ASTM F1578-00

Standard Practice for Contact Closure Cycling of a Membrane Switch

SCOPE
1.1 This practice covers the setup, procedure, and apparatus required to depress and release a membrane switch to a predetermined number of cycles.  
1.2 This practice also covers the optional use of specified voltage and current during the cycling of the membrane switch.  
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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 31.220.20 - Switches
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.18 - Printed Electronics

Relations

• Replaced By: ASTM F1578-01 - Standard Practice for Contact Closure Cycling of a Membrane Switch
• Effective Date: 10-Jun-2001
• Referred By: ASTM F3291-17 - Standard Test Method for Measuring the Force-Resistance of a Membrane Force Sensor (Withdrawn 2023)
• Effective Date: 10-Jun-2001
• Referred By: ASTM F2865-13(2021) - Standard Guide for Classifying the Degrees of Ingress of Dust and Water into a Membrane Switch (Withdrawn 2023)
• Effective Date: 10-Jun-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 1578 – 00
Standard Practice for
Contact Closure Cycling of a Membrane Switch
This standard is issued under the fixed designation F 1578; 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 4. Significance and Use
1.1 This practice covers the setup, procedure, and apparatus 4.1 Contact closure cycling is useful to manufacturers and
required to depress and release a membrane switch to a users for determining the effect of repeated closing of switch
predetermined number of cycles. contacts or the effect of repeated flexure of other switch
1.2 This practice also covers the optional use of specified components.
voltage and current during the cycling of the membrane switch. 4.2 The characteristic(s) are measured before cycling begins
1.3 This standard does not purport to address all of the and then again after cycling ends.
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Suitable Electronic Monitoring Device, to detect and
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. count contact closure at a specified test rate and duty cycle.
5.2 Surface, flat, smooth, unyielding, and larger than the
2. Referenced Documents
switch.
2.1 ASTM Standards: 5.3 Test Probes, built to either of the configurations shown
D 2240 Test Method for Rubber Property—Durometer in Fig. 1 or Fig. 2, are acceptable but must be made of an inert
Hardness elastomeric material with a hardness number equivalent to
F 1597 Test Method for Determining the Actuation Force A/45 65 as measured in accordance with Test Method D 2240.
and Contact Force of a Membrane Switch Test probes that do not meet this criteria must be specified and
recorded fully.
3. Terminology
5.4 Device, which will cycle the probe repeatedly into and
3.1 Definitions:
away from the switch at a specified test rate and duty cycle, and
3.1.1 actuation force—the maximum force measured prior which is capable of providing means for counting probe cycles.
to or including the point at which contact closure is achieved
The motion of the probe should be perpendicular to the plane
on a membrane switch. of the switch.
3.1.2 contact closure—the event at which a specified resis-
5.5 Power Supply, capable of supplying specified voltage or
tance is achieved.
current, or both, if required.
3.1.3 contact force—the force at contact closure.
6. Procedure
3.1.4 duration—the number of depressions and release
cycles. 6.1 Pretest Setup:
3.1.5 duty cycle—the ratio of switch closed time to total 6.1.1 Secure the switch on a test table.
cycle time. 6.1.2 Measure the desired characteristics of the switch so
3.1.6 specified resistance—maximum allowable resistance that comparable measurements can be made during or after the
as measured between two terminations whose internal switch test.
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