EP1287511A2 - Zwei-leiter-messgerät, verfahren zu dessen prüfung und prüfanordnung dafür - Google Patents
Zwei-leiter-messgerät, verfahren zu dessen prüfung und prüfanordnung dafürInfo
- Publication number
- EP1287511A2 EP1287511A2 EP01943257A EP01943257A EP1287511A2 EP 1287511 A2 EP1287511 A2 EP 1287511A2 EP 01943257 A EP01943257 A EP 01943257A EP 01943257 A EP01943257 A EP 01943257A EP 1287511 A2 EP1287511 A2 EP 1287511A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring device
- iec
- current
- electrical system
- transport
- 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
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
Definitions
- the invention relates to two-wire measuring devices, methods for testing them and test arrangements suitable therefor.
- two-wire measuring devices are measuring devices which only have two wires L1, L2, which enable their electrical connection from and to the outside. These two conductors must be used both for the energy supply and for the transmission of a measurement signal generated by the measuring device.
- the measurement signal values output by the two-wire measuring device are direct currents assigned to a standardized range from 4 mA to 20 mA in such a way that a current value within this range corresponds exactly to one measurement signal value.
- the above-mentioned energy supply takes place by means of a DC voltage source G connected to the two conductors from the outside during operation and emitting a DC voltage and belonging to a primary network NP, so that a so-called current loop closes.
- This loop also contains a current measuring resistor Rm, at which a voltage proportional to the current value and thus to the measurement signal can be tapped outside the measuring device and processed further.
- the resistance Rm can be located far away from the two-wire measuring device MS ⁇ ; then it is connected to it via correspondingly long lines.
- the one pole NPl of the primary network NP with the conductor L1 of the two-wire measuring device MS "and the other pole NP2 connected to one connection of the resistor Rin, while the other connection is connected to the conductor L2 as an indirect second primary network connection NP2.
- digital signals can also be transmitted on the two conductors L1, L2 in accordance with one of the customary standards, such as the so-called HART protocol.
- the HART protocol (HART is a registered trademark of the HART User Group and the acronym for “Highway
- the HART protocol enables communication between a field and a process control level with the advantage of the simultaneous portability of an analog measurement signal according to the 4 mA to 20 mA standard and the digital HART signal for, commissioning, maintenance, dep rage or control of the measuring devices at the field level.
- EMC electromagnetic compatibility
- test regulations presuppose that the primary network, which is used for energy supply and originates from the direct voltage source Q, also generates high-energy interference pulses in addition to the direct voltage, which a two-wire measuring device MS ⁇ connected to the network must withstand.
- These test regulations reproduce real conditions as they occur in practice when two-wire measuring devices are to be used, for example, on means of transport, especially on ships.
- the interference pulses mentioned are often present in the primary on-board electrical system NP installed on ships, cf. 1.
- the two conductors L1, L2 of today's two-conductor measuring devices have to be tested with the test signals provided by the standard IEC 1000-4-5: 1995 for energy supply lines, and they are therefore resistant to these test signals dimension.
- Primary on-board electrical system NP serve to generate interference.
- a still further object of the invention is to provide a test arrangement for testing a two-wire measuring device for electromagnetic compatibility, which is intended for operation in a means of transport, in particular in a ship.
- Source circuit comes, and the two-wire measuring device is designed so that it cannot be certified for electromagnetic compatibility according to the applicable standard IEC-1000-4-5.
- a second variant of the invention consists in a test method of a two-wire measuring device for electromagnetic compatibility, which is intended for use in a means of transport, in particular in a ship, and is fed there by a current from a current loop which is based on a current standard IEC-1000-4-5, in particular the standard IEC — 1000—5: 1995, certified source circuit powered by a primary vehicle electrical system of the means of transport and serving the supply of a secondary vehicle electrical system, in which method - a hybrid generator, especially according to the standard IEC-60 -1 or IEC 469-1, used to generate a current / voltage surge,
- the decoupling network complies with the test regulations of the
- a similar type of two-wire measuring device is issued with a 10 operating permit for operation on the secondary on-board electrical system if the tested two-wire measuring device has withstood the test.
- a third variant of the invention consists in a test arrangement for testing a two-wire measuring device for electromagnetic compatibility, which is intended for operation in a means of transport, in particular in a ship, and is fed there by a current from a current loop which comes from a source circuit certified according to a valid standard IEC-1000-4-5, in particular the standard IEC-1000-4-5: 1995, fed by a primary on-board network of the means of transport and serving the supply of a secondary on-board network
- test arrangement includes: a hybrid generator, in particular according to the IEC-60-1 or IEC 469-1 standard, for generating a current / voltage surge, - a decoupling network downstream of the hybrid generator to simulate the source circuit and - a decoupling network downstream of the decoupling network, according to the test regulations of the applicable standards IEC-1000-4-5 non-certified two-wire measuring device.
- a fourth variant of the invention consists in a method for granting an operating license for a two-wire measuring device which is intended for operation in a means of transport, in particular in a ship, and is fed there by a current from a current loop which comes from a source circuit certified according to a valid standard IEC-1000-4-5, in particular the standard IEC-1000-4-5: 1995, which is fed by a primary on-board electrical system of the means of transport and serves to supply a secondary on-board electrical system Which procedure is used to grant the operating permit to the two-wire measuring device only if, without being certified according to the test regulations of the applicable standard IEC-1000-4-5 10, it is operated in the means of transport exclusively on its certified source circuit.
- a major advantage of the invention is that in two-wire measuring devices that are to be used in means of transport, especially in ships, no expensive and storage space-requiring components that suppress or filter interference impulses are required, and that an operating license according to IEC standard
- FIG. 2 in which, in the form of a block diagram, an exemplary embodiment of a two-wire measuring device operated in accordance with the invention is shown schematically.
- a common two-wire measuring device MS e.g. with a standard housing Gh, illustrated as a circuit block.
- At least one physical quantity is measured using the two-wire measuring device MS, e.g. the volume or mass flow of a fluid, or further its density, viscosity, pressure, or temperature, or further the pressure difference between two media or, more generally, temperature, pressure, level, pH or gas concentration.
- the invention does not relate to the measuring principle of the two-wire measuring device MS and its electronic circuit, in particular not its evaluation electronics, but rather its measuring principle-independent certification, its circuit block is not explained in more detail and explained.
- the two-wire measuring device MS is intended for use in a means of transport, especially in a ship. There it is fed by a current from a current loop, which is fed by a primary vehicle electrical system NP of the means of transport, which is certified according to a valid standard IEC-1000-4-5, in particular the standard IEC-1000-4-5: 1995 and the source circuit Q serving to supply a secondary electrical system NS.
- the two connections NPl, NP2 are thus connected to supply connections of the source circuit Q, one of which is active
- the source circuit Q one of which is active
- it is shown as a source g of a DC voltage and to which filter components, such as a coil L and a capacitor C, belong, so that a secondary electrical system NS with the connections NS1, N52 ⁇ is produced at their output.
- the current measuring resistor Rm is connected between the connection N52 and the conductor L2, so that the measuring device connection of the resistor Rm can be described as an indirect connection of the secondary electrical system N52 ⁇ .
- the filter components are dimensioned, designed and designed in such a way that the secondary vehicle electrical system NS corresponds to a valid standard IEC-1000-4-5, in particular the standard IEC-1000-4- 5: 1995, and thus according to this standard can be checked and certified.
- the two-wire measuring device MS surprisingly only needs to be designed in such a way that it cannot be EMC-certified for electromagnetic compatibility in accordance with the applicable standard IEC-1000-4-5 5.
- a two-wire measuring device MS intended for operation in a means of transport in particular in a ship, can be granted an operating license as follows, i.e. It can be EMC-certified as follows:
- the two-wire measuring device MS should be fed by a current from a current loop, the current being based on the current IEC — 1000—4—5 standard, especially the IEC standard. 1000-4-5: 1995, certified, dated
- Primary on-board electrical system NP of the means of transport fed and the source circuit Q serving to supply the secondary on-board electrical system NS comes from. This meets the test requirements of the applicable standard IEC-1000-4-5 and is or has already been EMC-certified thereafter, ie has this operating license or the corresponding certificate.
- the operating license for the two-wire measuring device MS i.e. its EMC certificate, is now only issued to it in accordance with the applicable standard IEC-1000-4-5 if it does not comply with the test requirements of the applicable standard IEC-1000—4— 5: 1995 EMC — to be certified in the means of transport only at its EMC — certified secondary—
- the two-wire measuring device MS can e.g. be equipped with an appropriately dimensioned connection device.
- the method according to the invention for testing the two-wire measuring device MS for electromagnetic compatibility which is intended for operation in a means of transport, in particular in a ship, is carried out as follows (here too, the measuring device MS is affected by the current explained of the current loop containing the source circuit Q:
- a hybrid generator in particular according to the IEC-60-1 or 10 IEC 469-1 standard, generates a current / voltage surge, in particular the current / voltage surge defined in this standard with regard to the time profile of the open circuit voltage and the time profile of the short-circuit current .
- the hybrid generator is followed by a decoupling network, also defined in the standard mentioned, for simulating the source circuit Q and the decoupling network, which is followed by the two-wire measuring device MS which does not meet the test requirements of the IEC-1000-4-5: 1995 standard.
- the operating license for operation on the secondary vehicle electrical system NS of the means of transport, in particular of the ship, is given to other two-wire measuring devices of the same type and thus the EMC certification if the tested two-wire measuring device MS has withstood the test.
- a test arrangement according to the invention for testing a two-wire measuring device for electromagnetic compatibility which is intended for operation in a means of transport, in particular in a ship, comprises the hybrid generator already mentioned, in particular according to the IEC-60-1 standard or IEC 469-1, for generating the explained current / voltage surge, the decoupling network downstream of the hybrid generator for simulating the secondary on-board electrical system NS and the downstream of the decoupling network according to
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
- Tests Of Electronic Circuits (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01943257A EP1287511B1 (de) | 2000-05-22 | 2001-04-18 | Schaltungsanordnung und verkehrsmittel beinhaltend ein zwei-leiter-messgerät sowie verfahren zu dessen prüfung |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00110818 | 2000-05-22 | ||
EP00110818A EP1158476A1 (de) | 2000-05-22 | 2000-05-22 | Zwei-Leiter-Messgerät, Verfahren zu dessen Prüfung und Prüfanordnung dafür |
PCT/EP2001/004386 WO2001091082A2 (de) | 2000-05-22 | 2001-04-18 | Zwei-leiter-messgerät, verfahren zu dessen prüfung und prüfanordnung dafür |
EP01943257A EP1287511B1 (de) | 2000-05-22 | 2001-04-18 | Schaltungsanordnung und verkehrsmittel beinhaltend ein zwei-leiter-messgerät sowie verfahren zu dessen prüfung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1287511A2 true EP1287511A2 (de) | 2003-03-05 |
EP1287511B1 EP1287511B1 (de) | 2009-08-26 |
Family
ID=8168791
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00110818A Withdrawn EP1158476A1 (de) | 2000-05-22 | 2000-05-22 | Zwei-Leiter-Messgerät, Verfahren zu dessen Prüfung und Prüfanordnung dafür |
EP01943257A Expired - Lifetime EP1287511B1 (de) | 2000-05-22 | 2001-04-18 | Schaltungsanordnung und verkehrsmittel beinhaltend ein zwei-leiter-messgerät sowie verfahren zu dessen prüfung |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00110818A Withdrawn EP1158476A1 (de) | 2000-05-22 | 2000-05-22 | Zwei-Leiter-Messgerät, Verfahren zu dessen Prüfung und Prüfanordnung dafür |
Country Status (7)
Country | Link |
---|---|
US (1) | US6967486B2 (de) |
EP (2) | EP1158476A1 (de) |
KR (1) | KR100673502B1 (de) |
AT (1) | ATE441168T1 (de) |
AU (1) | AU6588001A (de) |
DE (1) | DE50115072D1 (de) |
WO (1) | WO2001091082A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005047894B4 (de) * | 2005-10-06 | 2010-05-12 | Abb Ag | Verfahren zur Prüfung der Betriebsfähigkeit von Messumformern |
KR20130087150A (ko) * | 2012-01-27 | 2013-08-06 | 한국전자통신연구원 | 반도체 칩의 emc 측정용 지그 및 이를 이용한 반도체 칩의 emc 측정 방법 |
US9527395B2 (en) | 2014-05-02 | 2016-12-27 | Fca Us Llc | Access arrangement for the power system of an electric vehicle |
DE102014011717B4 (de) * | 2014-08-06 | 2021-11-18 | Abb Schweiz Ag | Verfahren und Vorrichtung zur eigensicheren, redundanten Stromversorgung von Feldgeräten |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4331912A (en) * | 1980-10-06 | 1982-05-25 | Rosemount Inc. | Circuit for converting a non-live zero current signal to a live zero DC output signal |
US5748008A (en) * | 1995-12-06 | 1998-05-05 | Landreth; Keith W. | Electrical integrity test system for boats |
US5959372A (en) * | 1997-07-21 | 1999-09-28 | Emerson Electric Co. | Power management circuit |
US6265879B1 (en) * | 1999-07-14 | 2001-07-24 | Keith W. Landreth | Electrical integrity test system for boats |
US6559660B1 (en) * | 2001-08-20 | 2003-05-06 | Brunswick Corporation | Method and apparatus for testing an electrical system of a marine vessel |
-
2000
- 2000-05-22 EP EP00110818A patent/EP1158476A1/de not_active Withdrawn
-
2001
- 2001-04-18 WO PCT/EP2001/004386 patent/WO2001091082A2/de active Application Filing
- 2001-04-18 AT AT01943257T patent/ATE441168T1/de not_active IP Right Cessation
- 2001-04-18 EP EP01943257A patent/EP1287511B1/de not_active Expired - Lifetime
- 2001-04-18 AU AU65880/01A patent/AU6588001A/en not_active Abandoned
- 2001-04-18 DE DE50115072T patent/DE50115072D1/de not_active Expired - Lifetime
- 2001-04-18 US US10/276,298 patent/US6967486B2/en not_active Expired - Fee Related
- 2001-04-18 KR KR1020027015712A patent/KR100673502B1/ko not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0191082A2 * |
Also Published As
Publication number | Publication date |
---|---|
ATE441168T1 (de) | 2009-09-15 |
WO2001091082A2 (de) | 2001-11-29 |
KR100673502B1 (ko) | 2007-01-24 |
WO2001091082A3 (de) | 2002-10-10 |
US6967486B2 (en) | 2005-11-22 |
KR20030024677A (ko) | 2003-03-26 |
US20030122537A1 (en) | 2003-07-03 |
AU6588001A (en) | 2001-12-03 |
DE50115072D1 (de) | 2009-10-08 |
EP1158476A1 (de) | 2001-11-28 |
EP1287511B1 (de) | 2009-08-26 |
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