ASTM F2073-00
(Test Method)Standard Test Method for Non-Destructive Short Circuit Testing of a Membrane Switch
Standard Test Method for Non-Destructive Short Circuit Testing of a Membrane Switch
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.
1.3 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.
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Designation: F 2073 – 00
Standard Test Method for
Non-Destructive Short Circuit Testing of a Membrane
Switch
This standard is issued under the fixed designation F 2073; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope lot. However, there are some non-destructive tests that must be
performed on each switch assembly to ensure 100 % function-
1.1 This standard establishes a test method for detecting
ality and checking each i/o point for unwanted electrical
unwanted electrical shorts in a membrane switch.
continuity to any other i/o point is one of these characteristics.
1.2 Since this is a non-destructive test, it can be performed
4.2 Since this is a non-destructive test the applied voltage
on a membrane switch that is going to be mounted and used in
should not exceed operating voltage.
its intended environment.
1.3 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Electrical Tester, capable of measuring the electrical
responsibility of the user of this standard to establish appro-
resistance between two test points.
priate safety and health practices and determine the applica-
5.1.1 Electrical Tester must be capable of detecting a short
bility of regulatory limitations prior to use.
when a resistance is measured between any of the test points
2. Referenced Documents that fall below an open circuit resistance.
2.1 ASTM Standards:
6. Procedure
F 1680 Test Method for Determining the Circuit Resistance
2 6.1 Pretest Setup:
of a Membrane Switch
6.1.1 Connect all test points of the switch assembly to the
3. Terminology Electrical Tester.
6.2 In-Process Test:
3.1 Definitions:
6.2.1 Adjust voltage source to specified voltage.
3.1.1 short—unwanted electrical connection between two
6.2.2 Adjust threshold resistance to the open circuit resis-
test points having a resistance lower than, or equal to, the
tance.
specified open circuit resistance.
6.2.3 Test first test point for shorts between all other test
3.1.2 membrane switch—a momentary switching device in
points.
which at least one contact is on, or made of, a flexible
6.2.4 Test second test point for shorts between all other test
substrate.
points.
3.1.3 open circuit resistance—minimum allowable resis-
...
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