GB1534280A - Method and apparatus for testing thermocouples - Google Patents
Method and apparatus for testing thermocouplesInfo
- Publication number
- GB1534280A GB1534280A GB836975A GB836975A GB1534280A GB 1534280 A GB1534280 A GB 1534280A GB 836975 A GB836975 A GB 836975A GB 836975 A GB836975 A GB 836975A GB 1534280 A GB1534280 A GB 1534280A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thermocouple
- resistance
- voltage
- good
- thermocouples
- 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.)
- Expired
Links
- 238000012360 testing method Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 238000005259 measurement Methods 0.000 abstract 3
- 230000005856 abnormality Effects 0.000 abstract 1
- 238000010998 test method Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/026—Arrangements for signalling failure or disconnection of thermocouples
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
1534280 Testing thermocouples SOLARTRON ELECTRONIC GROUP Ltd 27 Feb 1976 [28 Feb 1975] 8369/75 Heading G1U In a method of testing a thermocouple, firstly the resistance of the thermocouple is measured and stored at an instant when the thermocouple is known to be in good working condition, and secondly the resistance is measured later and compared with the first measurement, any deviation outside a present range indicating an abnormality in the thermocouple. The method is described embodied in a system in which a plurality of thermocouples 14, each having hot 16 and cold 18 junctions, are sequentially scanned. Each thermocouple is tested, under the control of a sequence controller 70, by first measuring its resistance when it is known to be good, this being effected by- (a) with the switches in their positions shown, measuring the output voltage of the thermocouple and storing it 40, (b) closing switches 28, 30 so as to apply a constant current 36 through the thermocouple, and (c) changing over a contact 38 so that the resulting voltage from the thermocouple when the constant current is flowing (this voltage being the sum of the thermoelectric voltage and the I-R drop across the junction) has subtracted 44 from it the first measured voltage from the thermocouple, and storing 56 the difference which represents the resistance of the thermocouple. Having established the "good" resistance of the thermocouple, at some later instant a contact 52 is changed over, a further measurement of resistance - using steps (a) and (b) above is made - and the further measurement is compared 60 with the "good" resistance, any deviation that is too large producing an output 66. To test every thermocouple in the system, one store 56 per thermocouple will be required, and either the resistance measuring section can be repeated or it can be time shared.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB836975A GB1534280A (en) | 1975-02-28 | 1975-02-28 | Method and apparatus for testing thermocouples |
| DE19762603797 DE2603797A1 (en) | 1975-02-28 | 1976-02-02 | PROCEDURE FOR CHECKING A THERMOELEMENT AND DEVICE FOR ITS IMPLEMENTATION |
| FR7605001A FR2302514A1 (en) | 1975-02-28 | 1976-02-24 | METHOD AND DEVICE FOR TESTING THERMOCOUPLES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB836975A GB1534280A (en) | 1975-02-28 | 1975-02-28 | Method and apparatus for testing thermocouples |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1534280A true GB1534280A (en) | 1978-11-29 |
Family
ID=9851219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB836975A Expired GB1534280A (en) | 1975-02-28 | 1975-02-28 | Method and apparatus for testing thermocouples |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2603797A1 (en) |
| FR (1) | FR2302514A1 (en) |
| GB (1) | GB1534280A (en) |
Cited By (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6356191B1 (en) | 1999-06-17 | 2002-03-12 | Rosemount Inc. | Error compensation for a process fluid temperature transmitter |
| US6370448B1 (en) | 1997-10-13 | 2002-04-09 | Rosemount Inc. | Communication technique for field devices in industrial processes |
| US6397114B1 (en) | 1996-03-28 | 2002-05-28 | Rosemount Inc. | Device in a process system for detecting events |
| US6434504B1 (en) | 1996-11-07 | 2002-08-13 | Rosemount Inc. | Resistance based process control device diagnostics |
| US6449574B1 (en) | 1996-11-07 | 2002-09-10 | Micro Motion, Inc. | Resistance based process control device diagnostics |
| US6473710B1 (en) | 1999-07-01 | 2002-10-29 | Rosemount Inc. | Low power two-wire self validating temperature transmitter |
| US6505517B1 (en) | 1999-07-23 | 2003-01-14 | Rosemount Inc. | High accuracy signal processing for magnetic flowmeter |
| US6519546B1 (en) | 1996-11-07 | 2003-02-11 | Rosemount Inc. | Auto correcting temperature transmitter with resistance based sensor |
| US6539267B1 (en) | 1996-03-28 | 2003-03-25 | Rosemount Inc. | Device in a process system for determining statistical parameter |
| US6556145B1 (en) | 1999-09-24 | 2003-04-29 | Rosemount Inc. | Two-wire fluid temperature transmitter with thermocouple diagnostics |
| US6601005B1 (en) | 1996-11-07 | 2003-07-29 | Rosemount Inc. | Process device diagnostics using process variable sensor signal |
| US6611775B1 (en) | 1998-12-10 | 2003-08-26 | Rosemount Inc. | Electrode leakage diagnostics in a magnetic flow meter |
| US6615149B1 (en) | 1998-12-10 | 2003-09-02 | Rosemount Inc. | Spectral diagnostics in a magnetic flow meter |
| US6629059B2 (en) | 2001-05-14 | 2003-09-30 | Fisher-Rosemount Systems, Inc. | Hand held diagnostic and communication device with automatic bus detection |
| US6654697B1 (en) | 1996-03-28 | 2003-11-25 | Rosemount Inc. | Flow measurement with diagnostics |
| US6701274B1 (en) | 1999-08-27 | 2004-03-02 | Rosemount Inc. | Prediction of error magnitude in a pressure transmitter |
| US6735484B1 (en) | 2000-09-20 | 2004-05-11 | Fargo Electronics, Inc. | Printer with a process diagnostics system for detecting events |
| US6754601B1 (en) | 1996-11-07 | 2004-06-22 | Rosemount Inc. | Diagnostics for resistive elements of process devices |
| US6772036B2 (en) | 2001-08-30 | 2004-08-03 | Fisher-Rosemount Systems, Inc. | Control system using process model |
| US6859755B2 (en) | 2001-05-14 | 2005-02-22 | Rosemount Inc. | Diagnostics for industrial process control and measurement systems |
| US6907383B2 (en) | 1996-03-28 | 2005-06-14 | Rosemount Inc. | Flow diagnostic system |
| US6920799B1 (en) | 2004-04-15 | 2005-07-26 | Rosemount Inc. | Magnetic flow meter with reference electrode |
| US6970003B2 (en) | 2001-03-05 | 2005-11-29 | Rosemount Inc. | Electronics board life prediction of microprocessor-based transmitters |
| US7010459B2 (en) | 1999-06-25 | 2006-03-07 | Rosemount Inc. | Process device diagnostics using process variable sensor signal |
| US7018800B2 (en) | 2003-08-07 | 2006-03-28 | Rosemount Inc. | Process device with quiescent current diagnostics |
| RU2274838C1 (en) * | 2004-10-27 | 2006-04-20 | Общество с ограниченной ответственностью "Производственная компания "ТЕСЕЙ" | Device for testing quality of connection of electrodes in working soldered joint of thermo-electric transformer |
| US7046180B2 (en) | 2004-04-21 | 2006-05-16 | Rosemount Inc. | Analog-to-digital converter with range error detection |
| US7085610B2 (en) | 1996-03-28 | 2006-08-01 | Fisher-Rosemount Systems, Inc. | Root cause diagnostics |
| US7254518B2 (en) | 1996-03-28 | 2007-08-07 | Rosemount Inc. | Pressure transmitter with diagnostics |
| US7290450B2 (en) | 2003-07-18 | 2007-11-06 | Rosemount Inc. | Process diagnostics |
| US7321846B1 (en) | 2006-10-05 | 2008-01-22 | Rosemount Inc. | Two-wire process control loop diagnostics |
| US7523667B2 (en) | 2003-12-23 | 2009-04-28 | Rosemount Inc. | Diagnostics of impulse piping in an industrial process |
| US7590511B2 (en) | 2007-09-25 | 2009-09-15 | Rosemount Inc. | Field device for digital process control loop diagnostics |
| US7623932B2 (en) | 1996-03-28 | 2009-11-24 | Fisher-Rosemount Systems, Inc. | Rule set for root cause diagnostics |
| US7627441B2 (en) | 2003-09-30 | 2009-12-01 | Rosemount Inc. | Process device with vibration based diagnostics |
| US7630861B2 (en) | 1996-03-28 | 2009-12-08 | Rosemount Inc. | Dedicated process diagnostic device |
| US7750642B2 (en) | 2006-09-29 | 2010-07-06 | Rosemount Inc. | Magnetic flowmeter with verification |
| US7921734B2 (en) | 2009-05-12 | 2011-04-12 | Rosemount Inc. | System to detect poor process ground connections |
| US7940189B2 (en) | 2005-09-29 | 2011-05-10 | Rosemount Inc. | Leak detector for process valve |
| US7949495B2 (en) | 1996-03-28 | 2011-05-24 | Rosemount, Inc. | Process variable transmitter with diagnostics |
| US7953501B2 (en) | 2006-09-25 | 2011-05-31 | Fisher-Rosemount Systems, Inc. | Industrial process control loop monitor |
| US8112565B2 (en) | 2005-06-08 | 2012-02-07 | Fisher-Rosemount Systems, Inc. | Multi-protocol field device interface with automatic bus detection |
| US8290721B2 (en) | 1996-03-28 | 2012-10-16 | Rosemount Inc. | Flow measurement diagnostics |
| CN102901586A (en) * | 2011-07-25 | 2013-01-30 | 株式会社东芝 | Thermocouple abnormality detection system and detection method thereof |
| GB2507093A (en) * | 2012-10-18 | 2014-04-23 | Melexis Technologies Nv | Method and circuit for measuring the electrical resistance of a thermocouple |
| US8898036B2 (en) | 2007-08-06 | 2014-11-25 | Rosemount Inc. | Process variable transmitter with acceleration sensor |
| US9052240B2 (en) | 2012-06-29 | 2015-06-09 | Rosemount Inc. | Industrial process temperature transmitter with sensor stress diagnostics |
| US20150276498A1 (en) * | 2014-03-27 | 2015-10-01 | Rockwell Automation Technologies, Inc. | Thermocouple module with wire resistance compensation |
| US9207129B2 (en) | 2012-09-27 | 2015-12-08 | Rosemount Inc. | Process variable transmitter with EMF detection and correction |
| US9207670B2 (en) | 2011-03-21 | 2015-12-08 | Rosemount Inc. | Degrading sensor detection implemented within a transmitter |
| US9602122B2 (en) | 2012-09-28 | 2017-03-21 | Rosemount Inc. | Process variable measurement noise diagnostic |
| RU2789611C1 (en) * | 2022-06-30 | 2023-02-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Method for determining the reliability of the measurement results of a thermoelectric converter |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3145333C2 (en) * | 1981-11-14 | 1987-05-07 | Brown, Boveri & Cie Ag, 6800 Mannheim | Procedure for testing temperature sensors |
| US4590472A (en) * | 1982-12-01 | 1986-05-20 | General Electric Company | Analog signal conditioner for thermal coupled signals |
| WO1996011390A1 (en) * | 1994-10-08 | 1996-04-18 | Honeywell S.A. | Transmitter sensor |
| RU2129708C1 (en) * | 1997-06-30 | 1999-04-27 | Смелов Валерий Евгеньевич | Method testing correspondence of signals of thermoelectric temperature transducers to actual values of temperature |
| US7835295B2 (en) | 2005-07-19 | 2010-11-16 | Rosemount Inc. | Interface module with power over Ethernet function |
| US9634858B2 (en) | 2005-07-20 | 2017-04-25 | Rosemount Inc. | Field device with power over Ethernet |
| US8788070B2 (en) | 2006-09-26 | 2014-07-22 | Rosemount Inc. | Automatic field device service adviser |
| DE102008055697B4 (en) * | 2008-06-05 | 2017-12-21 | Continental Teves Ag & Co. Ohg | Electronic temperature measuring circuit |
-
1975
- 1975-02-28 GB GB836975A patent/GB1534280A/en not_active Expired
-
1976
- 1976-02-02 DE DE19762603797 patent/DE2603797A1/en not_active Withdrawn
- 1976-02-24 FR FR7605001A patent/FR2302514A1/en active Granted
Cited By (55)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6654697B1 (en) | 1996-03-28 | 2003-11-25 | Rosemount Inc. | Flow measurement with diagnostics |
| US6907383B2 (en) | 1996-03-28 | 2005-06-14 | Rosemount Inc. | Flow diagnostic system |
| US6397114B1 (en) | 1996-03-28 | 2002-05-28 | Rosemount Inc. | Device in a process system for detecting events |
| US7254518B2 (en) | 1996-03-28 | 2007-08-07 | Rosemount Inc. | Pressure transmitter with diagnostics |
| US7085610B2 (en) | 1996-03-28 | 2006-08-01 | Fisher-Rosemount Systems, Inc. | Root cause diagnostics |
| US7630861B2 (en) | 1996-03-28 | 2009-12-08 | Rosemount Inc. | Dedicated process diagnostic device |
| US7949495B2 (en) | 1996-03-28 | 2011-05-24 | Rosemount, Inc. | Process variable transmitter with diagnostics |
| US8290721B2 (en) | 1996-03-28 | 2012-10-16 | Rosemount Inc. | Flow measurement diagnostics |
| US7623932B2 (en) | 1996-03-28 | 2009-11-24 | Fisher-Rosemount Systems, Inc. | Rule set for root cause diagnostics |
| US6539267B1 (en) | 1996-03-28 | 2003-03-25 | Rosemount Inc. | Device in a process system for determining statistical parameter |
| US6532392B1 (en) | 1996-03-28 | 2003-03-11 | Rosemount Inc. | Transmitter with software for determining when to initiate diagnostics |
| US6434504B1 (en) | 1996-11-07 | 2002-08-13 | Rosemount Inc. | Resistance based process control device diagnostics |
| US6601005B1 (en) | 1996-11-07 | 2003-07-29 | Rosemount Inc. | Process device diagnostics using process variable sensor signal |
| US6519546B1 (en) | 1996-11-07 | 2003-02-11 | Rosemount Inc. | Auto correcting temperature transmitter with resistance based sensor |
| US6754601B1 (en) | 1996-11-07 | 2004-06-22 | Rosemount Inc. | Diagnostics for resistive elements of process devices |
| US6449574B1 (en) | 1996-11-07 | 2002-09-10 | Micro Motion, Inc. | Resistance based process control device diagnostics |
| US6370448B1 (en) | 1997-10-13 | 2002-04-09 | Rosemount Inc. | Communication technique for field devices in industrial processes |
| US6594603B1 (en) * | 1998-10-19 | 2003-07-15 | Rosemount Inc. | Resistive element diagnostics for process devices |
| US6615149B1 (en) | 1998-12-10 | 2003-09-02 | Rosemount Inc. | Spectral diagnostics in a magnetic flow meter |
| US6611775B1 (en) | 1998-12-10 | 2003-08-26 | Rosemount Inc. | Electrode leakage diagnostics in a magnetic flow meter |
| US6356191B1 (en) | 1999-06-17 | 2002-03-12 | Rosemount Inc. | Error compensation for a process fluid temperature transmitter |
| US7010459B2 (en) | 1999-06-25 | 2006-03-07 | Rosemount Inc. | Process device diagnostics using process variable sensor signal |
| US6473710B1 (en) | 1999-07-01 | 2002-10-29 | Rosemount Inc. | Low power two-wire self validating temperature transmitter |
| US6505517B1 (en) | 1999-07-23 | 2003-01-14 | Rosemount Inc. | High accuracy signal processing for magnetic flowmeter |
| US6701274B1 (en) | 1999-08-27 | 2004-03-02 | Rosemount Inc. | Prediction of error magnitude in a pressure transmitter |
| US6556145B1 (en) | 1999-09-24 | 2003-04-29 | Rosemount Inc. | Two-wire fluid temperature transmitter with thermocouple diagnostics |
| US6735484B1 (en) | 2000-09-20 | 2004-05-11 | Fargo Electronics, Inc. | Printer with a process diagnostics system for detecting events |
| US6970003B2 (en) | 2001-03-05 | 2005-11-29 | Rosemount Inc. | Electronics board life prediction of microprocessor-based transmitters |
| US6859755B2 (en) | 2001-05-14 | 2005-02-22 | Rosemount Inc. | Diagnostics for industrial process control and measurement systems |
| US6629059B2 (en) | 2001-05-14 | 2003-09-30 | Fisher-Rosemount Systems, Inc. | Hand held diagnostic and communication device with automatic bus detection |
| US6772036B2 (en) | 2001-08-30 | 2004-08-03 | Fisher-Rosemount Systems, Inc. | Control system using process model |
| US7290450B2 (en) | 2003-07-18 | 2007-11-06 | Rosemount Inc. | Process diagnostics |
| US7018800B2 (en) | 2003-08-07 | 2006-03-28 | Rosemount Inc. | Process device with quiescent current diagnostics |
| US7627441B2 (en) | 2003-09-30 | 2009-12-01 | Rosemount Inc. | Process device with vibration based diagnostics |
| US7523667B2 (en) | 2003-12-23 | 2009-04-28 | Rosemount Inc. | Diagnostics of impulse piping in an industrial process |
| US6920799B1 (en) | 2004-04-15 | 2005-07-26 | Rosemount Inc. | Magnetic flow meter with reference electrode |
| US7046180B2 (en) | 2004-04-21 | 2006-05-16 | Rosemount Inc. | Analog-to-digital converter with range error detection |
| RU2274838C1 (en) * | 2004-10-27 | 2006-04-20 | Общество с ограниченной ответственностью "Производственная компания "ТЕСЕЙ" | Device for testing quality of connection of electrodes in working soldered joint of thermo-electric transformer |
| US8112565B2 (en) | 2005-06-08 | 2012-02-07 | Fisher-Rosemount Systems, Inc. | Multi-protocol field device interface with automatic bus detection |
| US7940189B2 (en) | 2005-09-29 | 2011-05-10 | Rosemount Inc. | Leak detector for process valve |
| US7953501B2 (en) | 2006-09-25 | 2011-05-31 | Fisher-Rosemount Systems, Inc. | Industrial process control loop monitor |
| US7750642B2 (en) | 2006-09-29 | 2010-07-06 | Rosemount Inc. | Magnetic flowmeter with verification |
| US7321846B1 (en) | 2006-10-05 | 2008-01-22 | Rosemount Inc. | Two-wire process control loop diagnostics |
| US8898036B2 (en) | 2007-08-06 | 2014-11-25 | Rosemount Inc. | Process variable transmitter with acceleration sensor |
| US7590511B2 (en) | 2007-09-25 | 2009-09-15 | Rosemount Inc. | Field device for digital process control loop diagnostics |
| US7921734B2 (en) | 2009-05-12 | 2011-04-12 | Rosemount Inc. | System to detect poor process ground connections |
| US9207670B2 (en) | 2011-03-21 | 2015-12-08 | Rosemount Inc. | Degrading sensor detection implemented within a transmitter |
| CN102901586B (en) * | 2011-07-25 | 2015-07-29 | 株式会社东芝 | Thermocouple abnormality detection system and detection method thereof |
| CN102901586A (en) * | 2011-07-25 | 2013-01-30 | 株式会社东芝 | Thermocouple abnormality detection system and detection method thereof |
| US9052240B2 (en) | 2012-06-29 | 2015-06-09 | Rosemount Inc. | Industrial process temperature transmitter with sensor stress diagnostics |
| US9207129B2 (en) | 2012-09-27 | 2015-12-08 | Rosemount Inc. | Process variable transmitter with EMF detection and correction |
| US9602122B2 (en) | 2012-09-28 | 2017-03-21 | Rosemount Inc. | Process variable measurement noise diagnostic |
| GB2507093A (en) * | 2012-10-18 | 2014-04-23 | Melexis Technologies Nv | Method and circuit for measuring the electrical resistance of a thermocouple |
| US20150276498A1 (en) * | 2014-03-27 | 2015-10-01 | Rockwell Automation Technologies, Inc. | Thermocouple module with wire resistance compensation |
| RU2789611C1 (en) * | 2022-06-30 | 2023-02-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" | Method for determining the reliability of the measurement results of a thermoelectric converter |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2302514A1 (en) | 1976-09-24 |
| DE2603797A1 (en) | 1976-09-09 |
| FR2302514B1 (en) | 1978-08-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |