00966260 PDF BRITISH STANDARD BS EN 50212 1997 Connectors for thermoelectric sensors The European Standard EN 50212 1996 has the status of a British Standard ICS 17 200 20 BS EN 50212 1997 This Britis[.]
BRITISH STANDARD Connectors for thermoelectric sensors The European Standard EN 50212:1996 has the status of a British Standard ICS 17.200.20 BS EN 50212:1997 BS EN 50212:1997 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GEL/65, Measurement and control, upon which the following bodies were represented: British Gas plc British Nuclear Fuels plc Electrical Contractors’ Association Electricity Association Energy Industries Council GAMBICA (BEAMA Ltd.) Health and Safety Executive Institution of Gas Engineers Institute of Measurement and Control The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Cable Makers Confederation British Pressure Gauge Manufacturers’ Association Department of Trade and Industry (National Physical Laboratory) Engineering Industries Association Institute of Materials Society of Environmental Engineers Institution of Electrical Engineers This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1997 © BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference GEL/65 Draft for comment 95/209650 DC ISBN 580 27115 Amendments issued since publication Amd No Date Comments BS EN 50212:1997 Contents Committees responsible National foreword © BSI 02-1999 Page Inside front cover ii Foreword Text of EN 50212 List of references Inside back cover i BS EN 50212:1997 National foreword This British Standard has been prepared by Technical Committee GEL/65 and is the English language version of EN 50212 Connectors for thermoelectric sensors, published by the European Committee for Electrotechnical Standardization (CENELEC) Cross-references Publication referred to Corresponding British Standard IEC 584 series BS 4937 International thermocouple reference tables HD 446.3 S1:1993 BS 4937-30:1993 Extension and compensating cables Tolerances and identification system A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to 8, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 02-1999 EUROPEAN STANDARD EN 50212 NORME EUROPÉENNE May 1996 EUROPÄISCHE NORM ICS 17.200.20 Descriptors: Thermoelectric sensor, compensated connectors English version Connectors for thermoelectric sensors Connecteurs pour couples thermoélectriques Steckverbindungen für Thermoelemente This European Standard was approved by CENELEC on 1996-03-05 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1996 Copyright reserved to CENELEC members Ref No EN 50212:1996 E EN 50212:1996 Foreword Contents This European Standard was prepared by BTWG 69-2, Compensated connectors for thermoelectric sensors The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50212 on 1996-03-05 The following dates were fixed: — latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-03-01 — latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1997-03-01 Foreword Object and scope General 2.1 Connector types 2.2 Marking for identification and polarities Electrical characteristics 3.1 Maximum allowable error when a temperature gradient is present 3.2 Contact quality stability test 3.3 Insulation resistance 3.4 Earth connection continuity Dimensional characteristics Physical characteristics 5.1 Housing 5.2 Metal parts (pin, socket contact) connected to the cables to be linked together 5.3 Connections Figure — Test set up for insertion error verification Figure — A type connector with pins Figure — A type connector with pins Figure — B type connector with pins Page 3 3 3 4 4 5 © BSI 02-1999 EN 50212:1996 Object and scope The object of this standard is to determine composition, nature of materials, manufacturing tests and thermoelectric behaviour of connectors for sensors using thermocouples according to HD 446.3S1 The latter standard does not cover such special thermocouples as U, L and W types; nevertheless the user of such special thermocouples may use the connectors described hereafter with some restrictions mentioned in the relevant paragraphs General 2.1 Connector types 2.1.1 Connectors with specified dimensional characteristics They are defined in this standard by their dimensional, physical, electrical and chemical characteristics The types retained in this standard are: — A type: connectors with cylindrical pins and cylindrical sockets; — B type: connectors with flat pins and flat sockets 2.1.2 Other connectors The electrical characteristics are identical to those defined for connectors described in 3.1.1 Withdrawal tests, waterproof and dustproof tests, corrosion tests, tests for resistance to heat, will be stated by the manufacturer as a list of technical characteristics The dimensional, physical and chemical characteristics peculiar to each manufacturer are not specified 2.2 Marking for identification and polarities The connectors shall comprise a permanent colour marking, e.g either indelible superficial or mass colouring, or recessed coloured dots or coloured rings, etc At least the positive polarity shall be indicated by permanent marking Though not compulsory, to avoid confusion with previous markings, or markings in other standards, the thermocouple type may be also additionally indicated Code T J E K S R B N Colour brown black violet green orange orange grey pink Electrical characteristics 3.1 Maximum allowable error when a temperature gradient is present This test is only performed as a type test and is only relevant to a plug and socket assembly The maximum allowable errors with a temperature gradient of 40 K between temperatures u1 and u2 (see Figure 1) are stated in the following table: E J K or N R or S T B ± 1,5 °C ± 1,5 °C ± 1,5 °C ± 0,5 °C ± 0,5 °C not relevant To measure them, the following method shall be used: a) Schematic representation Refer to Figure NOTE u2 – u1 = 40 K ± K (see subclause 4.1) °C # u1 # 100 °C a) Results The measurements shall be made using a millivoltmeter having a metrological quality related to the error to be measured The temperature/millivolt correspondence is stated in the relevant standard1) — The first measurement is made by direct connection by the thermocouple — The second measurement is made through the connector — The insertion error is the difference between the two values noted down, one when directly connected by the thermocouple, and the other when connected through the connector 3.2 Contact quality stability test The error shall remain within the limits stated in subclause 4.1 after 250 plugging in and 250 plugging out of the connector 1) IEC Publication 584 © BSI 02-1999 EN 50212:1996 Figure — Test set up for insertion error verification 3.3 Insulation resistance — It shall be possible to plug any B type plug with pins, into a standardized B type socket with two socket contacts, a faulty insertion leading to a thermoelectric error being prevented Removal of the earth-pin prior to such a plugging in is allowed — It shall be possible to plug into any B type socket with socket contacts, a standardized B type plug with pins, a faulty insertion leading to a thermoelectric error being prevented 3.3.1 The insulation resistance between each pin and the other(s) and between each socket and the other(s) shall be at least 10 MW measured with 100 V d.c., at the maximum temperature of the housing as specified by the manufacturer 3.3.2 The insulation resistance between each positive and negative pin or each positive and negative socket and an aluminium foil wrapping the connector housing shall be at least 10 MW measured with 100 V d.c This test may not apply to the earth pin or to the earth socket Physical characteristics 3.4 Earth connection continuity 5.1 Housing The earth connection continuity shall be maintained after 250 plugging in and 250 plugging out of the connector Maximum temperature: to be specified by the manufacturer with regard to the nature of the used materials (e.g self-hardening, reinforced self-hardening, fibreglass, ) Brinell hardness: to be specified by the manufacturer Dimensional characteristics The dimensional characteristics: — on the one hand of A type connectors with or pins; — on the other hand of B type connectors with pins, are given in the following Figure 2, Figure and Figure As to B type connectors with pins, no dimensional characteristics are presently standardized, but such connectors shall fulfil the following prescriptions NOTE The Brinell hardness shall be sufficient to prevent a faulty insertion which may result in a polarity inversion Connector plug in/plug out effort — pin A type: minimum 10 N — maximum 60 N as well for plugging in as for plugging out — pin A type: minimum 10 N — maximum 70 N as well for plugging in as for plugging out — and pin B type: minimum 10 N — maximum 40 N as well for plugging in as for plugging out © BSI 02-1999 EN 50212:1996 5.2 Metal parts (pin, socket contact) connected to the cables to be linked together The materials of these metal parts are determined with respect to the types of thermocouples in use Thermocouples T J E K S R B N + Materials copper iron nickel-chromium nickel-chromium copper copper copper nickel-chromiumsilicon – copper nickel copper nickel copper nickel nickel alloy copper alloy copper alloy copper nickelsilicon NOTE For U and L type thermocouples, T or J type connectors may be used provided that the maximum temperature of the housing stays below 100 °C 5.3 Connections B type connectors shall be equipped with a device such that the positive and negative cables to be connected are clamped between two metallic flat parts prevented from rotating one with relation to the other Figure — A type connector with pins © BSI 02-1999 EN 50212:1996 NOTE The earthing pin shall be the one represented on top of the drawing farther off from the negative pin provided with a groove Figure — A type connector with pins © BSI 02-1999 EN 50212:1996 Figure — B type connector with pins © BSI 02-1999 blank BS EN 50212:1997 List of references See national foreword © BSI 02-1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI Ð British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest 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