ASME_B89.7.1-2016.pdf

ASME B89.7.1-2016(Technical Report)Guidelines for Addressing Measurement Uncertainty in the Development and Application of ASME B89 StandardsASME B89.7.1-2016(Technical Report)Guidelines forAddressingMeasurementUncertainty in theDevelopment andApplication of ASMEB89 StandardsDate of Issuance:May 31,2016This Technical Report will be revised when the Society approves the issuance of a new edition.ASME is the registered trademark of The American Society of Mechanical Engineers.ASME does not“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumesanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatent rights,and the risk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government orindustry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASMEprocedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2016 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B89 Committee.vi1Scope.12Definitions.13References.24Calibration and Verification Testing.35Documenting Measurement Uncertainty and Metrological Traceability in ASME B89 Standardsand Technical Reports.56Uncertainty-Related Recommendations for ASME B89 Standards.6Nonmandatory AppendicesACalibration Examples.9BDocumenting Measurement Uncertainty in ASME B89 Standards and Technical Reports.11CDocumenting Measurement Uncertainty in a Summary Matrix.12Figures4.1-1Relationship Between Calibration and Verification.4C-1-1Example of an Uncertainty Matrix Format.12iiiFOREWORDThis Technical Report provides general principles for addressing measurement uncertainty that apply to the use ofASMEB89standards.ThisTechnicalReportalsoprovidesrecommendationsregardingmeasurementuncertaintyforuseinthedevelopmentofASMEB89standards.ThisTechnicalReportisconcernedwiththeapplicationanddocumentationof measurement uncertainty but not with methods for the estimation of measurement uncertainty.A number of challenging requirements have been introduced to dimensional metrology practice in recent yearsthrough new developments in ISO/IEC 17025 accreditation,measurement uncertainty,and conformance decisionrules.Many of these requirements are related to the broad concept of measurement uncertainty management.TheASME B89.7 series of standards and technical reports has been developed to help users understand and meetthese new uncertainty-related requirements.Toachieveitspurpose,thisTechnicalReportintroducesgeneralconceptsassociatedwithcalibrationandverificationtesting.This Technical Report clarifies existing terms and introduces new terms and definitions in an attempt to stan-dardize practices within ASME B89 standards and across the dimensional metrology field.Thereareeffortsongoingtodevelopstandards and toprepareindustryto addresstheissues related tomeasurementuncertaintyandtheincreasingrecognitionofitsimportanceincommerce.Theseeffortsaimtosupporttheconsiderationof measurement uncertainty in measurement plans.Until recently,many existing ASME B89 standards did not addressmeasurement uncertainty.This Technical Report provides guidelines for documenting the treatment of uncertaintycontributions.These guidelines support the use and documentation of a methodology recognized as consistentwith the concepts outlined in JCGM 100,Guide to the Expression of Uncertainty in Measurement(GUM).Applying common guidelines in development of all ASME B89 standards,where appropriate,will ensure consistency,facilitate the approval process,and improve intelligibility for buyers and sellers who use ASME B89 standards.Acknowledgment.This work was initiated and originally chaired by the late John Buttress,and his contribution isrecognized and appreciated by the ASME B89 Committee.ivASME B89 COMMITTEEDimensional Metrology(The following is the roster of the Committee at the time of approval of this Technical Report.)STANDARDS COMMITTEE OFFICERST.Charlton,Jr.,ChairS.D.Phillips,Vice ChairR.Richmond,SecretarySTANDARDS COMMITTEE PERSONNELT.Charlton,Jr.,Charlton AssociatesD.J.Christy,Mahr Federal,Inc.B.Crowe,Schneider ElectricJ.D.Drescher,UTC Pratt and WhitneyM.L.Fink,BoeingG.A.Hetland,InternationalInstituteofGeometricDimen