Designation:F1689−05(Reapproved2012)StandardTestMethodforDeterminingtheInsulationResistanceofaMembraneSwitch1ThisstandardisissuedunderthefixeddesignationF1689;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheinsu-lationresistanceofamembraneswitch.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definitions:2.1.1insulationresistance—theelectricalresistancebe-tweentestpoints.2.1.2leakagecurrent—currentflowthroughtheinsulationbetweentestpoints.2.1.3membraneswitch—amomentaryswitchingdeviceinwhichatleastonecontactison,ormadeof,aflexiblesubstrate.2.1.4testpoints—twopreselectedconductivepointsinacircuitloop,possiblyincludingaswitch.3.SignificanceandUse3.1Insulationresistanceisusefulfordesignverification,qualitycontrolofmaterials,andworkmanship.3.2Lowinsulationresistancecancausehighleakagecur-rents.3.3Highleakagecurrentscanleadtodeteriorationoftheinsulationorfalsetriggeringoftheassociatedinputdevice,orboth.3.4Specificareasoftestingare,butnotlimitedto:3.4.1Conductor/dielectric/conductorcrossingpoint.3.4.2Closeproximityofconductors,and3.4.3Anyotherconductivesurfacesuchasshieldingormetalbackingpanel.3.5Insulationresistancemeasurementmaybedestructiveandunitsthathavebeentestedshouldbeconsideredunreliableforfutureuse.4.Interferences4.1Thefollowingparametersmayaffecttheresultofthistest:4.1.1Humidity,4.1.2Contamination,4.1.3Barometricpressure,and4.1.4Temperature.5.Apparatus5.1ElectricDevice,suitabletoprovideaconstantprese-lecteddcvoltageandsuitableelectronicmonitoringdevicetomeasureverysmallcurrentlevels(micro-ampe...
