ASTM F1662-95
(Test Method)Standard Test Method for Verifying the Specified Dielectric Withstand Voltage of a Member Switch
Standard Test Method for Verifying the Specified Dielectric Withstand Voltage of a Member Switch
SCOPE
1.1 This test method covers the verification of a specified dielectric withstand voltage of a membrane switch.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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 1662 – 95
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
Verifying the Specified Dielectric Withstand Voltage of a
1
Membrane Switch
This standard is issued under the fixed designation F 1662; 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 5. Apparatus
1.1 This test method covers the verification of a specified 5.1 Electric Device, suitable to provide a controlled dc or ac
dielectric withstand voltage of a membrane switch. voltage.
6. Procedure
2. Terminology
6.1 Pretest Setup:
2.1 Definitions:
6.1.1 Measure the insulation resistance between the two test
2.1.1 dielectric withstand voltage—the maximum voltage a
points. Record insulation resistance as R .
dielectric can withstand without a visual change from a voltage i
6.1.2 Connect two test points on the switch assembly to the
discharge or specified change of insulation resistance, or both.
voltage source.
2.1.2 insulation resistance, R—the electrical resistance be-
6.2 In-Process Test—Constant Voltage Method:
tween test points.
6.2.1 Adjust voltage and frequency to a specified level.
2.1.3 membrane switch—a momentary switching device in
6.2.2 Apply voltage to switch assembly for a specified
which at least one contact is on, or made of, a flexible
interval.
substrate.
6.3 In Process Test—Ramp Voltage Method:
2.1.4 test points—two preselected mutually insulated loca-
6.3.1 Set the following parameters to specified levels (if
tions on switch assembly.
applicable):
6.3.1.1 Voltage ramp rate, and
3. Significance and Use
6.3.1.2 Maximum ramp voltage.
3.1 Dielectric withstand voltage testing is useful for design
6.3.2 Perform test.
verification, quality control of materials, and workmanship.
6.4 Disconnect switch assembly from power supply.
3.2 This test is designed to determine product integrity and
6.5 Inspect switch assembly for visual change.
resistance at voltage levels that exceed normal operating levels.
6.6 Measure the insulation resistance using the same proce-
3.3 Specific areas of testing are, but not limited to:
dure used in 6.1.1.
3.3.1 Conductor/dielectric/conductor crossing point,
6.7 Record insulation resistance as R .
f
3.3.2 Close proxi
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