ASTM_D_2865_-_01.pdf

Designation:D 2865 01An American National StandardStandard Practice forCalibration of Standards and Equipment for ElectricalInsulating Materials Testing1This standard is issued under the fixed designation D 2865;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice provides for the establishment and main-tenance of calibration procedures for measuring and testequipment used for electrical insulating materials.It provides aframework of concepts and practices,with definitions andspecifications pertaining to measurement,adequacy of stan-dards,necessary environmental controls,tables of corrections,intervals of calibration,calibration procedures,calibration ofstandards,and personnel training system documentation.1.2 This practice is intended for control of the accuracy ofthe equipment used for measurements that are made in accor-dance with ASTM standards or other specified requirements.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 1711 Terminology Relating to Electrical Insulation2D 2645 Tolerances forYarns Spun on the Cotton or WorstedSystems3D 6054 Practice for Conditioning Electrical Insulating Ma-terials for Testing4E 171 Specification for Standard Atmospheres for Condi-tioning and Testing Flexible Barrier Materials5E 177 Practice for Use of the Terms Precision and Bias inASTM Test Methods63.Terminology3.1 DefinitionsMany definitions concerning calibration ofstandards and equipment are generally understood or defined inother ASTM standards such as Practice E 177 and D 2645.Only those terms bearing on interpretations are described here.3.1.1 See Terminology D 1711 for terms pertaining to elec-trical insulating materials.3.2 Definitions of Terms Specific to This Standard:3.2.1 accuracy ratio,nsee uncertainty ratio.3.2.2 adequacy of a standard,nthe quality or state of astandard that exhibits and maintains the required accuracy andstability under the conditions of usage.3.2.3 calibration,nthe process of comparing a standard oran instrument with one of greater accuracy(smaller uncer-tainty)for the purpose of obtaining quantitative estimates ofthe actual value of the standard being calibrated,the deviationof the actual value from the nominal value,or the differencebetween the value indicated by an instrument and the actualvalue.3.2.3.1 DiscussionThese differences are usually tabulatedin a“Table of Corrections”which apply to that particularstandard or instrument.3.2.4 calibration labeling,n for measurement equipmentor standards,a means to indicate the date of latest calibration,by whom it was calibrated,and the due date for the nextcalibration.3.2.5 certificationsee traceability to NIST(formerlyNBS).3.2.5.1 DiscussionIn the past,certification has been usedto convey the meaning of either or both of the above terms.Since NIST no longer issues certificates of calibrations,theterm has come to have a specialized meaning.The following isquoted from NBS Special Publication 250,“Calibration andTest Services of the National Institute of Standards andTechnology”,1968 edition:“Results of calibrations and other tests are issued to the customer asformal reports entitled,“National Institute of Standards and TechnologyReport of Calibration”,“National Institute of Standards and Technol-ogy Report of Test”,or“National Institute of Standards and TechnologyReport of Analysis”,as appropriate.Copies are not supplied to otherparties.Whenever formal certification is required by law,or to meetspecial conditions adjudged by the National Institute of Standards andTechnology to warrant it,a letter will be provided certifying that theparticular item was received and calibrated or tested and identifying thereport containing the results.”1This practice is under the jurisdiction of ASTM Committee D09 on Electricaland Electronic Insulating Materials and is the direct responsibility of SubcommitteeD09.12 on Electrical Tests.Current edition approved Mar.10,2001.Published May 2001.Originallypublished as D 2865 70.Last previous edition D 2865 95.2Annual Book of ASTM Standards,Vol 10.01.3Annual Book of ASTM Standards,Vol 07.01.4Annual Book of ASTM Standards,Vol 10.02.5Annual Book of ASTM Standards,Vol 15.09.6Annual Book of ASTM Standards,Vol 14.02.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.3.2.6 degree of usage,nthe summation of all factorsbearing upon the stability of accuracy and reproducibility of astandard or an instrument.3.2.6.1 DiscussionSome,bu