ASTM F2112-02(2019)
(Terminology)Standard Terminology for Membrane Switches (Withdrawn 2023)
Standard Terminology for Membrane Switches (Withdrawn 2023)
SCOPE
1.1 This terminology defines terms that are commonly used in the membrane switch industry.
1.2 These definitions are not mutually exclusive.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
WITHDRAWN RATIONALE
This terminology defines terms that are commonly used in the membrane switch industry.
Formerly under the jurisdiction of Committee F01 on Electronics, this terminology was withdrawn in November 2023. This standard is being withdrawn without replacement because Committee F01 was disbanded.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2112 − 02 (Reapproved 2019)
Standard Terminology for
Membrane Switches
This standard is issued under the fixed designation F2112; 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 crease cycle—a 180 degree crease followed by a flattening of
the crease.
1.1 This terminology defines terms that are commonly used
in the membrane switch industry.
current carrying capacity—the maximum level of electrical
currentthatacircuitcanconductwithoutsustainingdamage.
1.2 These definitions are not mutually exclusive.
1.3 This international standard was developed in accor-
dielectric withstand voltage—the maximum voltage a dielec-
dance with internationally recognized principles on standard-
tric can withstand in a membrane switch without a visual
ization established in the Decision on Principles for the
change from a voltage discharge or specified change of
Development of International Standards, Guides and Recom-
insulation resistance, or both.
mendations issued by the World Trade Organization Technical
duty cycle—the ratio of switch closed time to total cycle time.
Barriers to Trade (TBT) Committee.
graphic layer—optional decorated layer of a membrane
2. Terminology
switch. See Fig. 1.
actuation force—the maximum force measured prior to or
insulation resistance—the electrical resistance between two
including point at which contact closure is achieved on a
isolated test points on a membrane switch.
membrane switch.
leakage current—current flow through the insulation between
bend—to force from a straight form into different and espe-
test points.
cially a curved one.
membrane layer—a flexible dynamic layer which carries one
bend cycle—a fold of a sample around a specified mandrel
or both switch poles the deflection of which is used to short
which is “rolled” in one direction, followed by rolling in the
both poles together. The membrane layer is a required
opposite direction, returning the sample to its original
component of a membrane switch. See Fig. 1.
position.
membrane switch—a momentary switching device in which
circuit resistance—electrical resistance as measured between
at least one contact is on, or made of, a flexible substrate.
two test points whose internal contacts, when held closed,
complete a circuit.
membrane switch flex tail—flexible portion of a membrane
switch used for input/output connection.
conductor resistance—the measured electrical resistance
through a circuit loop between two test points.
non–tactile switch—a switch assembly that has a tactile ratio
equal to zero.
contact bounce—intermittent contact opening and contact
closure that may occur after switch operation.
open circuit resistance—minimum allowable resistance as
contact closure—the event at which a specified resistance is measured between two test points that, if lower than, will
achieved on a membrane switch.
indicate an electrical short.
contact force—the fo
...
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: F2112 − 02 (Reapproved 2019)
Standard Terminology for
Membrane Switches
This standard is issued under the fixed designation F2112; 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 crease cycle—a 180 degree crease followed by a flattening of
the crease.
1.1 This terminology defines terms that are commonly used
in the membrane switch industry.
current carrying capacity—the maximum level of electrical
current that a circuit can conduct without sustaining damage.
1.2 These definitions are not mutually exclusive.
1.3 This international standard was developed in accor-
dielectric withstand voltage—the maximum voltage a dielec-
dance with internationally recognized principles on standard-
tric can withstand in a membrane switch without a visual
ization established in the Decision on Principles for the
change from a voltage discharge or specified change of
Development of International Standards, Guides and Recom-
insulation resistance, or both.
mendations issued by the World Trade Organization Technical
duty cycle—the ratio of switch closed time to total cycle time.
Barriers to Trade (TBT) Committee.
graphic layer—optional decorated layer of a membrane
2. Terminology
switch. See Fig. 1.
actuation force—the maximum force measured prior to or
insulation resistance—the electrical resistance between two
including point at which contact closure is achieved on a
isolated test points on a membrane switch.
membrane switch.
leakage current—current flow through the insulation between
bend—to force from a straight form into different and espe-
test points.
cially a curved one.
membrane layer—a flexible dynamic layer which carries one
bend cycle—a fold of a sample around a specified mandrel
or both switch poles the deflection of which is used to short
which is “rolled” in one direction, followed by rolling in the
both poles together. The membrane layer is a required
opposite direction, returning the sample to its original
component of a membrane switch. See Fig. 1.
position.
membrane switch—a momentary switching device in which
circuit resistance—electrical resistance as measured between
at least one contact is on, or made of, a flexible substrate.
two test points whose internal contacts, when held closed,
complete a circuit.
membrane switch flex tail—flexible portion of a membrane
switch used for input/output connection.
conductor resistance—the measured electrical resistance
through a circuit loop between two test points.
non–tactile switch—a switch assembly that has a tactile ratio
contact bounce—intermittent contact opening and contact equal to zero.
closure that may occur after switch operation.
open circuit resistance—minimum allowable resistance as
contact closure—the event at which a specified resistance is
measured between two test points that, if lower than, will
achieved on a membrane switch. indicate an electrical short.
contact force—the force at contact closure.
power capacity—electrical power is defined as current ×
volt
...
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