1、BRITISH STANDARDBS5470:1977盈Specification forAdooGlass alcoholhydrometers notincorporating athermometerUDC531.756.3:542.3:661.722NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS5470:1977ContentsPageCooperating organizationsInside front coverForeword1Scope and field of applica
2、tion12 References13Basis of scales4Description15Materials and workmanship16Scale1Graduation and numbering28Surface tension29Dimensions210Inscriptions211Accuracy and testing212Determination of temperature2Appendix A Testing of British Standard hydrometers4Figure 1-Style of graduation for alcohol hydr
3、ometers3Table 1-Density and surface tension2Publications referred to60BSI12.1999iBS5470:1977ForewordThis British Standard was published under the authority of the LaboratoryApparatus Standards Committee following consultations between Governmentdepartments,manufacturers and users of alcohol hydromet
4、ers.It was preparedat the request of HM Customs and Excise in support of an intended statutoryinstrument to implement a Council Directive of the EEC1),and covers only thoseinstruments which are expected to be used in the United Kingdom;it thusexcludes alcoholometers(indicating strength as%m/m or V/V
5、,instrumentsincorporating a thermometer,and instruments of class I or class III accuracy asdefined in the EEC Directive.The requirements of this British Standard align with those of two draftInternational Standards for hydrometers,ISO/DIS 3872)and ISO/DIS 48012),insofar as they were known at the tim
6、e of preparation.These InternationalStandards were in course of preparation by Sub-committee 4,Hydrometers,ofISO Technical Committee 48,Laboratory glassware and related apparatus.The expression graduation linewhich appears in clauses 6,7 and 9,anddatum markwhich appears in 4.5 are internationally ac
7、cepted terminology,and are equivalent to the expressions“scale mark”and“reference mark”respectively,used in the Directive.Information on the testing of the hydrometers is given in Appendix A.Certification.Attention is drawn to the certification facilities described onthe inside back cover of this st
8、andard.A British Standard does not purport to include all the necessary provisions of acontract.Users of British Standards are responsible for their correct application.Compliance with a British Standard does not of itself confer immunityfrom legal obligations.Summary of pagesThis document comprises
9、 a front cover,an inside front cover,pages i and ii,pages 1 to 6,an inside back cover and a back cover.This standard has been updated(see copyright date)and may have hadamendments incorporated.This will be indicated in the amendment table on theinside front cover.DCouncil Directive of 27 July 1976,76/765/EEC on the approximation of the laws of the MemberdhydrometerBSI12.1999