ASTM F1680-96

Standard Test Method for Determining Circuit Resistance of a Membrane Switch

SCOPE
1.1 This test method covers the determination of the circuit resistance of a membrane switch utilizing a predetermined force.  
1.2  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: 09-Jan-2002
• ICS: 19.080 - Electrical and electronic testing
• ICS: 29.120.40 - Switches
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.18 - Printed Electronics

Relations

• Replaced By: ASTM F1680-02 - Standard Test Method for Determining Circuit Resistance of a Membrane Switch
• Effective Date: 10-Jan-2002

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: F 1680 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
1
Determining Circuit Resistance of a Membrane Switch
This standard is issued under the fixed designation F 1680; 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
1.1 This test method covers the determination of the circuit
resistance of a membrane switch utilizing a predetermined
force.
1.2 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D 2240 Test Method for Rubber Property-Durometer Hard-
FIG. 1 Test Probe Option
2
ness
device should not apply a voltage outside the operating range
3. Terminology
of the switch contacts.
3.1 Definitions:
5.5 Suitable Device, to apply a predetermined force on test
3.1.1 circuit resistance—electrical resistance as measured
probe.
between two terminations whose internal contacts, when held
closed, complete a circuit.
6. Procedure
3.1.2 membrane switch—a momentary switching device in
6.1 Pre-Test Setup:
which at least one contact is on, or made of, a flexible
6.1.1 Secure switch on test surface.
substrate.
6.1.1.1 Precondition switch by depressing manually 25
times.
4. Significance and Use
6.1.2 Position test probe over desired area of switch.
4.1 Resistance is useful to manufacturers and users when
6.1.3 Lower probe until tip is just above top surface of
designing membrane switch interface circuitry.
switch without touching.
6.1.4 Connect switch terminals to resistance measuring
5. Apparatus
device.
5.1 Test Probe, built to either of the configurations shown in
6.2 In-Process Test:
Fig. 1 or Fig. 2, are acceptable but must be made of an inert
6.2.1 Depress switch with probe until predetermined force
elastomeric material with a
...