1、BSI Standards PublicationBS ISO 16900-9:2015Respiratory protective devices Methods of test and testequipmentPart 9: Determination of carbon dioxidecontent of the inhaled gasBS ISO 16900-9:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16900-9:2015.The UK
2、participation in its preparation was entrusted to TechnicalCommittee PH/4, Respiratory protection.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are respons
3、ible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 80713 8ICS 13.340.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Po
4、licy and Strategy Committee on 31 October 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 16900-9:2015 ISO 2015Respiratory protective devices Methods of test and test equipment Part 9: Determination of carbon dioxide content of the inhaled gasAppareils de protec
5、tion respiratoire Mthodes dessai et quipement dessai Partie 9: Dosage de la teneur en dioxyde de carbone du gaz inhalINTERNATIONAL STANDARDISO16900-9First edition2015-10-01Reference numberISO 16900-9:2015(E)BS ISO 16900-9:2015ISO 16900-9:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCU
6、MENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written
7、permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 16900-9:2015IS
8、O 16900-9:2015(E)Foreword vIntroduction vii1 Scope . 12 Normative references 13 Terms and definitions . 14 Prerequisites 15 General test requirements . 16 Principle 27 Apparatus . 27.1 General . 27.2 Test method 1 . 37.2.1 Breathing machine . 37.2.2 Carbon dioxide analyser 37.2.3 Carbon dioxide samp
9、ling 37.2.4 RPD head form/torso . 47.3 Test method 2 . 47.3.1 Breathing machine and ancillary equipment 47.3.2 RPD carbon dioxide analyser 67.3.3 RPD head form/torso . 67.3.4 Test gas . 67.3.5 Exhalation and inhalation reservoirs . 67.4 Test method 3 . 67.4.1 Breathing machine . 67.4.2 Carbon dioxid
10、e analyser 77.4.3 RPD Head form/torso 77.4.4 Carbon dioxide and volume signal synchronisation . 77.4.5 Data acquisition 78 Test procedures . 88.1 General . 88.1.1 Test sequences . 88.1.2 Testing RPD with respiratory interface type L . 88.2 Test method 1 Method for measurement of carbon dioxide in in
11、halation gas . 88.2.1 Calculation of breathing machine settings 88.2.2 Operation of breathing machine 88.2.3 Auxiliary fan . 98.2.4 Exhaled carbon dioxide concentration . 98.2.5 RPD carbon dioxide level 98.2.6 Fitting the RPD. 98.2.7 Adjusting baseline carbon dioxide concentration when testing suppl
12、ied breathable gas RPD 98.2.8 Calculation of carbon dioxide increase . 98.2.9 Completion of test sequences . 98.3 Test method 2 Method for measurement of carbon dioxide in inhalation gas 108.3.1 Exhaled Carbon dioxide concentration .108.3.2 Exhalation reservoir 108.3.3 Inhalation reservoir .108.3.4
13、Operation of breathing machine . 108.3.5 Auxiliary fan 108.3.6 Inhaled carbon dioxide concentration .108.3.7 End of each test sequence . 108.3.8 Fitting the RPD10 ISO 2015 All rights reserved iiiContents PageBS ISO 16900-9:2015ISO 16900-9:2015(E)8.3.9 Calculation of carbon dioxide increase 108.3.10
14、Adjusting baseline carbon dioxide concentration when testing supplied breathable gas RPD .108.3.11 Completion of test sequences 118.4 Test method 3 Method for measurement of carbon dioxide in inhalation gas 118.4.1 Operation of breathing machine . 118.4.2 Auxiliary fan 118.4.3 Setting of initial car
15、bon dioxide flow rate .118.4.4 Data recording 118.4.5 Calculation of inspired carbon dioxide 118.4.6 Fitting the RPD128.4.7 Calculation of carbon dioxide increase 128.4.8 Adjusting baseline carbon dioxide concentration when testing supplied breathable gas RPD .128.4.9 Completion of test sequence . 1
16、29 Test report 12Annex A (normative) Application of uncertainty of measurement .14Annex B (informative) Profile of carbon dioxide concentration in the exhaled gas and use of verification volumes 16Bibliography .18iv ISO 2015 All rights reservedBS ISO 16900-9:2015ISO 16900-9:2015(E)ForewordISO (the I
17、nternational Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee
18、has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnica
19、l standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in a
20、ccordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Det
21、ails of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an e
22、ndorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee re
23、sponsible for this document is ISO/TC 94, Personal safety Protective clothing and equipment, Subcommittee SC 15, Respiratory protective devices.ISO 16900 consists of the following parts, under the general title Respiratory protective devices Methods of test and test equipment: Part 1: Determination
24、of inward leakage Part 2: Determination of breathing resistance Part 3: Determination of particle filter penetration Part 4: Determination of gas filter capacity and migration, desorption and carbon monoxide dynamic testing Part 5: Breathing machine, metabolic simulator, RPD headforms and torso, too
25、ls and verification tools Part 6: Mechanical resistance/strength of components and connections Part 7: Practical performance tests methods Part 8: Measurement of RPD air flow rates of assisted filtering RPD Part 9: Determination of carbon dioxide content of the inhaled air Part 10: Resistance to ign
26、ition, flame, radiant heat and heat Part 11: Determination of field of vision Part 12: Determination of volume-averaged work of breathing and peak respiratory pressures Part 13: RPD using regenerated breathable gas and special application mining escape RPD: Consolidated test for gas concentration, t
27、emperature, humidity, work of breathing, breathing resistance, elastance and duration ISO 2015 All rights reserved vBS ISO 16900-9:2015ISO 16900-9:2015(E) Part 14: Measurement of sound levelvi ISO 2015 All rights reservedBS ISO 16900-9:2015ISO 16900-9:2015(E)IntroductionThis part of ISO 16900 is int
28、ended as a supplement to the respiratory protective devices (RPD) performance standard. Test methods are specified for complete devices or parts of devices that are intended to comply with the performance standards. If deviations from the test method given in this part of ISO 16900 are necessary, th
29、ese deviations will be specified in the performance standards.The following definitions apply in understanding how to implement an ISO International Standard and other normative ISO deliverables (TS, PAS, IWA): “shall” indicates a requirement; “should” indicates a recommendation; “may” is used to in
30、dicate that something is permitted; “can” is used to indicate that something is possible, for example, that an organization or individual is able to do something.3.3.1 of the ISO/IEC Directives, Part 2 (sixth edition, 2011) defines a requirement as an “expression in the content of a document conveyi
31、ng criteria to be fulfilled if compliance with the document is to be claimed and from which no deviation is permitted.”3.3.2 of the ISO/IEC Directives, Part 2 (sixth edition, 2011) defines a recommendation as an “expression in the content of a document conveying that among several possibilities one
32、is recommended as particularly suitable, without mentioning or excluding others, or that a certain course of action is preferred but not necessarily required, or that (in the negative form) a certain possibility or course of action is deprecated but not prohibited.” ISO 2015 All rights reserved viiB
33、S ISO 16900-9:2015BS ISO 16900-9:2015Respiratory protective devices Methods of test and test equipment Part 9: Determination of carbon dioxide content of the inhaled gas1 ScopeThis part of ISO 16900 specifies the test methods for determining the increased carbon dioxide content of the inhaled gas ca
34、used by wearing the RPD.Closed circuit supplied breathable gas RPD are excluded from this part of ISO 16900.NOTE See test method in ISO 16900-13.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application.
35、For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 16972, Respiratory protective devices Terms, definitions, graphical symbols and units of measurement3 Terms and definitionsFor the purpos
36、es of this document, the terms and definitions given in ISO 16972 apply.4 PrerequisitesThe performance standards shall indicate the conditions of the test. This includes the following:a) the number of test specimens;b) operating conditions of the RPD;c) types of RPD head form;d) any prior conditioni
37、ng or testing;e) breathing minute volumes (frequency and tidal volume);f) carbon dioxide exhalation concentrations (average and peak);g) any deviations from the test method(s).5 General test requirementsUnless otherwise specified, the values stated in this part of ISO 16900 are expressed as nominal
38、values. Except for temperature limits, values which are not stated as maxima or minima shall be subject to a tolerance of 5 %. Unless otherwise specified, the ambient temperature for testing shall be between 16 C and 32 C and (50 30) % RH. Any temperature limits specified shall be subject to an accu
39、racy of 1 C.INTERNATIONAL STANDARD ISO 16900-9:2015(E) ISO 2015 All rights reserved 1BS ISO 16900-9:2015ISO 16900-9:2015(E)Where the assessment of the pass/fail criterion depends on a measurement, an uncertainty of measurement as specified in Annex A shall be reported.6 PrincipleThe respiratory inte
40、rface is fitted to a RPD head form/torso. Any air or breathable gas supply is operated in the manufacturers minimum condition, unless prescribed otherwise in the performance standards. Breathing gas containing a defined concentration of carbon dioxide is supplied at a specified rate from a breathing
41、 machine to the RPD head form/torso. The inhaled gas is analysed for carbon dioxide concentration. The test is also conducted without the RPD fitted to the RPD head form to determine the baseline carbon dioxide concentration for the test apparatus. This value is then subtracted from the value determ
42、ined when the RPD is fitted, to determine the increase in inhaled carbon dioxide concentration caused by the RPD.7 Apparatus7.1 GeneralDetails of the RPD head forms, airway openings, and sampling ports shall be given.The breathing machine shall exhale carbon dioxide with peak and average carbon diox
43、ide concentrations as defined by the performance standards. This ensures that the dead space of the respiratory interface is flushed with carbon dioxide rich gas in the same way as would occur when the RPD is worn by a person.The inhaled gas shall be analysed for carbon dioxide content. The results
44、can be presented as average inhaled carbon dioxide concentration and/or equivalent dead space.Three alternative test methods are specified in 7.2, 7.3, and 7.4 and shown in Figures 1, 2, and 3. They employ different practical ways of exhaling carbon dioxide enriched gas and different ways to determi
45、ne the inhaled carbon dioxide concentration. All three methods have been shown to be suitable for the determination of the carbon dioxide concentration of the inhaled breathable gas. Combinations of these methods or other methods may be used if shown to be equivalent, but shall use an appropriate RP
46、D head form/torso.The accuracy of the inhaled carbon dioxide concentration measurement is determined using the verification volumes (working standards) which are either (250 50) ml or (500 50) ml.The carbon dioxide exhalation concentration shall be adjustable to be within the limits given in the per
47、formance standards.In order to ensure that the RPD inhales laboratory air containing a minimum concentration of carbon dioxide, an auxiliary fan (not shown in Figures 1 to 3) is arranged so that it blows the exhaled air emerging from the RPD away from the RPD inlet.NOTE The auxiliary fan method is n
48、ot required when carrying out tests on devices which have their own independent breathable gas supply (e.g. compressed airline devices).Good laboratory ventilation is required to maintain the ambient laboratory carbon dioxide concentration below 0,1 % during testing.For RPD with an independent breat
49、hable gas supply, the carbon dioxide concentration in the supply shall be less than 0,1 %.2 ISO 2015 All rights reservedBS ISO 16900-9:2015ISO 16900-9:2015(E)7.2 Test method 17.2.1 Breathing machineA single cylinder breathing machine meeting shall be used. In order to avoid errors in the measurement of carbon dioxide in the inhaled gas, it is important that the solenoid valves (see Figure 1) make a good seal on closing and are actuated at precisely the same time. In order to avoid upsetting the pressur
