ASTM F2073-2014 Standard Test Method for Non-Destructive Short Circuit Testing of a Membrane Switch《薄膜开关无损短路检验的标准试验方法》.pdf

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1、Designation: F2073 01 (Reapproved 2006)F2073 14Standard Test Method forNon-Destructive Short Circuit Testing of a MembraneSwitch1This standard is issued under the fixed designation F2073; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis

2、ion, 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 standard establishes a test method for detecting unwanted electrical shorts in a membrane switch

3、.1.2 Since this is a non-destructive test, it can be performed on a membrane switch that is going to be mounted and used in itsintended environment.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this s

4、tandard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Terminology2.1 Definitions:2.1.1 shortunwanted electrical connection between two test points having a resistance lower than the specified open circuitresistance.2.1.2

5、 membrane switcha momentary switching device in which at least one contact is on, or made of, a flexible substrate.2.1.3 specified open circuit resistanceminimum allowable resistance as measured between two test points that, if lower than,will indicate an electrical short.2.1.4 test pointan electric

6、al input or outpoint connection on the membrane switch.3. Significance and Use3.1 Destructive and non-destructive tests characteristics must be evaluated to ensure the membrane switch will operate andsurvive the application it was designed for. It is not feasible for all tests to be performed on eac

7、h membrane of a production lot.However, there are some non-destructive tests that must be performed on each switch assembly to ensure 100 % functionality andchecking each i/o point for unwanted electrical continuity to any other i/o point is one of these characteristics.4. Apparatus4.1 Electrical Te

8、ster, capable of measuring the electrical resistance between two test points.4.1.1 Electrical Tester must be capable of detecting a short when a resistance is measured between any of the test points thatis less than an the specified open circuit resistance.4.1.2 Since this is a non-destructive test,

9、 the applied voltage should not exceed operating the specified voltage selectedappropriately.5. Procedure5.1 Pretest Setup:5.1.1 Connect test points of the switch assembly to the Electrical Tester.5.1.2 Adjust test voltage source as necesary.necessary.5.1.3 Adjust threshold resistance to the specifi

10、ed open circuit resistance.5.2 In-Process Test:5.2.1 Test first test point for shorts between all other test points and record results.1 This guide is under the jurisdiction of ASTM Committee F01 on Electronics and is the direct responsibility of Subcommittee F01.18 on Membrane Switches.Current edit

11、ion approved July 1, 2006Oct. 1, 2014. Published July 2006November 2014. Originally approved in 2000. Last previous edition approved in 20012006 asF2073F207301(2006).01. DOI: 10.1520/F2073-01R06.10.1520/F2073-14.This document is not an ASTM standard and is intended only to provide the user of an AST

12、M standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published

13、by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2.2 Test second test point for shorts between all other test points and record results.5.2.3 Repeat until all test points are checked

14、between all other test points.6. Report6.1 Report the following information:6.1.1 Specified voltage,6.1.2 Specified shorts resistance,6.1.3 Shorts found,6.1.4 Test points associated with each short, and6.1.5 Resistance value of each short.7. Keywords7.1 electrical short; insulation resistance; membr

15、ane switch; open circuit; resistance; short circuit; switch shortASTM 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 su

16、ch 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 are invite

17、d either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a

18、fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this

19、standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 142