ASTM F1595-00(2005)
(Practice)Standard Practice for Viewing Conditions for Visual Inspection of Membrane Switches
Standard Practice for Viewing Conditions for Visual Inspection of Membrane Switches
SIGNIFICANCE AND USE
This practice is designed to enable all manufacturers and users of membrane switches to perform visual inspections under uniform conditions. The aim is to eliminate key variables in the inspection procedures so specimens can be viewed more objectively.
Viewing specimens under these conditions could reveal cosmetic defects in the specimen. Many of these defects or flaws are due to variables in the raw materials or the manufacturing process. These cosmetic flaws or defects do not necessarily mean that the specimen is defective. The determination of whether a specimen is acceptable or defective varies with the application and the needs of the user. Therefore, customer and vendor must agree on acceptable quality standards prior to manufacturing.
This practice does not establish standards for acceptability of specimens, only how they must be viewed (inspected).
This practice is not intended to be used for color matching purposes. Color matching must be performed under more precise lighting conditions outside the scope of this practice.
SCOPE
1.1 This practice covers procedures for performing visual inspection of membrane switches. This includes visual inspection of overlays and circuitry.
1.2 This practice defines lighting parameters, distance from eye to specimen, viewing angle, and the viewing time allowed for a specific size specimen.
1.3 This practice is only designed for visual inspection of aesthetic qualities of membrane switches. It is not intended for color matching or gloss measurement.
1.4 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.
General Information
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F1595–00(Reapproved2005)
Standard Practice for
Viewing Conditions for Visual Inspection of Membrane
Switches
This standard is issued under the fixed designation F1595; 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 2.1.6 membrane switch—a momentary switching device in
which at least one contact is on, or made of, a flexible
1.1 This practice covers procedures for performing visual
substrate.
inspection of membrane switches. This includes visual inspec-
2.1.7 overlay—outer layer of a membrane switch on which
tion of overlays and circuitry.
the graphics are printed.
1.2 This practice defines lighting parameters, distance from
2.1.7.1 Discussion—Not all membrane switches have an
eye to specimen, viewing angle, and the viewing time allowed
overlay.
for a specific size specimen.
2.1.8 viewing angle—the angle between the line of sight of
1.3 This practice is only designed for visual inspection of
the observer and the surface of the specimen.
aesthetic qualities of membrane switches. It is not intended for
2.1.9 window areas—any area of a membrane switch
color matching or gloss measurement.
through which a display, light, lamp, or other graphics, are
1.4 This standard does not purport to address all of the
viewed.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3. Significance and Use
priate safety and health practices and determine the applica-
3.1 Thispracticeisdesignedtoenableallmanufacturersand
bility of regulatory limitations prior to use.
users of membrane switches to perform visual inspections
2. Terminology under uniform conditions.The aim is to eliminate key variables
in the inspection procedures so specimens can be viewed more
2.1 Definitions:
objectively.
2.1.1 aesthetic qualities—these relate to the cosmetic ap-
3.2 Viewing specimens under these conditions could reveal
pearance of the membrane switch and include such character-
cosmetic defects in the specimen. Many of these defects or
istics as printing quality, uniformity of finish, material attri-
flaws are due to variables in the raw materials or the manu-
butes, and mechanical integrity.
facturing process. These cosmetic flaws or defects do not
2.1.1.1 Discussion—These are often described by such
necessarily mean that the specimen is defective. The determi-
terms as scratches, bubbles, dents, dings, bumps, blurs, smears,
nation of whether a specimen is acceptable or defective varies
voids, pinholes, etc.These are highly subjective terms that defy
with the application and the needs of the user. Therefore,
precise definition but which are nonetheless identifiable and
customer and vendor must agree on acceptable quality stan-
measurable.
dards prior to manufacturing.
2.1.2 color matching—procedure by which a color is com-
3.3 This practice does not establish standards for acceptabil-
pared to a standard to determine if the two are visually
ity of specimens, only how they must be viewed (inspected).
indifferentiable under specified lighting conditions.
3.4 This practice is not intended to be used for color
2.1.3 continuous scanning motion—viewing technique
matching purposes. Color matching mus
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.