1、BSI Standards PublicationBS ISO 16900-8:2015Respiratory protective devices Methods of test and testequipmentPart 8: Measurement of RPD air flow ratesof assisted filtering RPDBS ISO 16900-8:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16900-8:2015.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 respon
3、sible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 78312 8ICS 13.340.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards P
4、olicy and Strategy Committee on 31 May 2015.Amendments issued since publicationDate Text affectedBS ISO 16900-8:2015 ISO 2015Respiratory protective devices Methods of test and test equipment Part 8: Measurement of RPD air flow rates of assisted filtering RPDAppareils de protection respiratoire Mthod
5、es dessai et quipement dessai Partie 8: Mesurage des dbit dair des APR filtrants ventilation assisteINTERNATIONAL STANDARDISO16900-8First edition2015-05-01Reference numberISO 16900-8:2015(E)BS ISO 16900-8:2015ISO 16900-8:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Pu
6、blished 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 permission. Permi
7、ssion 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 16900-8:2015ISO 16900-8:2015(E)
8、Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Prerequisites 25 General test requirements . 26 Principle 27 Test method . 37.1 General . 37.2 Measurement of flow rate using zero back pressure method 37.2.1 General 37.2.2 Test equipment 37.2.3 Test procedure
9、for RPD with a respiratory interface class T . 37.2.4 Test procedure for RPD with a respiratory interface class L . 47.3 Measurement of the interactive flow rate 68 Test report 10Annex A (normative) Application of uncertainty of measurement .12 ISO 2015 All rights reserved iiiContents PageBS ISO 169
10、00-8:2015ISO 16900-8:2015(E)ForewordISO (the International 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
11、 in a subject for which a technical committee 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 Comm
12、ission (IEC) on all matters of electrotechnical 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 s
13、hould be noted. This document was drafted in accordance 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
14、identifying any or all such patent rights. Details 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 con
15、venience of users and does not constitute an endorsement.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: Forewo
16、rd Supplementary information .The committee responsible 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 t
17、est and test equipment: Part 1: Determination 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/meta
18、bolic simulator/RPD headforms/torso, tools and verification tools Part 6: Mechanical resistance/strength of components and connections Part 7: Practical performance test methods Part 8: Measurement of RPD air flow rates of assisted filtering RPD Part 9: Carbon dioxide content of the inhaled air Part
19、 10: Resistance to ignition, 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 fo
20、r gas concentration, temperature, humidity, work of breathing, breathing resistance, elastance and duration Part 14: Measurement of sound leveliv ISO 2015 All rights reservedBS ISO 16900-8:2015ISO 16900-8:2015(E)IntroductionThis part of ISO 16900 is intended as a supplement to the respiratory protec
21、tive devices (RPD) performance standards. 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, these deviations will be specified in the perfor
22、mance standards. ISO 2015 All rights reserved vBS ISO 16900-8:2015BS ISO 16900-8:2015Respiratory protective devices Methods of test and test equipment Part 8: Measurement of RPD air flow rates of assisted filtering RPD1 ScopeThis part of ISO 16900 specifies the methods for measuring air flow rates d
23、elivered to the wearer by an assisted filtering RPD.2 Normative referencesThe following referenced documents, in whole or in parts, are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenc
24、ed document (including any amendments) applies.ISO 16972, Respiratory protective devices Terms, definitions, graphical symbols and units of measurement3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 16972 and the following apply.NOTE Within the defini
25、tions listed in 3.2 to 3.7, the flow rates are deemed to be volumetric flow rates.3.1assisted filtering RPDfiltering RPD where breathable gas is actively supplied to the wearer by the RPD3.2interactive flow rateflow rate through the filters of an assisted filtering RPD (3.1) resulting from the combi
26、ned action of the assisted filtering RPD and the breathing pattern generated by the breathing machine3.3averaged interactive flow rateinteractive flow rate averaged over 10 consecutive breathing cycles of the breathing machine3.4averaged maximum interactive flow rateaverage of the highest flow rate
27、within each breathing cycle of 10 consecutive breathing cycles of the breathing machine3.5averaged minimum interactive flow rateaverage of the lowest flow rate within each breathing cycle of 10 consecutive breathing cycles of the breathing machine3.6measured maximum flow ratevolumetric flow rate of
28、an assisted filtering RPD (3.1), determined in a laboratory test, when the RPD is in the condition which results in the highest air flow rate, where this condition takes into account the influences of temperatures, settings of RPD, pre-conditionings, use of accessories and othersINTERNATIONAL STANDA
29、RD ISO 16900-8:2015(E) ISO 2015 All rights reserved 1BS ISO 16900-8:2015ISO 16900-8:2015(E)3.7measured minimum flow ratevolumetric flow rate of an assisted filtering RPD (3.1), determined in a laboratory test, when the RPD is in the condition which results in the lowest air flow rate, where this con
30、dition takes into account the influences of temperatures, settings of RPD, pre-conditionings, use of accessories, and others4 PrerequisitesIn order to implement this part of ISO 16900, at least the following parameters need to be specified in the relevant performance standard:a) number of test speci
31、mens;b) operating conditions of the RPD, e.g. possible air flow settings, charging status of batteries, influences from the temperature of operation;c) designated operational temperature range;d) appropriate RPD headform(s) and, if necessary, torso;e) any pre-conditioning.5 General test requirements
32、Unless otherwise specified, the values stated in this International Standard are expressed as nominal 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 conditions for testing shall be
33、 between 16 C and 32 C and (50 30) % RH. Any temperature limits specified shall be subject to an accuracy of 1 C.Where the assessment of the pass/fail criterion depends on a measurement, an uncertainty of measurement as specified in Annex A shall be given.6 PrincipleThe complete RPD is fitted to an
34、appropriate headform and, if necessary, torso and the RPD operated in accordance with the manufacturers instructions for use, unless prescribed otherwise by the performance standard. The air flow supplied by the RPD is measured as the air flow rate.Depending on the prerequisites given it might be re
35、quired to determine the air flow rate at conditions which result in the minimum flow rate or the maximum flow rate of the RPD. Depending on the design of the RPD, these air flow rates may be determined by possible flow settings of the RPD, initialization time, the charging status of the battery, dif
36、ferent filter types, alarm settings, the temperature of the RPD, including the temperature range for use, use of accessories, hose length, supply pressure, and other factors.Where it is necessary to manipulate the RPD in order to achieve, during subsequent tests, a constant flow equivalent to either
37、 the measured maximum or minimum flow, the procedure that has to be adopted will depend on the design of the RPD. Possible ways of achieving such adjustments are substituting the battery by an external variable controlled power supply, artificially increasing the pressure drop of the filters used, o
38、r artificially adjusting the air flow control system of the RPD.2 ISO 2015 All rights reservedBS ISO 16900-8:2015ISO 16900-8:2015(E)All results of measured air flow rates are deemed to be volumetric flow rates and shall be corrected to 20C, 1013 hPa according to Formula (1)QQkPTcormmm=(1)whereQcoris
39、 the corrected air flow;Qmis the measured air flow;k is a constant 0,289 K/hPa, i.e. 293 K divided by 1,013 hPa (20C);Pmis the pressure during measurement in hPa;Tmis the temperature during measurement in K.7 Test method7.1 GeneralThis part of ISO 16900 describes two test methods: measurement of flo
40、w rate using zero back pressure method and measurement of the interactive flow rate.7.2 Measurement of flow rate using zero back pressure method7.2.1 GeneralThis test is suitable for RPD, where the interactive flow rate is constant, e.g. RPD with Respiratory Interface class L (loose fitting).7.2.2 T
41、est equipmentThe test equipment consists of the following: appropriate RPD headform, of the appropriate size; torso, where necessary; blower or suction device with the air flow capacity to blow or draw an appropriate amount of air. The required air flow capacity shall be greater than the maximum air
42、flow supplied by the RPD under test. The capacity usually needs to be above the flow rate which corresponds to the peak flow rate of the designated work rate class of the device. The air flow rate of the blower or suction device shall be controllable; suitable flow meter, calibrated in the range of
43、air flow to be measured; differential pressure sensor, with a precision of better than 5 Pa at 0 Pa; airtight box or lightweight bag of a volume between 10 l and 30 l with necessary airtight connections.7.2.3 Test procedure for RPD with a respiratory interface class TThe respiratory interface shall
44、be fitted to the appropriate headform and, if necessary, a torso. Respiratory interfaces of class T shall be fitted in a leaktight manner to the headform. A sealant might ISO 2015 All rights reserved 3BS ISO 16900-8:2015ISO 16900-8:2015(E)be necessary for this. The differential pressure sensor, the
45、flow meter, and the suction device shall be arranged as shown in Figure 1.The RPD shall be activated. The controllable suction device of the test equipment used to draw air from the mouth opening of the head form shall be switched on and adjusted such that the differential pressure sensor shows a co
46、nstant value of 0 5 Pa, when compared to the ambient pressure. The air flow rate measured by the flow meter is the average interactive flow rate.123457Key1 headform 5 controllable suction device2 respiratory interface class T 6 air flow of the RPD3 differential pressure sensor 7 air flow from contro
47、llable suction device4 air flow meterFigure 1 Typical test arrangement for air flow rate measurement of RPD with Respiratory Interface of class T7.2.4 Test procedure for RPD with a respiratory interface class LThe loose fitting respiratory interface shall be fitted to the appropriate headform and, i
48、f necessary, a torso. The differential pressure sensor, flow meter, the blower, and the box or lightweight bag shall be arranged as shown in Figure 2 or Figure 3. All connections to and from the box or lightweight bag shall be leak tight.For RPD with a Respiratory Interface of class L, Figure 2 show
49、s an appropriate test setup.For RPD where the blower of the RPD is integrated in the Respiratory Interface of class L, Figure 3 shows an appropriate test setup.The RPD shall be activated. The adjustable blower device of the test equipment shall be switched on and adjusted so that the lightweight bag does not inflate, nor deflate. A pressure sensor might be helpful to find the exact adjustment of the blower.If a box is used, the blower device shall be adjusted such that the pressure sensor s
