EN ISO 6145-7-2010 en Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 7 Thermal mass-flow controllers《气体分析 用动态容量法制备校准气体混合物 第7部分 热质流控制.pdf
《EN ISO 6145-7-2010 en Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 7 Thermal mass-flow controllers《气体分析 用动态容量法制备校准气体混合物 第7部分 热质流控制.pdf》由会员分享,可在线阅读,更多相关《EN ISO 6145-7-2010 en Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 7 Thermal mass-flow controllers《气体分析 用动态容量法制备校准气体混合物 第7部分 热质流控制.pdf(24页珍藏版)》请在麦多课文档分享上搜索。
1、BS EN ISO6145-7:2010ICS 71.040.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDGas analysis Preparation ofcalibration gasmixtures usingdynamic volumetricmethodsPart 7: Thermal mass-flow controllersThis British Standardwas published under theauthority of the St
2、andardsPolicy and StrategyCommittee on 30 April2009 BSI 2011ISBN 978 0 580 72205 930 June 2011 This corrigendum renumbers BS ISO 6145-7:2009as BS EN ISO 6145-7:2010BS EN ISO 6145-7:2010National forewordThis British Standard is the UK implementation of EN ISO 6145-7:2010. It is identical to ISO 6145-
3、7:2009. It supersedes BS ISO 6145-7:2009which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PTI/15, Natural gas and gas analysis.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purpo
4、rt to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.Amendments/corrigenda issued since publicationDate Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
5、ISO 6145-7 December 2010 ICS 71.040.40 English Version Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 7: Thermal mass-flow controllers (ISO 6145-7:2009) Analyse des gaz - Prparation des mlanges de gaz pour talonnage laide de mthodes volumtriques dynami
6、ques - Partie 7: Rgulateurs thermiques de dbit massique (ISO 6145-7:2009) Gasanalyse - Herstellung von Kalibriergasgemischen mit Hilfe von dynamisch-volumetrischen Verfahren - Teil 7: Thermische Massendurchflussregler (ISO 6145-7:2009) This European Standard was approved by CEN on 11 December 2010.
7、CEN members are 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 a
8、pplication to the CEN-CENELEC 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-CENELEC
9、 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, N
10、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitat
11、ion in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6145-7:2010: EForeword The text of ISO 6145-7:2009 has been prepared by Technical Committee ISO/TC 158 “Analysis of gases” of the International Organization for Standardization (ISO) and has been taken over
12、 as EN ISO 6145-7:2010. 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 June 2011, and conflicting national standards shall be withdrawn at the latest by June 2011. Attention is drawn to the possi
13、bility 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 Internal Regulations, the national standards organizations of the following countries ar
14、e bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Sp
15、ain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 6145-7:2009 has been approved by CEN as a EN ISO 6145-7:2010 without any modification. BS EN ISO 6145-7:2010EN ISO 6145-7:2010 (E)iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and defini
16、tions. 1 4 Principle. 2 5 Set-up. 2 5.1 General. 2 5.2 Thermal mass-flow controller using a constant current supply 2 5.3 Thermal mass-flow controller under constant temperature control . 3 6 Preparation of gas mixtures 4 6.1 Description of the experimental procedure .4 6.2 Area of validity 6 6.3 Op
17、erating conditions 6 7 Calculations. 7 7.1 Volume fraction. 7 7.2 Sources of uncertainty. 7 7.3 Uncertainty of measurement . 8 Annex A (informative) Pre-mixed gases for preparation of mixtures of high dilution 9 Annex B (informative) Practical hints. 10 Annex C (informative) Calculation of uncertain
18、ties 12 Bibliography . 15 ISO 2011BS EN ISO 6145-7:2010EN ISO 6145-7:2010 (E)iv Foreword ISO (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
19、ISO technical committees. Each member body interested 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
20、 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards.
21、 Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this
22、document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6145-7 was prepared by Technical Committee ISO/TC 158, Analysis of gases. This second edition cancels and replaces the first edition (ISO 6145-7:2001). In preparation of
23、 the first edition, it was assumed that each thermal mass-flow controller (TMC) would be configured for use at its optimum performance, and the uncertainty in the method was estimated on that basis. In this edition, therefore, extra precautionary text has been added to make it clear that the method
24、shall not be employed, for example, to make a 10:1 binary mixture by using two thermal mass-flow controllers of identical range with one operated at its maximum, say, of 1 000 ml/min and the other at 100 ml/min. In the first edition, this necessary provision was only stated briefly in an informative
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