EN ISO 6145-4-2008 en Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 4 Continuous syringe injection method《气体分析 动态容量法制备校准气体混合物 第4部分 .pdf
《EN ISO 6145-4-2008 en Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 4 Continuous syringe injection method《气体分析 动态容量法制备校准气体混合物 第4部分 .pdf》由会员分享,可在线阅读,更多相关《EN ISO 6145-4-2008 en Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 4 Continuous syringe injection method《气体分析 动态容量法制备校准气体混合物 第4部分 .pdf(24页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 4: Continuous syringe injection method ICS 71.040.40 BS EN ISO 6145-4:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 23 March 200
2、5 ISBN 978 0 580 60359 4 National foreword This British Standard is the UK implementation of EN ISO 6145-4:2008. It is identical with ISO 6145-4:2004. It supersedes BS ISO 6145-4:2004 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PTI/15, Natural gas
3、 and gas analysis. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot
4、confer immunity from legal obligations. Amendments/corrigenda issued since publication Date Comments This corrigendum renumbers BS ISO 6145-4:2004 as BS EN ISO 6145-4:2008 BS EN ISO 6145-4:2008 28 February 2009 BSI 2009EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6145-4 August 2008 ICS 7
5、1.040.40 English Version Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 4: Continuous syringe injection method (ISO 6145-4:2004) Analyse des gaz - Prparation des mlanges de gaz pour talonnage laide de mthodes volumtriques dynamiques - Partie 4: Mthode
6、continue par seringue dinjection (ISO 6145-4:2004) Gasanalyse - Herstellung von Kalibriergasgemischen mit Hilfe von dynamisch-volumetrischen Verfahren - Teil 4: Kontinuierliches Spritzen-Injektionsverfahren (ISO 6145- 4:2004) This European Standard was approved by CEN on 30 July 2008. CEN members ar
7、e 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 standards may be obtained on application to
8、the CEN 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 and notified to the CEN Management Centre has the sam
9、e status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, R
10、omania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means rese
11、rved worldwide for CEN national Members. Ref. No. EN ISO 6145-4:2008: EForeword The text of ISO 6145-4:2004 has been prepared by Technical Committee ISO/TC 158 “Analysis of gases” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 6145-4:2008 by Technical C
12、ommittee CEN/SS N21 “Gaseous fuels and combustible gas” the secretariat of which is held by CMC. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2009, and conflicting national standards s
13、hall be withdrawn at the latest by February 2009. Attention is drawn to the possibility that some of the elements of 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. According to the CEN/CENELEC Interna
14、l Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta
15、, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 6145-4:2004 has been approved by CEN as a EN ISO 6145-4:2008 without any modification. BSENISO6145-4:2008 iii Contents Page 1 Scope 1 2 Normativ
16、e references 1 3 Principle 1 4 Application to preparation of gas mixtures 2 4.1 Description of the experimental procedure 2 4.2 Area of validity . 3 4.3 Operating conditions 4 5 Expression of results 4 5.1 Volume fraction 4 5.2 Sources of uncertainty . 4 5.3 Uncertainty of volume fraction 5 Annex A
17、(informative) Pre-mixed gases for preparation of mixtures of high dilution . 6 Annex B (informative) Example of apparatus for preparation of calibration gas mixtures . 7 Annex C (informative) Practical hints . 9 Annex D (informative) Example of the determination of the uncertainty in the concentrati
18、on of a calibration gas mixture prepared by the continuous injection method 12 Bibliography . 15 BSENISO61454:2008blank v Introduction This part of ISO 6145 is one of a series of standards dealing with various dynamic volumetric methods used for the preparation of calibration gas mixtures. BSENISO61
19、454:2008blankANRETNIITOTS LANDNADRA OSI -54164002:4)E( ISO 2004 All rights reserved 1 Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 4: Continuous syringe injection method 1S c o p e This part of ISO 6145 specifies a method for continuous production of cal
20、ibration gas mixtures, containing two or more components, from pure gases or other gas mixtures by continuous injection of the calibration component(s) into a complementary gas stream by means of a syringe. If pre-mixed gases are used instead of pure gases (see Annex A), much lower volume fractions
21、can be obtained. The volume flow rates, from which the volume fractions are determined, can be calculated from the individual flow rates and can be independently measured by a suitable method given in ISO 6145-1. The merits of the method are that a substantial quantity of the gas mixture can be prep
22、ared on a continuous basis and that multi-component mixtures can be prepared almost as readily as binary mixtures if the appropriate number of syringes is utilized, or if the syringe already contains a multi-component mixture of known composition. This method also provides a convenient means for inc
23、reasing the volume fraction of the calibration component in the mixture in small steps. It is therefore a useful method for evaluation of other characteristics of gas analysers, such as minimum detection limit and dead zone, as well as accuracy. The relative expanded uncertainty in the volume fracti
24、on obtainable for a binary mixture (at a coverage factor of 2) isand the range of applicability is to . 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the
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