Standard Test Method for Exposure of a Membrane Switch or Printed Electronic Device to Temperature and Relative Humidity

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PDF

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English

Published date

01-06-2015

Publisher

American Society for Testing and Materials

CONTAINED IN VOL. 10.04, 2015 Defines a procedure for temperature and humidity cycling of membrane switch or printed electronic device.

1.1This test method covers a procedure for temperature and humidity cycling of a membrane switch or printed electronic device.

1.2This test method is performed to evaluate the properties of materials used in the construction of membrane switch or printed electronic assemblies as they are influenced by the absorption and diffusion of moisture and moisture vapor. This is an accelerated environmental test, accomplished by the continuous exposure of the test specimen to high relative humidity at an elevated temperature. Absorption of moisture by many materials results in swelling, which destroys their functional utility, causes loss of physical strength, and changes in other mechanical properties. Insulating materials which absorb moisture may suffer degradation of their electrical properties.

1.2.1Physical changes:

1.2.1.1Differential contraction or expansion rates or induced strain of dissimilar materials.

1.2.1.2Cracking of surface coatings.

1.2.1.3Leaking of sealed compartments.

1.2.1.4Deformation or fracture of components.

1.2.2Chemical changes:

1.2.2.1Separation of constituents.

1.2.2.2Failure of chemical agent protection.

1.2.3Electrical changes:

1.2.3.1Changes in electronic and electrical components.

1.2.3.2Electronic or mechanical failures due to rapid water of condensate formation.

1.2.3.3Excessive static electricity.

1.3This test method is not intended to be a thermal shock procedure; a ramp rate between temperature extremes should not exceed 2°C/min.

1.4This 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.

Committee	F 01
DocumentType	Redline
Pages	3
PublisherName	American Society for Testing and Materials
Status	Current

ASTM F 1578 : 2007	Standard Test Method for Contact Closure Cycling of a Membrane Switch
ASTM F 1578 : 2007 : R2014	Standard Test Method for Contact Closure Cycling of a Membrane Switch (Withdrawn 2023)
ASTM F 2114 : 2002	Standard Guide for ASTM Standard Test Methods, Standard Practices, and Typical Values of a Membrane Switch (Withdrawn 2009)
ASTM F 1996 : 2014 : REDLINE	Standard Test Method for Silver Migration for Membrane Switch Circuitry

ASTM F 2592 : 2016 : REDLINE	Standard Test Method for Measuring the Force-Displacement of a Membrane Switch
ASTM F 1663 : 2015 : REDLINE	Standard Test Method for Determining the Capacitance of a Membrane Switch or Printed Electronic Device
ASTM F 1662 : 2016 : REDLINE	Standard Test Method for Verifying the Specified Dielectric Withstand Voltage and Determining the Dielectric Breakdown Voltage of a Membrane Switch or Printed Electronic Device

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ASTM F 1596 : 2015 : REDLINE

Standard Test Method for Exposure of a Membrane Switch or Printed Electronic Device to Temperature and Relative Humidity

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