ASTM_F_2865_-_13.pdf

Designation:F286513Standard Guide forClassifying the Degrees of Ingress of Dust and Water into aMembrane Switch1This standard is issued under the fixed designation F2865;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide establishes a classification system and refer-ences test methods for verifying the degrees of:1.1.1 The ingress of dust into the internal layers of amembrane switch.1.1.2 Ingress of water into the internal layers of a membraneswitch.1.1.3 Where external test methods are referenced,this guidespecifies the special conditions that shall be considered inapplying these tests to membrane switches and how the resultsare interpreted.1.2 This guide references test methods that can be used toestablish the ingress classification of a membrane switch.1.3 This guide utilizes the test methods and reportingstructure of IEC 60529 (Degrees of Protection Provided byEnclosures)modified for membrane switches.2.Referenced Documents2.1 ASTM Standards:2F1578 Test Method for Contact Closure Cycling of a Mem-brane SwitchF1595 Practice for Viewing Conditions for Visual Inspectionof Membrane SwitchesF1680 Test Method for Determining Circuit Resistance of aMembrane SwitchF1689 Test Method for Determining the Insulation Resis-tance of a Membrane SwitchF2592 Test Method for Measuring the Force-Displacementof a Membrane Switch2.2 IEC Standard:360529 Degrees of Protection Provided by Enclosures3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 membrane switch,na momentary switching devicein which at least one contact is on,or made of,a flexiblesubstrate.4.Classification System4.1 The ingress classification of a membrane switch isdesignated by the MSIP code:4.1.1 MSIP 6 5 A4.1.1.1 MSIP=Membrane Switch Ingress classification.4.1.1.2 1st Numeral=Dust Protection Code(see Table 1).4.1.1.3 2nd Numeral=Water(Liquid)Protection Code(seeTable 2).4.1.1.4 A=If“A”is present then method or media deviatesfrom this guide and is reported.4.1.2 The MSIP code comprises a series of numerals.Eachnumeral represents the level of ingress offered by the mem-brane switch to each contaminant.In this guide when address-ing only the 1st or 2nd numeral the other numeral is replacedwith an“X”for clarity.For example,MSIP X5 refers only totesting for water ingression.The“X”notation is not used as afinal designation.If testing is not completed a“0”is used forthat numeral(see Table 1 and Table 2).4.1.3 The numeric designations for dust and water are basedon those classified under IEC 60529.5.Significance and Use5.1 Ingression protection classifications are widely used bymanufacturers for specifying the level of protection offered byenclosures.5.2 An example of such a classification scheme is IEC60529.Membrane switch manufacturers are often asked tomeet these standards,however the test methods specifiedwithin these standards do not address considerations specific tomembrane switches.5.3 The MSIP classification system considers the membraneswitch separately from the testing and IP codes used forclassifying the enclosure when subject to similar test condi-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 Jan.1,2013.Published January 2013.Originallyapproved in 2011.Last previous edition approved in 2011 as F2865-11.DOI:10.1520/F2865-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from International Electrotechnical Commission(IEC),3,rue deVaremb,P.O.Box 131,CH-1211 Geneva 20,Switzerland,http:/www.iec.ch.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.4 Ingression testing can be useful to identify designdeficiencies.6.Interferences6.1 The membrane switch shall be tested in a mounted statespecified in this guide because this is a classification of themembrane switch only without consideration of the enclosure.6.2 The length of time between the manufacture of themembrane switch and the performance of the test.6.3 The temperature at which the test is being conducted.7.Conditioning7.1 Unless otherwise specified in a relevant productstandard,the test samples for each test shall be in a clean andnew condition,and mounted to the testing backer for 24 h.7.2 The testing backer must be a rigid transparent backer tobetter observe the ingression of dust or water into the switch.Testing backer with geometries other than flat shall be re-ported.8.Test Method for Ingress of Dust into a MembraneSwitch8.1 Appara