ASTM F2865-11

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Designation: F2865 − 11
StandardGuide for
Classifying the Degrees of Ingression Protection Provided
by 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 F1680 Test Method for Determining Circuit Resistance of a
Membrane Switch
1.1 This guide establishes a classification system and refer-
F1689 Test Method for Determining the Insulation Resis-
ences test methods for verifying the degrees of protection
tance of a Membrane Switch
provided by a membrane switch against the following:
F2592 Test Method for Measuring the Force-Displacement
1.1.1 The ingress of dust into a membrane switch.
of a Membrane Switch
1.1.2 Ingress of water into a membrane switch, or the entry
2.2 IEC Standard:
into the finished product on which it is mounted.
1.1.3 It can be expanded to incorporate the degrees of 60529 Degrees of Protection Offered by an Electronic En-
closure
protection from other environmental contaminants (such as salt
fog) as these tests are developed either by ASTM, or existing
3. Terminology
test methods developed by other organizations are determined
to be appropriate.
3.1 Definitions of Terms Specific to This Standard:
1.1.4 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.
1.1.5 The IP rating is based on the switch construction only
4. Classification System
anddoesnotconsidertheeffectsoftheswitchbodyasasealant
4.1 The degree of protection provided by a membrane
for the enclosure.
switch is designated by the MS-IP code:
1.1.6 For ingress of dust, numerals 5 and 6, the test is
4.1.1 MSAIP6 5
carried out according to category 2 (testing at atmospheric
4.1.1.1 MS = membrane switch.
pressure).
4.1.1.2 A = If “A” is present in code then method or media
1.2 This guide references appropriate test methods for
deviates from this standard.
verifying that a membrane switch satisfies the level of protec-
4.1.1.3 IP = Standard Ingress Protection designation.
tion specified by a given classification.
4.1.1.4 1st Numeral = Dust Protection Code (see Table 1).
4.1.1.5 2nd Numeral = Water (Liquid) Protection Code (see
1.3 This guide is a modification of the classification system
Table 2).
described within IEC 60529 – Degrees of Protection Offered
4.1.2 The MSIP code comprises a series of numerals. Each
By An Electronic Enclosure.
numeral represents the level of ingress protection offered by
2. Referenced Documents the membrane switch to each contaminant. In this standard
2 when addressing only the 1st or 2nd numeral the other numeral
2.1 ASTM Standards:
is replaced with an “X” for clarity. For example, MSIP X5
F1578 Test Method for Contact Closure Cycling of a Mem-
would refer only to testing for water ingression. The “X”
brane Switch
notation is not used as a final designation. If testing is not
completeda“0”is used for that numeral (see Table 1 and
Table 2).
This guide is under the jurisdiction of ASTM Committee F01 on Electronics
4.1.3 It is intended that the classification scheme be ex-
and is the direct responsibility of Subcommittee F01.18 on Membrane Switches.
panded by the addition of further numerals to the sequence to
Current edition approved July 1, 2011. Published August 2011. DOI: 10.1520/
F2865-11.
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.
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F2865 − 11
TABLE 1 1st Numeral = Dust Protection Code
Numerals or Letters Meaning for the protection of Requirement Summary Test Equipment
0 Not tested/or no protection none N/A
1,2,3 Not applicable to membrane switches none N/A
4 Solid objects (no venting to the Internally vented only. 1.0 mm diameter test pin
locations outside the Ingress of solid objects up Force gage
enclosure) to 1.0 mm and 1N,
no entrance of the probe
5 Dust protected Ingress of dust is not IEC 60529 – Dust Chamber
totally prevented, but the No pressure added to the chamber
dust shall not penetrate in
a quantity to interfere with
the satisfactory operation
of the apparatus
6 Dust tight No Ingress of Dust IEC 60529 – Dust Chamber
Positive pressure
TABLE 2 2nd Numeral = Water (Liquid) Protection Code
Numerals or Letters Meaning for the protection of Requirement Summary Test Equipment
0 Not tested/or not protection none N/A
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
incorporate tests for other contaminants. Deviation from the resistance in the final assembly as it interacts with the
standard are declared. membrane switch’s construction.
4.1.4 The numeric designations for dust and water are based
6.2 The roughness, flatness, and existence of residues on the
on those classified under IEC 60529.
substrate surface to which the membrane switch is mounted.
5. Significance and Use 6.3 The length of time between the lamination of the
membrane switch layers together to make the switch.
5.1 Ingression protection classifications are widely used by
manufacturers for specifying the level of protection offered by 6.4 The length of time between the lamination of the
membrane switch to the substrate and the performance on the
electronic enclosures.
test.
5.2 An example of such a classification scheme is IEC
6.5 The temperature at which the test is being conducted.
60529. Membrane switch manufacturers are often asked to
meet these standards, however the test methods specified
7. Conditioning
within these standards do not address considerations specific to
membrane switches.
7.1 Unless otherwise specified in a relevant product stan-
dard, the test samples for each test shall be in a clean and new
5.3 A single classification scheme such as this is an impor-
condition.
tant means of integrating the various standards that relate to
ingression protection specifically for membrane switches.
7.2 It is preferred that the switch is mounted on a rigid
transparent backer to better observe the ingression of dust or
5.4 Ingression testing can be useful to identify design
waterintotheswitch,howeverwhenrequiredanddeclared,the
deficiencies.
partsshallbemountedontheenclosureinthemannerstatedby
6. Interferences
the manufacturer.
6.1 The membrane switch should not be tested in its
8. Test Method for Ingress of Dust into a Membrane
un-mounted state. The switch sample or a representative
Switch
coupon of the switch should be mounted onto the final end-use
enclosure, panel, bezel, or agreed upon material. 8.1 Apparatus:
6.1.1 Discussion –Assembly Spe
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