ASTM F2865-13(2021)

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: F2865 − 13 (Reapproved 2021)
Standard Guide for
Classifying the Degrees of Ingress of Dust and Water into a
Membrane Switch
This standard is issued under the fixed designation F2865; 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 tance of a Membrane Switch
F2592 Test Method for Measuring the Force-Displacement
1.1 This guide establishes a classification system and refer-
of a Membrane Switch
ences test methods for verifying the degrees of:
2.2 IEC Standard:
1.1.1 The ingress of dust into the internal layers of a
60529 Degrees of Protection Provided by Enclosures
membrane switch.
1.1.2 Ingressofwaterintotheinternallayersofamembrane
3. Terminology
switch.
3.1 Definitions of Terms Specific to This Standard:
1.1.3 Where external test methods are referenced, this guide
3.1.1 membrane switch, n—a momentary switching device
specifies the special conditions that shall be considered in
in which at least one contact is on, or made of, a flexible
applying these tests to membrane switches and how the results
substrate.
are interpreted.
1.2 This guide references test methods that can be used to
4. Classification System
establish the ingress classification of a membrane switch.
4.1 The ingress classification of a membrane switch is
1.3 This guide utilizes the test methods and reporting
designated by the MSIP code:
structure of IEC 60529 – (Degrees of Protection Provided by
4.1.1 MSIP 6 5 A
Enclosures) modified for membrane switches.
4.1.1.1 MSIP = Membrane Switch Ingress classification.
4.1.1.2 1st Numeral = Dust Protection Code (see Table 1).
1.4 This international standard was developed in accor-
4.1.1.3 2nd Numeral = Water (Liquid) Protection Code (see
dance with internationally recognized principles on standard-
Table 2).
ization established in the Decision on Principles for the
4.1.1.4 A = If “A” is present then method or media deviates
Development of International Standards, Guides and Recom-
from this guide and is reported.
mendations issued by the World Trade Organization Technical
4.1.2 The MSIP code comprises a series of numerals. Each
Barriers to Trade (TBT) Committee.
numeral represents the level of ingress offered by the mem-
2. Referenced Documents brane switch to each contaminant. In this guide when address-
2 ing only the 1st or 2nd numeral the other numeral is replaced
2.1 ASTM Standards:
with an “X” for clarity. For example, MSIP X5 refers only to
F1578 Test Method for Contact Closure Cycling of a Mem-
testing for water ingression. The “X” notation is not used as a
brane Switch
final designation. If testing is not completeda“0”is used for
F1595 Practice forViewing Conditions forVisual Inspection
that numeral (see Table 1 and Table 2).
of Membrane Switches
4.1.3 The numeric designations for dust and water are based
F1680 Test Method for Determining Circuit Resistance of a
on those classified under IEC 60529.
Membrane Switch
F1689 Test Method for Determining the Insulation Resis-
5. Significance and Use
5.1 Ingression protection classifications are widely used by
manufacturers for specifying the level of protection offered by
This guide is under the jurisdiction of ASTM Committee F01 on Electronics
enclosures.
and is the direct responsibility of Subcommittee F01.18 on Printed Electronics.
Current edition approved March 1, 2021. Published March 2021. Originally
5.2 An example of such a classification scheme is IEC
approved in 2011. Last previous edition approved in 2013 as F2865-13. DOI:
60529. Membrane switch manufacturers are often asked to
10.1520/F2865-13R21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from International Electrotechnical Commission (IEC), 3, rue de
the ASTM website. Varembé, P.O. Box 131, CH-1211 Geneva 20, Switzerland, http://www.iec.ch.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2865 − 13 (2021)
TABLE 1 1st Numeral = Dust Protection Code
Numerals or Letters Degree of Ingress Requirement Summary Test Equipment
0 Not tested or no ingress none N/A
prevention demonstrated
A
1,2,3,4 Not applicable to membrane none N/A
switches
5 Dust protected Ingress of dust is not totally prevented. IEC 60529 – Dust Chamber
The switch operates as declared and Category2–Nopressure difference created in the
the post-test circuit resistance change is chamber
less than +30 % of pre-test, and below
the maximum circuit resistance as
specified by the manufacturer.
6 Dust tight No Ingress of Dust in the internal switch IEC 60529 – Dust Chamber
cavities. The switch operates as de- Category2–Nopressure difference created in the
clared and the post-test circuit resis- test chamber
tance change is less than +30 % of pre-
test, and below the maximum circuit
resistance as specified by the manufac-
turer.
A
IP codes 1,2,3 and 4 are not applicable to membrane switches because they indicate a level of protection for objects of 50 mm, 12 mm, 2.5 mm and 1.0 mm diameter
respectively.
TABLE 2 2nd Numeral = Water (Liquid) Protection Code
Numerals or Letters Degree of Ingress Test Equipment
0 Not tested or no ingress prevention N/A
demonstrated
1 Vertically dripping IEC 60529 – Drip Box
2 Dripping (15 deg tilted) IEC 60529 – Drip Box
3 Spraying IEC 60529 – Oscillating Tube or Spray
Nozzle
4 Splashing IEC 60529 – Oscillating Tube or Spray
Nozzle
5 Jetting IEC 60529 – Test Nozzle with 6.3 mm
nozzle
6 Powerful Jetting IEC 60529 – Test Nozzle with 12.5 mm
nozzle
7 Temporary immersion IEC 60529 – Complete immersion in water
8 Continuous immersion IEC 60529 – Complete immersion in water
meet these standards, however the test methods specified 7.2 The testing backer must be a rigid transparent backer to
within these standards do not address considerations specific to better observe the ingression of dust or water into the switch.
membrane switches. Testing backer with geometries other than flat shall be re-
ported.
5.3 The MSIPclassification system considers the membrane
switch separately from the testing and IP codes used for
8. Test Method for Ingress of Dust into a Membrane
classifying the enclosure when subject to similar test condi-
Switch
tions.
8.1 Apparatus:
5.4 Ingression testing can be useful to identify design
8.1.1 Dust Chamber: Reference IEC 60529 Section 13.4.
deficiencies.
8.1.2 Dust Media:
8.1.2.1 For MSIP5X and MSIP6X : Reference IEC 60529
6. Interferences
Section 13.4.
6.1 The membrane switch shall be tested in a mounted state
8.1.2.2 MSIP5XA and MSIP6XA: Media to be specified.
specified in thi
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