Designation:D6197−99(Reapproved2011)StandardTestMethodforClassifyingandCountingFaultsinSpunYarnsinElectronicTests1ThisstandardisissuedunderthefixeddesignationD6197;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheclassifyingandcountingoffaultsinspunyarnsusingcapacitancetesters.1.1.1Protrudingfibersoryarnhairiness,orboth,arenotdeterminedaspartofthismethod.NOTE1—Formeasuringprotrudingfibersorhairiness,orboth,refertoGuideD5647.1.2Thistestmethodprovidesforgradingyarnsbyfaultlevelandtype.1.3Thistestmethodisapplicabletoallsingleorpliedspunyarnsfromnaturalormanufacturedfibersorblendsofeach.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard;thevaluesininch-poundunitsareprovidedasinformationonlyandarenotexactequivalents.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD2258PracticeforSamplingYarnforTestingD5647GuideforMeasuringHairinessofYarnsbythePhoto-ElectricApparatus3.Terminology3.1Definitions:3.1.1spunyarn,n—inastaplesystem,acontinuousstrandoffibersheldtogetherbysomebindingmechanism.3.1.2yarnfault,n—intextilestrands,achangeinthicknesssufficienttobevisibletothenormalhumaneye.3.1.2.1Discussion—Inthistestmethod,avisiblechangeinthickness,suchasanabnormalthickorthinplaceintheyarnresultinginalargechangeinyarndiameteroranyforeignmatteraffixedtoorspunintotheyarn,suchasanep,isconsideredtobeafault.Thickfaultsarereportedaseithermajororminordependingonthecombinationoflengthanddiameter.Themostacceptedcriterionformajorfaults(infre-quentthickplaces)is250to400%largerthanyarndiame...
