ASTM_F_2114_-_02.pdf

Designation:F 2114 02Standard Guide forASTM Standard Test Methods,Standard Practices,andTypical Values of a Membrane Switch1This standard is issued under the fixed designation F 2114;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 guide contains a list of the current test methods andpractices generated by Subcommittee F01.18 on MembraneSwitches along with typical values for specifying certainperformance characteristics of a membrane switch.1.2 As a minimum,for any particular membrane switch,thevalues for the required characteristics should be specified.1.3 Additional performance characteristics may be requiredand should be specified accordingly.2.Referenced Documents2.1 ASTM Standards:F 1570 Test Method for Determining the Tactile Ratio of aMembrane Switch2F 1578 Practice for Contact Closure Cycling of a Mem-brane Switch2F 1595 Practice for Visual Inspection of a MembraneSwitch2F 1596 Practice for Exposure of Membrane Switches toTemperature and Relative Humidity2F 1597 Test Method for Determining the Actuation Forceand Contact Force of a Membrane Switch2F 1598 Test Method to Determine the Effects of Chemical/Solvent Exposure to a Membrane Switch/Graphic Overlay(Spot Test Method)2F 1661 Test Method for Determining the Contact BounceTime of a Membrane Switch2F 1662 Test Method for Verifying the Specified DielectricWithstand Voltage of a Membrane Switch2F 1663 Test Method for Determining the Capacitance of aMembrane Switch2F 1680 Test Method for Determining the Circuit Resistanceof a Membrane Switch2F 1682 Test Method for Determining the Travel of a Mem-brane Switch2F 1683 Practice for Creasing and Bending a MembraneSwitch,Membrane Switch Assembly or Membrane SwitchComponent2F 1689 Test Method for Determining the Insulation Resis-tance of a Membrane Switch2F 1762 Practice for Determining the Effects of Variation inAtmospheric Pressure on a Membrane Switch2F 1812 Test Method for Determining the Effectiveness ofMembrane Switch ESD Shielding2F 1843 Practice for Determining the Specular Gloss ofFlexible Substrates,both Printed and Unprinted2F 1895 Practice for Submersion of a Membrane Switch2F 1995 Test Method for Determining the Bond Strength ofa Surface Mount Device(SMD)on a Membrane Switch byApplying a Shear Force2F 1996 Test Method for Silver Migration for MembraneSwitch Circuitry2F 1997 Test Method for Determining the Sensitivity(Teas-ing)of a Tactile Membrane Switch2F 2072 Practice for Hosedown of a Membrane Switch23.Significance and Use3.1 In establishing guidelines for specifying a membraneswitch,it is important to allow application design engineers tobase their decisions on requirements using known reasonable,achievable performance levels.3.2 Over-specification increases cost and complexity;under-specification risks not meeting performance criteria.4.Procedure4.1 In specifying the performance levels of a membraneswitch,select the characteristics you require from Table 1.4.1.1 If the typical values do not meet your requirements,specify an alternative value.4.1.2 Choose only those specifications relevant to yourapplication.4.1.3 Required characteristics are the minimum require-ments to be specified for a membrane switch.Recommendedcharacteristics are appropriate to most applications.Optionalcharacteristics can be specified for more demanding applica-tions.1This guide is under the jurisdiction of ASTM Committee F01 on Electronicsand is the direct responsibility of Subcommittee F01.18 on Membrane Switches.Current edition approved Dec.10,2003.Published February 2003.2Annual Book of ASTM Standards,Vol 10.05.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.4.2 Specifically note each of the values on the detaileddrawing or specification for the membrane switch you areworking on.5.Keywords5.1 actuation force;atmospheric pressure;bend;capaci-tance;circuit resistance;contact bounce time;contact closurecycles;contact force;crease;dielectric withstand voltage;displacement;ESD;gloss;hosedown;humidity;insulationresistance;life;membrane switch;resistance;sensitivity;shear;short circuit;silver migration;SMD;solvent;submer-sion;tactile ratio;teasing;temperature;travel;visual inspec-tion;voltageASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments a