ASTM F2073-01(2006)

Standard Test Method for Non-Destructive Short Circuit Testing of a Membrane Switch

SIGNIFICANCE AND USE
Destructive and non-destructive tests characteristics must be evaluated to ensure the membrane switch will operate and survive the application it was designed for. It is not feasible for all tests to be performed on each membrane of a production lot. However, there are some non-destructive tests that must be performed on each switch assembly to ensure 100 % functionality and checking each i/o point for unwanted electrical continuity to any other i/o point is one of these characteristics.
SCOPE
1.1 This standard establishes a test method for detecting unwanted electrical shorts in a membrane switch.
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 its intended environment.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Jun-2006
• ICS: 31.220.20 - Switches
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.18 - Printed Electronics

Relations

• Replaces: ASTM F2073-01 - Standard Test Method for Non-Destructive Short Circuit Testing of a Membrane Switch
• Effective Date: 01-Jul-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F2073 − 01(Reapproved 2006)
Standard Test Method for
Non-Destructive Short Circuit Testing of a Membrane
Switch
This standard is issued under the fixed designation F2073; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope performed on each switch assembly to ensure 100 % function-
ality and checking each i/o point for unwanted electrical
1.1 This standard establishes a test method for detecting
continuity to any other i/o point is one of these characteristics.
unwanted electrical shorts in a membrane switch.
1.2 Since this is a non-destructive test, it can be performed 4. Apparatus
on a membrane switch that is going to be mounted and used in
4.1 Electrical Tester, capable of measuring the electrical
its intended environment.
resistance between two test points.
1.3 This standard does not purport to address all of the
4.1.1 Electrical Tester must be capable of detecting a short
safety concerns, if any, associated with its use. It is the
when a resistance is measured between any of the test points
responsibility of the user of this standard to establish appro-
that is less than an open circuit resistance.
priate safety and health practices and determine the applica-
4.1.2 Since this is a non-destructive test the applied voltage
bility of regulatory limitations prior to use.
should not exceed operating voltage selected appropriately.
2. Terminology 5. Procedure
2.1 Definitions:
5.1 Pretest Setup:
2.1.1 short—unwanted electrical connection between two 5.1.1 Connect test points of the switch assembly to the
test points having a resistance lower than the specified open
Electrical Tester.
circuit resistance. 5.1.2 Adjust test voltage source as necesary.
5.1.3 Adjust threshold resistance to the open circuit resis-
2.1.2 membrane switch—a momentary switching device in
tance.
which at least one contact is on, or made of, a flexible
substrate.
5.2 In-Process Test:
5.2.1 Test first test point for shorts between all other test
2.1.3 open circuit resistance—minimum allowable resis-
points and record results.
tance as measured between two test points that, if lower than,
5.2.2 Test second test point for shorts between all other test
will indicate an electrical short.
points and record results.
2.1.4 test point—an electrical input or outpoint connection
5.2.3 Repeat until all test points
...