BS EN 13274-6-2002 Respiratory protective devices - Methods of test - Determination of carbon dioxide content of the inhalation air《呼吸保护装置 试验方法 吸入空气中二氧化碳含量的测定》.pdf

1、BRITISH STANDARD BS EN 13274-6:2002 Respiratory protective devices Methods of test Part 6: Determination of carbon dioxide content of the inhalation air The European Standard EN 13274-6:2001 has the status of a British Standard ICS 13.340.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY C

2、OPYRIGHT LAWBS EN 13274-6:2002 This British Standard, having been prepared under the direction of the Health and Environment Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 26 February 2002 BSI 26 February 2002 ISBN 0 580 3919

3、5 7 National foreword This British Standard is the official English language version of EN 13274-6:2001. The UK participation in its preparation was entrusted by Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/9, Test methods and interpretation, which has the responsibility to

4、: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “I

5、nternational Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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 wit

6、h a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Euro

7、pean developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since pu

8、blication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN132746 December2001 ICS13.340.30 Englishversion RespiratoryprotectivedevicesMethodsoftestPart6: Determinationofcarbondioxidecontentoftheinhalationair AppareilsdeprotectionrespiratoireMthodesdessai Partie6:Dterminationde

9、lateneurendioxydedecarbone delairinhal AtemschutzgertePrfverfahrenTeil6:Bestimmungdes KohlenstoffdioxidGehaltesderEinatemluft ThisEuropeanStandardwasapprovedbyCENon16November2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standar

10、dthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra ns

11、lation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portug

12、al,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN132746:2001EE

13、N132746:2001(E) 2 Contents page Foreword3 Introduction .4 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Prerequisites 4 5 Testmethod. .5 5.1 Principle5 5.2 Testequipment 5 5.2.1 General5 5.2.2 Breathingmachine. 5 5.2.3 Carbondioxidesamplingarrangement . 5 5.2.4 Sheffieldhead/torso 5

14、5.2.5 Auxiliaryfan. .6 5.2.6 Carbondioxidesamplingofambientair .6 5.3 Procedureformeasurementofcarbondioxideininhalationair6 AnnexA (normative) Fittingprocedureforhoods(withorwithoutheadharness)whichsealaround theneck. 10 A.1 Introduction 10 A.2 Principle10 A.3 Apparatus .10 A.3.1 Sheffielddummyhead

15、/torso .10 A.3.2 Standandelasticstring 10 A.3.3 Adjustablecollar . .10 A.4 Procedure .11 AnnexB (informative) TestresultsUncertaintyofmeasurement 14 AnnexZA (informative) ClausesofthisEuropeanStandardaddressingessentialrequirementsorother provisionsofEUDirectives. . 15EN132746:2001(E) 3 Foreword Thi

16、sEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC79“Respiratoryprotectivedevices“, thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJune2002,andconflictingnationalstandardsshallbe

17、withdrawnatthelatestby June2002. ThisEuropeanStandardhasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandthe EuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisstandard. Thisiso

18、neofseveralparts,whichareasfollows: Part1:Determinationofinwardleakageandtotalinwardleakage Part2:Practicalperformancetests Part3:Determinationofbreathingresistance Part4:Flametests Part5:Climaticconditions Part6:Determinationofcarbondioxidecontentoftheinhalationair Part7:Determinationofparticlefilt

19、erpenetration Part8:Determinationofdolomitedustclogging AnnexAisnormative.AnnexBisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,G

20、reece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden, SwitzerlandandtheUnitedKingdom.EN132746:2001(E) 4 Introduction Thisstandardisintendedasasupplementtothespecificdevicestandardsforrespiratoryprotectivedevices.Test methodsarespecifiedforcompleteorpartsofdevices.Ifdeviati

21、onsfromthetestmethodgiveninthisstandardare necessary,thesedeviationswillbespecifiedintherelevantdevicestandard. 1Scope ThisEuropeanStandardspecifiesthetestprocedureformeasuringthecarbondioxidecontentintheinhaledair (deadspace)ofrespiratoryprotectivedevices. 2 Normativereferences ThisEuropeanStandard

22、incorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedini

23、tbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN132, RespiratoryprotectivedevicesDefinitionsoftermsandpictograms. 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN132apply,togetherwiththe f

24、ollowing: 3.1 ambientconditions atmospherewherethetemperatureis16Cto32Candtherelativehumidityis20%to80% 3.2 dryatmosphere atmospherewheretherelativehumidityislessthan20% 3.3 wetatmosphere atmospherewheretherelativehumidityisgreaterthanorequalto95% 4Prerequisites InordertoimplementthispartofEN13274,a

25、tleastthefollowingparametersneedtobespecifiedinthe appropriatedevicestandard: numberofsamples; numberofrepeattestspersample; samplepreconditioning; size(s) of facepiece; useofdummyheadorhead/torso; methodofsealingfacepiecetodummyhead/torso(ifappropriate);EN132746:2001(E) 5 completeequipmentorfacepie

26、ceonly; deviceairsupplyonoroff; directionofanysupplementaryairflow; pass/fail criteria; anydeviationsfromtestmethod. 5 Testmethod 5.1Principle Thedeviceisfitted,asdescribedbythedevicestandard,toaSheffielddummyhead/torsoand,inthecaseof completeequipmenttests,anyairsupplyisoperatedinthemanufacturersmi

27、nimumconditionunlessprescribed otherwisebythatstandard.Breathingaircontainingadefinedconcentrationofcarbondioxideissuppliedata specifiedratefromabreathingmachinetoadummyhead/torso.Theinhaledairisanalysedforcarbondioxide content. Thecarbondioxidelevelmeasuredgivesanassessmentofthe“deadspace“oftheface

28、pieceratherthana“real life“measurementofthelevelofcarbondioxideintheinhaledair. 5.2 Testequipment 5.2.1General AtypicaltestarrangementusingasinglecylinderbreathingmachineisshowninFigure1. Thetotaldeadspaceofthegaspathofthetestinstallation,excludingthevolumeofthebreathingmachine,shall notexceed2000ml

29、. Thetestshallbecarriedoutatambientconditions. 5.2.2 Breathingmachine Abreathingmachineandassociatedequipmentwithsolenoidvalvescontrolledbythebreathingmachine.Inorder toavoiderrorsinthemeasurementofcarbondioxideintheinhaledair,itisimportantthatthesolenoidvalvesmake agoodsealonclosingandthatthetiming

30、oftheiractionallowsnooverlaptooccur. 5.2.3 Carbondioxidesamplingarrangement Asampleoftheinhaledairistakenbyanauxiliarylungdrivenbythebreathingmachineandinphasewithit.Itis settoinhaleaknownsamplevolume(achosenpercentageoftheinhalationvolumeofthebreathingmachine) duringtheinhalationstrokeofthebreathin

31、gmachine.Thisapparent“loss“ininhalationvolumeofthebreathing machineiscompensatedforbythevolumeofcarbondioxidefedviatheflowmeterintothebreathingmachineon itsinhalationstroke.Itisthereforeimportantthatthesetwovolumesareequal. Theexhaledairiscontinuouslymonitoredforcarbondioxidecontentataflowdetermined

32、bytheanalyser.The samplepointisimmediatelybeforethesolenoidvalveintheexhalationcircuit.Tomaintainequilibriumthesample isreturnedtothecircuitupstreamofthesamplepoint. Thecarbondioxideabsorberisnecessarytopreventbuildupofcarbondioxideinthetestequipmentcircuit.The compensatorsallowconstantconditionstob

33、emaintainedforparticularpartsofthetestcircuit. 5.2.4 Sheffieldhead/torso Sheffieldheadfittedwithconcentrictubesandcentralcarbondioxidesamplingtube,showninFigure2.Wherea torsoisfitted,thetubesaredirecteddownthenecksectiontoexitfromthetorsoataconvenientpointasshownin FigureA.2.Theextravolumeofthisarra

34、ngementshouldbeborneinmind(see5.2.1).EN132746:2001(E) 6 Theendoftheconcentrictubesislevelwiththetop“lip“ofthedummyheadandtheendofthesampletubeislevel withtheendoftheconcentrictubes. ThearrangementforsettingupandtestinghoodeddeviceswhichsealaroundtheneckisgiveninannexA. 5.2.5Auxiliary fan Inordertoen

35、surethatthedeviceinhaleslaboratoryaircontainingaminimumlevelofcarbondioxide,anauxiliary fanisarrangedsothatitblowstheexhaledairemergingfromthedeviceawayfromthedeviceinlet.Thefanis arrangedtodeliverairat0,5m/swhenmeasuredatapoint50mminfrontofthedeviceinlet. NOTE Theauxiliaryfanarrangementisnotrequire

36、dwhencarryingouttestsondeviceswhichhavetheirownindependent airsupply(pressedairlinedevices). 5.2.6 Carbondioxidesamplingofambientair Itisnecessarytoassessthelevelofcarbondioxideinthelaboratoryairintheimmediatevicinityofthedeviceinlet. Thisisachievedbyusingasampleprobeplacedatapoint50mminfrontofthede

37、viceinlet.Theprobeis connectedtotheauxiliarylungusedformeasuringdeadspace.Itsamplesduringtheinhalationphaseofthe breathingmachineatthesamesamplerateasusedtomeasurethecarbondioxideintheinhalationair. 5.3 Procedureformeasurementofcarbondioxideininhalationair 5.3.1 Confirmwhetherthedevicestandardrequir

38、esbreathingmachinesettingsandexhaledcarbondioxide levelswhichleadtosamplevolumesdifferenttothosespecifiedinthefollowingprocedure.Anexampleofthe calculationnecessaryfordifferentrequirementsisgivenin5.3.10. 5.3.2 FitthefacepieceorcompleteequipmentasdirectedbythedevicestandardtotheSheffieldhead/torsoas

39、 appropriate,andoperatethedeviceinitsminimumdesignconditiondefinedinthedevicestandard.Ensureasfar aspossiblethatexhaledairfromthedevice(whichduringsubsequenttestingwillcontain5%carbondioxide)is notrebreathedbythedevice. 5.3.3 ConnectthebreathingcircuittotheSheffielddummyhead/torso. 5.3.4 Switchonthe

40、breathingmachine(andwithittheauxiliarylungandvalves)andoperateat25cyclesper minute and2,0l/stroke. 5.3.5 Switchontheauxiliaryfan(ifappropriate)andadjusttheairvelocityto0,5m/satapoint50mminfrontof thedeviceinlet(s),ensuringthattheairisdirectedawayfromthedeviceinlet(s). 5.3.6 Adjustthecarbondioxidesup

41、plyintothebreathingmachineto2,5l/min(i.e.acarbondioxide concentrationequivalentto5%ofthevolumeoftheexhalationstrokeofthebreathingmachine)viaacontrolvalve (iffitted),theflowmeter,compensatingbagandnonreturnvalves.Checkthecarbondioxideconcentrationinthe exhaledaironadrybasisandadjustasnecessarytoachie

42、veastabilisedlevelof5%. 5.3.7 Drawoffasampleoftheinhaledairduringtheinhalationphasebytheauxiliarylungsetatarateof100ml displacement/stroke(i.e.5%ofthevolumeoftheinhalationstrokeofthebreathingmachine). Measurethecarbondioxideconcentrationinthesamplebymeansoftheanalyser.Continuethetestuntilasteady val

43、ueisobtained.Recordthisvalueastheuncorrectedlevelofcarbondioxideintheinhaledair. 5.3.8 Continuethetestandmeasuretheambientcarbondioxidelevel50mminfrontoftheinlet(s)tothedevice. Takethemeasureonceastabilisedlevelforcarbondioxideintheinhalationairhasbeenattained.Thereference levelshallbelessthan0,1%.Fordeviceswithanindependentairsupply,thecarbondioxidelevelinthesupplyair shallbelessthan0,1%. 5.3.9 Subtracteitherthelaboratoryambientcarbondioxidelevelorthatintheindependentairsupply,as appropriate,fromthemeasu