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
