ASTM F1663-15
(Test Method)Standard Test Method for Determining the Capacitance of a Membrane Switch or Printed Electronic Device (Withdrawn 2024)
Standard Test Method for Determining the Capacitance of a Membrane Switch or Printed Electronic Device (Withdrawn 2024)
SIGNIFICANCE AND USE
3.1 Capacitance testing is useful for design verification, quality control of materials, and workmanship.
3.2 High capacitance may interfere with the reliable performance of interface electronics.
3.3 Specific areas of testing are, but not limited to:
3.3.1 Conductor/dielectric/conductor crossing point,
3.3.2 Close proximity of conductors, and
3.3.3 Any other conductive surface such as shielding or metal backing panel.
SCOPE
1.1 This test method covers the determination of capacitance(s) of a membrane switch or printed electronic device.
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.
WITHDRAWN RATIONALE
This test method covers the determination of capacitance(s) of a membrane switch or printed electronic device.
Formerly under the jurisdiction of Committee F01 on Electronics, this test method was withdrawn in January 2024 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
General Information
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Standards Content (Sample)
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: F1663 − 15
Standard Test Method for
Determining the Capacitance of a Membrane Switch or
1
Printed Electronic Device
This standard is issued under the fixed designation F1663; 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 4. Interferences
4.1 The following parameters may affect the results of this
1.1 This test method covers the determination of capaci-
tance(s) of a membrane switch or printed electronic device. test:
4.1.1 Humidity,
1.2 This standard does not purport to address all of the
4.1.2 Contamination,
safety concerns, if any, associated with its use. It is the
4.1.3 Barometric pressure, and
responsibility of the user of this standard to establish appro-
4.1.4 Temperature.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5. Apparatus
1.3 This international standard was developed in accor-
5.1 Electronic Test Instrument , for measuring very small
dance with internationally recognized principles on standard-
capacitance (pico-farad range).
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
6. Procedure
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
6.1 Pretest Setup:
6.1.1 Suspend the switch specimen in air or otherwise
2. Terminology
isolate it from any interfering affects.
6.1.2 Attach to the capacitance measuring instrument any
2.1 Definitions:
necessary leads, probes or connectors required to connect the
2.1.1 membrane switch—a momentary switching device in
membrane switch assembly or printed electronic device for
which at least one contact is on, or made of, a flexible
measurement. Place test leads as close to test points as possible
substrate.
without physical connection. (This will reduce any variations
2.1.2 test points—two preselected mutually insulated loca-
due to lead positioning).
tions on switch assembly.
6.1.3 Record the capacitance reading indicated on the in-
strument to equal capacitance (C ) (this is the capacitance of
i
3. Significance and Use
the test setup).
3.1 Capacitance testing is useful for design verification,
6.2 In-Process Test:
quality control of materials, and workmanship.
6.2.1 Connect test leads to the test points.
3.2 High capacitance may interfere with the reliable perfor- 6.2.2 Record the capacitance reading indicated on the in-
mance of interface electronics. strument to equal total capacitance (C ) (this is the total
t
capacitance of the switch and device.
3.3 Specific areas of testing are, but not limited to:
3.3.1 Conductor/dielectric/conductor crossing point,
7. Calculation
3.3.2 Close proximity of conductors, and
7.1 Calculate the capacita
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1663 − 09 F1663 − 15
Standard Test Method for
Determining the Capacitance of a Membrane Switch or
1
Printed Electronic Device
This standard is issued under the fixed designation F1663; 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
1.1 This test method covers the determination of capacitance(s) of a membrane switch.switch or printed electronic device.
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.
2. Terminology
2.1 Definitions:
2.1.1 membrane switch—a momentary switching device in which at least one contact is on, or made of, a flexible substrate.
2.1.2 test points—two preselected mutually insulated locations on switch assembly.
3. Significance and Use
3.1 Capacitance testing is useful for design verification, quality control of materials, and workmanship.
3.2 High capacitance may interfere with the reliable performance of interface electronics.
3.3 Specific areas of testing are, but not limited to:
3.3.1 Conductor/dielectric/conductor crossing point,
3.3.2 Close proximity of conductors, and
3.3.3 Any other conductive surface such as shielding or metal backing panel.
4. Interferences
4.1 The following parameters may affect the results of this test:
4.1.1 Humidity,
4.1.2 Contamination,
4.1.3 Barometric pressure, and
4.1.4 Temperature.
5. Apparatus
5.1 Electronic Test Instrument , for measuring very small capacitance (pico-farad range).
6. Procedure
6.1 Pretest Setup:
6.1.1 Suspend the switch specimen in air or otherwise isolate it from any interfering affects.
6.1.2 Attach to the capacitance measuring instrument any necessary leads, probes or connectors required to connect the
membrane switch assembly or printed electronic device for measurement. Place test leads as close to test points as possible without
physical connection. (This will reduce any variations due to lead positioning).
6.1.3 Record the capacitance reading indicated on the instrument to equal capacitance (C ) (this is the capacitance of the test
i
setup).
1
This test method is under the jurisdiction of ASTM Committee F01 on Electronics and is the direct responsibility of Subcommittee F01.18 on Membrane SwitchesPrinted
Electronics.
Current edition approved June 15, 2009June 1, 2015. Published July 2009July 2015. Originally approved in 1995. Last previous edition approved in 20022009
...
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