1、BSI Standards PublicationBS EN 12645:2014Tyre pressure measuringinstruments Devices forinspection of pressure and/orinflation / deflation of tyres formotor vehicles Metrology,requirements and testingBS EN 12645:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of E
2、N 12645:2014. Itsupersedes BS EN 12645:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/605, Pressure gauges and switches.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not
3、purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77218 4ICS 17.100; 43.180; 83.160.10Compliance with a British Standard cannot confer immunity f
4、romlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2014.Amendments issued since publicationDate Text affectedBS EN 12645:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12645 August 2014 ICS 17.100; 43.180;
5、 83.160.10 Supersedes EN 12645:1998English Version Tyre pressure measuring instruments - Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles - Metrology, requirements and testing Instruments de mesure de la pression des pneumatiques - Dispositifs de contrle de
6、 la pression et/ou de gonflage / dgonflage des pneumatiques des vhicules motoriss - Mtrologie, exigences et essais Reifendruckmessgerte - Gerte zum Prfen des Druckes und/oder zum Fllen / Entleeren von Reifen an Kraftfahrzeugen - Messtechnik, Anforderungen und Prfungen This European Standard was appr
7、oved by CEN on 31 August 2013. CEN 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
8、 standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN 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 CEN member into its own language
9、and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hun
10、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CEN
11、ELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12645:2014 EBS EN 12645:2014EN 12645:2014 (E) 2 Contents Page Foreword 4 1 Scope 5 2 Normative references 5 3 Terms and
12、definitions .6 4 Categories 8 5 Metrological requirements . 10 5.1 Maximum permissible errors . 10 5.2 Hysteresis error 10 5.3 Zero 10 5.3.1 Return of the instruments indication to zero 10 5.3.2 Zero setting . 10 5.4 Units . 11 6 Technical requirements . 11 6.1 Construction 11 6.2 Analog indicating
13、tyre pressure measuring instrument . 11 6.2.1 Scale angle 11 6.2.2 Scale interval . 11 6.2.3 Scale spacing 11 6.2.4 Index . 12 6.3 Digital indicating tyre pressure measuring instrument 12 6.3.1 Scale interval . 12 6.3.2 Readability . 12 6.4 Additional constructional requirements 12 6.4.1 Mechanical
14、tyre pressure measuring instruments 12 6.4.2 Electronic tyre pressure measuring instrument 12 6.4.3 Electronic and mechanical tyre pressure measuring instruments . 13 6.4.4 Preset device . 13 6.5 Operating conditions 13 6.5.1 Climatic requirements 13 6.5.2 Mechanical requirements . 14 6.5.3 Electrom
15、agnetic immunity requirements for electronic tyre pressure measuring instruments (with digital display and/or electronic sensor) 15 6.5.4 Software requirements for electronic tyre pressure measuring instruments 16 6.5.5 Mounting position requirements . 17 6.5.6 Kind of pressure indication requiremen
16、t . 17 7 Type approval testing to check for compliance with metrological and technical requirements . 17 7.1 General . 17 7.2 Determination of accuracy error . 18 7.3 Determination of hysteresis error . 18 7.4 Determination of return of instruments indication to zero 18 7.5 Determination of error af
17、ter/during a disturbance or influence . 18 7.6 Climatic tests . 18 7.6.1 Determination of the MPE in the rated temperature in service 18 7.6.2 Rated storage temperature 19 7.6.3 Humidity . 19 BS EN 12645:2014EN 12645:2014 (E) 3 7.6.4 Corrosion test 19 7.7 Mechanical tests 19 7.7.1 Protection against
18、 ingress of water and foreign particles (degree of protection) . 19 7.7.2 Examination of the durability of the measuring instrument . 20 7.7.3 Vibration (random) 20 7.7.4 Free fall . 21 7.8 Electromagnetic immunity 21 7.8.1 AC mains voltage variations 21 7.8.2 DC mains voltage variations 21 7.8.3 AC
19、 mains power 21 7.8.4 Bursts on AC and DC mains. 21 7.8.5 Electrostatic discharges . 21 7.8.6 Fast transients on signal and I/O lines 22 7.8.7 Surges on signal and I/O lines . 22 7.8.8 DC mains power 22 7.8.9 Ripple on DC input power ports 22 7.8.10 Surges on AC and DC mains lines 22 7.8.11 Radiated
20、 radio-frequency electromagnetic fields 22 7.8.12 Conducted radio-frequency fields . 22 7.8.13 Voltage variations (if powered by vehicle battery) 22 7.8.14 Electrical transient conduction along supply lines (if powered by vehicle battery) 23 7.8.15 Load dump (if powered by vehicle battery) 23 7.9 So
21、ftware examination . 25 7.10 Mounting position . 26 7.11 Determination of pressure sensor kind of pressure test 26 8 Inscriptions and marking 26 8.1 Inscriptions 26 8.1.1 Obligatory inscriptions . 26 8.1.2 Optional inscriptions . 27 8.2 Verification marks and sealing 27 9 Metrological control 27 9.1
22、 Type approval 27 9.2 Initial Verification . 27 9.3 Subsequent verification 27 9.4 In-service control . 28 Annex A (normative) Correspondence between requirements and tests . 29 Annex B (normative) MPE graphics 30 Annex C (informative) Examples of type approval test sequence for multiple samples . 3
23、2 Annex D (informative) Recommended solutions for special test conditions . 35 Bibliography 36 BS EN 12645:2014EN 12645:2014 (E) 4 Foreword This document (EN 12645:2014) has been prepared by Technical Committee CEN/TC 301 “Road vehicles”, the secretariat of which is held by AFNOR. This European Stan
24、dard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2015, and conflicting national standards shall be withdrawn at the latest by February 2015. Attention is drawn to the possibility that some of the elements o
25、f this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12645:1998, and additionally to the tyre pressure mechanical measuring instruments, introduces new clauses for the electron
26、ic devices (requirements, test methods) and for the metrological control (during type approval, initial and subsequent verification, and in-service control). This document has been prepared under a mandate (M/457) given to CEN by the European Commission and the European Free Trade Association. Accor
27、ding to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
28、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12645:2014EN 12645:2014 (E) 5 1 Scope This European Standard defines metrological and
29、technical requirements and tests of tyre pressure measuring instruments. Tyre pressure measuring instruments (often referred to as Tyre Pressure Gauges, TPG) are for the inspection of pressure and/or inspection of inflation/deflation of tyres of motor vehicles. It establishes in the context of motor
30、 vehicles tyres, the minimum characteristics of the chain of measurement of tyre pressure measuring instruments intended to inspect or adjust the pressure of tyres inflated by air or nitrogen. These devices, classified in different categories, are hereinafter referred to by generic term, “tyre press
31、ure measuring instruments”. This chain of measurement consists of all the elements between the tyre valve and the display device (connector, hose, control device, measurement components, reservoir, preset device etc.). They indicate the pressure difference (pe) between the air or the nitrogen in the
32、 tyre and the atmosphere. The field of application established above can be extended to other applications where no specific standard exists. Because of the influence of tyre pressure on road safety and energy efficiency, periodical verification of tyre pressure measuring instruments is strongly rec
33、ommended. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including
34、 any amendments) applies. EN 837-1, Pressure gauges - Part 1: Bourdon tube pressure gauges - Dimensions, metrology, requirements and testing EN 837-3, Pressure gauges - Part 3: Diaphragm and capsule pressure gauges - Dimensions, metrology, requirements and testing EN 60068-2-1, Environmental testing
35、 - Part 2-1: Tests - Test A: Cold EN 60068-2-2, Environmental testing - Part 2-2: Tests - Test B: Dry heat EN 60068-2-11, Environmental testing - Part 2: Tests - Test Ka: Salt mist EN 60068-2-30, Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle) EN 60068-2-32,
36、 Basic environmental testing procedures Part 2: Tests Test Ed: Free fall (IEC 60068-2-32) EN 60068-2-47, Environmental testing - Part 2-47: Tests - Mounting of specimens for vibration, impact and similar dynamic tests EN 60068-2-64, Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broa
37、dband random and guidance BS EN 12645:2014EN 12645:2014 (E) 6 EN 60068-3-8, Environmental testing - Part 3-8: Supporting documentation and guidance - Selecting amongst vibration tests EN 60529, Degrees of protection provided by enclosures (IP Code) EN 60654-2, Operating conditions for industrial-pro
38、cess measurement and control equipment - Part 2: Power EN 61000-4-1, Electromagnetic compatibility (EMC) - Part 4-1: Testing and measurement techniques - Overview of IEC 61000-4 series EN 61000-4-2, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic di
39、scharge immunity test EN 61000-4-3, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test EN 61000-4-4, Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques Electrical fast trans
40、ient/burst immunity test (IEC 61000-4-4) EN 61000-4-5, Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement techniques - Surge immunity test EN 61000-4-6, Electromagnetic compatibility (EMC) Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced b
41、y radio-frequency fields (IEC 61000-4-6) EN 61000-4-11, Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests EN 61000-4-17, Electromagnetic compatibility (EMC) - Part 4-17: Testing and measuremen
42、t techniques - Ripple on d.c. input power port immunity test EN 61000-4-29, Electromagnetic compatibility (EMC) - Part 4-29: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests ISO 7637-2, Road vehicles Electrical dist
43、urbances from conduction and coupling Part 2: Electrical transient conduction along supply lines only ISO 16750-1, Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 1: General ISO 16750-2, Road vehicles Environmental conditions and testing for electrical
44、 and electronic equipment Part 2: Electrical loads 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 air gases used to inflate tyres of vehicles EXAMPLE Air or nitrogen. BS EN 12645:2014EN 12645:2014 (E) 7 3.2 tyre pressure measuring instrument
45、 instrument measuring the tyre pressure comprising all the elements from the tyre valve connector up to and including the display device Note 1 to entry: Often referred to as TPG (Tyre Pressure Gauge). Note 2 to entry: The elements may include tyre valve connector, hose, control device, measurement
46、components, display device, software, reservoir, etc. 3.3 gauge pressure (pe) pressure difference between an absolute pressure and the absolute pressure of the atmosphere Note 1 to entry: The tyre pressure is the pressure difference between the air in the tyre and the atmosphere and therefore a gaug
47、e pressure 3.4 category subdivision of possible configurations of the measuring instrument Note 1 to entry: For the purpose of selecting the correct test method, the parts in the measuring chain are defined to be fixed, portable or hand-held. The control device is not relevant in defining the catego
48、ry. 3.5 preset device device which permits the selection of the (target) pressure and which automatically stops inflation/deflation process when the target pressure is reached 3.6 electronic tyre pressure measuring instrument tyre pressure measuring instrument with one or more electronic parts in th
49、e chain of measurement 3.7 mechanical tyre pressure measuring instrument tyre pressure measuring instrument without electronic parts in the chain of measurement 3.8 index means to indicate the tyre pressure value (for example: a pointer with scale or a cursor with scale) 3.9 indication display of the tyre pressure value Note 1 to entry: For example a digital display or an index with scale. Note 2 to entry: Normally a scale is arc shaped. Note 3 to entry: The display may be an index with scale on a screen. 3.10 MPE acronym often used for “M
