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ASTM F1762-02

(Practice)

Standard Practice for Exposing a Membrane Switch to Variation in Atmospheric Pressure

Standard Practice for Exposing a Membrane Switch to Variation in Atmospheric Pressure

SIGNIFICANCE AND USE
Erratic operation or malfunction of a membrane switch resulting from changes in the specified switch characteristics,
Rupture, implosion or explosion of seals due to pressure variations,
Change in physical or chemical properties due to pressure differentiations, and
Delaminations of a membrane switch may occur due to pressure variations.
SCOPE
1.1 This practice covers a procedure for exposing a membrane switch to variations in atmospheric pressure. It can be used to determine the effects of pressure variations on chemical and mechanical properties and functional characteristics of the switch.

General Information

Status
Historical
Publication Date
09-Jan-2002
ICS
31.220.20 - Switches
Technical Committee
F01 - Electronics
Drafting Committee
F01.18 - Printed Electronics
Current Stage
Ref Project

Relations

Replaces
ASTM F1762-97 - Standard Practice for Exposing a Membrane Switch to Variation in Atmospheric Pressure
Effective Date
10-Jan-2002
Replaced By
ASTM F1762-07 - Standard Practice for Exposing a Membrane Switch to Variation in Atmospheric Pressure
Effective Date
01-Dec-2007

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ASTM F1762-02 - Standard Practice for Exposing a Membrane Switch to Variation in Atmospheric PressureASTM F1762-02 - Standard Practice for Exposing a Membrane Switch to Variation in Atmospheric Pressure
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ASTM F1762-02 - Standard Practice for Exposing a Membrane Switch to Variation in Atmospheric Pressure
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 1762–02
Standard Practice for
Exposing a Membrane Switch to Variation in Atmospheric
1
Pressure
This standard is issued under the fixed designation F 1762; 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 a procedure for exposing a mem- 4.1 Erratic operation or malfunction of a membrane switch
brane switch to variations in atmospheric pressure. It can be resulting from changes in the specified switch characteristics,
used to determine the effects of pressure variations on chemical 4.2 Rupture, implosion or explosion of seals due to pressure
and mechanical properties and functional characteristics of the variations,
switch. 4.3 Change in physical or chemical properties due to pres-
sure differentiations, and
2. Referenced Documents
4.4 Delaminations of a membrane switch may occur due to
2
2.1 ASTM Standards:
pressure variations.
F 1570 Test Method for Determining the Tactile Ratio of a
5. Interferences
Membrane Switch
F 1597 Test Method for Determining the Actuation Force 5.1 Time duration before, during and after pressure cycling,
and Contact Force of a Membrane Switch 5.2 Temperature,
5.3 Humidity,
3. Terminology
5.4 Mounting Method (if applicable).
3.1 Definitions:
6. Apparatus
3.1.1 circuit resistance—electrical resistance as measured
between two test points whose internal contacts, when held 6.1 Pressure Chamber, a chamber or cabinet capable of
closed, complete a circuit. maintaining a specified pressure. If procedurally required, the
3.1.2 contact closure—the event at which a specified resis- apparatus shall be capable of providing pressure variation at a
tance is achieved on a membrane switch. specified rate.
3.1.3 membrane switch—a momentary switching device in 6.2 Monitoring Device, suitable to detect contact closure
which at least one contact is on, or made of, a flexible (that is, ohm meter, etc.).
substrate.
7. Conditioning
3.1.4 specified resistance—the maximum allowable circuit
7.1 Condition all specimens for 72 h at ambient laboratory
resistance as measured between two test points whose internal
contacts, when held closed, complete a circuit. conditions immediately prior to exposure, or prior to pressure
cycling. This is to enable the specimens to stabilize.
3.1.5 test points—two preselected conductive points in a
circuit loop, possibly including a switch.
8. Procedure
8.1 Pretest Setup:
8.1.1 Measure or observe the desired characteristics of the
1
This test method is under the jurisdiction of ASTM Committee F01 on
switch so that comparable measurements and observations can
Electronics and is the direct responsibility of Subcommittee F01.18 on Membrane
be made during or after the test.
Switches.
8.
...

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