1 (ja) * 2018-10-26 2021-03-25 富士電機株式会社 圧力センサ
CN110794108A (zh) * 2019-11-18 2020-02-14 天健创新（北京）监测仪表股份有限公司 一种液体监测传感器状态的自动检测方法及装置

Also Published As

Publication number Publication date
DE102013206646A1 (de) 2014-10-16

Similar Documents

Publication Publication Date Title
WO2014170051A1 (fr) Transducteur de mesure pour l'instrumentation de processus et procédé de diagnostic correspondant
EP3265754B1 (fr) Dispositif de pont de mesure avec détection d'erreur améliorée
EP2269009B1 (fr) Transducteur de mesure pour l'instrumentation de procédés et procédé pour contrôler l'état du capteur de ce transducteur
EP2246984B1 (fr) Appareil de diagnostic destinée au contrôle d'un appareil de conversion analogique-numérique
DE102007054672A1 (de) Feldgerät zur Bestimmung oder Überwachung einer Prozessgröße in der Prozessautomatisierung
DE19905071A1 (de) Meßumformer sowie Verfahren zur Diagnose der Versorgung eines Meßumformers
EP2187175B1 (fr) Convertisseur de mesure
DE102009026785A1 (de) Feldgerät zur Bestimmung und/oder Überwachung einer physikalischen oder chemischen Prozessgröße
DE102017126754B4 (de) Eingangsschaltung zum fehlersicheren Einlesen eines analogen Eingangssignals
EP2494313A2 (fr) Appareil de terrain pour l'instrumentation de processus
DE102013200330A1 (de) Zweikanaliger Sicherheitssensor
EP1915631A1 (fr) Procede et systeme pour controler une premiere valeur de tension
DE102005016127A1 (de) Sensorsystem
WO2012041593A2 (fr) Procédé de récupération destiné à un appareil comportant une sortie de courant analogique pour l'émission d'une valeur de mesure ou d'une valeur de réglage
DE102018206804A1 (de) Erkennung von Unterbrechungen eines Stromkreises
EP2981793B1 (fr) Convertisseur de mesure pour instrumenter un procédé et methode de surveillance de l'état de ses capteurs
DE102009002734A1 (de) Feldgerät zur Bestimmung oder Überwachung einer Prozessgröße in der Prozessautomatisierung
DE102020212329B4 (de) Verfahren zum Testen eines Sensors und elektronische Schaltung
DE102006024742A1 (de) Messumformer
EP2090945B1 (fr) Composant de saisie et procédé de détection d'erreurs
EP1894028B1 (fr) Procede d'identification des fautes des composants d'un circuit analogue de traitement de signaux pour un transducteur de mesure
DE102015102486B4 (de) Feldgerät zur Bestimmung einer Messgröße und Verfahren zum Kommunizieren
DE10027096A1 (de) Sensorvorrichtung
DE102020203653A1 (de) Eingangsvorrichtung, Steuerungsgerät und Verfahren zum Betrieb einer Eingangsvorrichtung
DE102022104993A1 (de) Anordnung zur sicherheitsgerichteten Überwachung eines Füllstandes in einem Behälter

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14707686

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14707686

Country of ref document: EP

Kind code of ref document: A1