标准资料网-标准资料免费资源平台

【英文标准名称】:Copper,leadandzincoresandconcentrates-Precisionandbiasofmassmeasurementtechniques
【原文标准名称】:铜、铅和锌矿石及精矿质量测定方法的精度和偏差
【标准号】:ISO12745-1996
【标准状态】:作废
【国别】:国际
【发布日期】:1996-07
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC183
【标准类型】:()
【标准水平】:()
【中文主题词】:铜;测量;定义;浓缩物;铅无机化合物;精密度;铜矿石;铅矿石;硫化物;质量(物质);硫化锌;锌矿石;铜无机化合物;误差;金属矿;铅;锌无机化合物
【英文主题词】:Concentrates;Copper;Copperinorganiccompounds;Copperores;Definition;Definitions;Errors;Lead;Leadinorganiccompounds;Leadores;Mass;Measurement;Metalliferousminerals;Precision;Sulphides;Zincinorganiccompounds;Zincores;Zincsulfide
【摘要】:ThisInternationalStandardprovidesguidelinestotestforbiasoverawiderangeofmassmeasurementtechniques,toestimatetheprecisionforeachtech-niqueandtocalculatetheprecisionforwetmasswhenestimatedbyapplyingoneofthosetechniques.Theguidelinesarebasedontheapplicationofstatisti-calteststoverifythatamassmeasurementtech-niqueisunbiased,toestimatethevarianceasthemostbasicmeasureforitsprecisionandtocheckthelinearityofastaticscaleoveritsworkingrange.Cali-brationmethodsandperformancetestsforcompli-ancewithapplicableregulationsgeneratetestresultsthatcanbeusedtoquantifyprecisionandbiasforeachofthesemassmeasurementtechniquesandtoverifylinearityforstaticweighingdevices.Theguidelinesapplytomassmeasurementtech-niquesusedtoestimatethewetmassforcargoesorshipmentsofmineralconcentrateasthebasisforfreightandinsurancechargesandforpreliminarypaymentsorforfinalsettlementsbetweentradingpartners.Theapplicationofstaticscalesrequiresthatatleastonecertifiedweightwithamassofnolessthanone(1)tonnebeeitheravailableonlocationorbroughtinforcalibrationpurposes,andthatthiscertifiedweightbeapplicabletothescaleinaccordancewiththemanufacturer'srecommendations.Asetofcertifiedweightscoveringtheentireworkingrangeofaweighingdevicesimplifiestheprocessofverifyingitsstateofcalibration,estimatingitsprecisionasafunc-tionofappliedloadandtestingitslinearityovertheworkingrange.
【中国标准分类号】:H13
【国际标准分类号】:73_060_99
【页数】:34P;A4
【正文语种】:英语


Product Code:SAE J2484
Title:Fastener Part Standard--Machine Screws
Issuing Committee:Ship Systems - Fasteners Committee
Scope: This SAE Part Standard covers selected machine screws manufactured in accordance with American Society for Mechanical Engineers dimensional standards. This SAE standard covers material most often used in ship systems and equipment but its use may be applied wherever fasteners of the covered materials are used. This document permits the fasteners to be identified and ordered by a part or identifying number (PIN) as defined in this document.PurposeThe purpose of this document is to assist the designer and other personnel in providing requirements and part identifying numbers for the most commonly used machine screws for ship systems and equipment. A part or identification number is normally required for all military applications and provides a useful means of communicating fastener requirements to suppliers and manufacturers in a very succinct manner.Machine Screw Part NumbersThis document provides part or identifying numbers that can be used to identify machine screws covered by this document. The parts covered by this document are manufactured in accordance with materials and processes identified in standards issued by ASTM. The part identification number (PIN) identifies the thread form, type of head, type of drive, nominal diameter, special features (plating, locking elements), nominal length and fastener material.
Rationale: This SAE Part Standard covers selected machine screws manufactured in accordance with American Society for Mechanical Engineers dimensional standards. This SAE standard covers material most often used in ship systems and equipment but its use may be applied wherever fasteners of the covered materials are used. This document permits the fasteners to be identified and ordered by a part or identifying number (PIN) as defined in this document.PurposeThe purpose of this document is to assist the designer and other personnel in providing requirements and part identifying numbers for the most commonly used machine screws for ship systems and equipment. A part or identification number is normally required for all military applications and provides a useful means of communicating fastener requirements to suppliers and manufacturers in a very succinct manner.Machine Screw Part NumbersThis document provides part or identifying numbers that can be used to identify machine screws covered by this document. The parts covered by this document are manufactured in accordance with materials and processes identified in standards issued by ASTM. The part identification number (PIN) identifies the thread form, type of head, type of drive, nominal diameter, special features (plating, locking elements), nominal length and fastener material.