Designation:F2592−10StandardTestMethodforMeasuringtheForce-DisplacementofaMembraneSwitch1ThisstandardisissuedunderthefixeddesignationF2592;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementofforcedisplacementcharacteristicsofamembraneswitch.1.1.1ThistestmethodreplacesTestMethodF1570(TactileRatio).TactileActuatingSlopeAngleandTactileRecoverySlopeAnglebetterrepresentthecharacterizationoftactilesensation,previouslycalled“TactileRatio”inTestMethodF1570.1.1.2ThistestmethodreplacesTestMethodF1682(Travel).1.1.3ThistestmethodreplacesTestMethodF1597(Actua-tionandContactForce).1.1.4ThistestmethodreplacesTestMethodF1997(SwitchSensitivity).1.2ForcedisplacementhysterisisloopcurvecanbeusedinthedeterminationofActuationForce,Displacement,ContactForce,ReturnForce,andTactileActuatingSlopeAngleandTactileRecoverySlopeAngle.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definitions:2.1.1breakdisplacement(Tb)—thedisplacementatcontactbreak.2.1.2breakforce(Fb)—theforceatcontactbreak.2.1.3circuitresistance—electricalresistanceasmeasuredbetweentwotestpointswhoseinternalcontacts,whenheldclosed,completeacircuit.2.1.4closure(make)—theeventatwhichaspecifiedresis-tanceisachieved.2.1.5contactbreak—pointatwhichcircuitresistanceishigherthanspecifiedresistanceonreturn.2.1.6contactdisplacement(Tc)—thedisplacementatcon-tactclosure.2.1.7contactforce(Fc)—theforceatcontactclosure.2.1.8displacement—measureddistanceofmovementwhenmembraneisdepressed.2.1.8.1Discussion—Displacementissometimesreferredtoas“switchtravel.”2.1.9Fmax—anappliedfo...
