EN 60068-2-64:2008/A1:2019
(Amendment)Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance
Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance
Umgebungseinflüsse - Teil 2-64: Prüfverfahren - Prüfung Fh: Schwingen, Breitbandrauschen (digital geregelt) und Leitfaden
Essais d’environnement - Partie 2-64: Essais - Essai Fh: Vibrations aléatoires à large bande et guide
Okoljski preskusi - 2-64. del: Preskusi - Preskus Fh: Vibracije, naključne širokopasovne (digitalni nadzor), in vodilo - Dopolnilo A1 (IEC 60068-2-64:2008/A1:2019)
General Information
- Status
- Published
- Publication Date
- 28-Nov-2019
- Withdrawal Date
- 12-Nov-2022
- Technical Committee
- CLC/SR 104 - Environmental conditions, classification and methods of test
- Drafting Committee
- IEC/TC 104 - IEC_TC_104
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 29-Nov-2019
- Completion Date
- 29-Nov-2019
Relations
- Effective Date
- 26-Jan-2023
Overview
EN 60068-2-64:2008/A1:2019 (published by CLC/CENELEC, based on IEC 60068-2-64:2008/A1:2019) is an amendment to the broadband random vibration test method used for environmental testing of electrotechnical equipment. The amendment adds formal coverage and guidance for non‑Gaussian (high kurtosis) random vibration in addition to the traditional Gaussian broadband random vibration. Key additions include definitions, apparatus requirements, measurement practices and an informative Annex C describing methods to generate and interpret non‑Gaussian waveforms.
Key Topics and Requirements
- Scope of amendment
- Integrates non‑Gaussian (high kurtosis) vibration testing into EN 60068-2-64 procedures.
- Formalizes recording and statistical analysis requirements for non‑Gaussian signals.
- New definitions
- Kurtosis (4th moment) and skewness (3rd moment) defined with formulae and interpretation.
- Beta distribution introduced as an example probability model for waveform shaping.
- Test apparatus and control
- Shaker and amplifier systems must be capable of producing specified probability distributions and crest factor levels (higher crest factor capability often required for non‑Gaussian tests).
- Time histories must be recorded; statistical characteristics (crest factor, kurtosis, skewness, amplitude probability distribution) must be established.
- Severity and specification
- Test specifications must include standard parameters (spectrum, duration, axes) plus non‑Gaussian specifics when applicable:
- Type of non‑Gaussian test, required probability distribution or kurtosis, skewness (if applicable), required crest factor and drive signal clipping amplitude.
- Test specifications must include standard parameters (spectrum, duration, axes) plus non‑Gaussian specifics when applicable:
- Annex C guidance
- Describes three practical methods to generate non‑Gaussian waveforms:
- Amplitude modulation technique
- Phase modification technique
- Non‑uniform phase technique
- Notes that techniques are not necessarily interchangeable and time histories must be evaluated.
- Describes three practical methods to generate non‑Gaussian waveforms:
Applications and Who Uses It
- Test labs performing environmental and vibration testing for electronics and electromechanical products.
- Manufacturers and design engineers in automotive, aerospace, defence, railway and industrial equipment sectors who need to reproduce combined vibration/shock or repeated-impact conditions.
- Quality, reliability and R&D teams specifying realistic field‑use vibration environments where impacts, rattling or transport shocks are important.
- Procurement and compliance professionals specifying test severity and acceptance criteria for products.
Related Standards
- IEC/EN 60068 series (environmental testing methods) - EN 60068-2-64 is one part focused on broadband random vibration.
- Refer to the base publication EN/IEC 60068-2-64:2008 for the full Gaussian random vibration procedure; A1:2019 is the amendment adding non‑Gaussian guidance.
Keywords: EN 60068-2-64, broadband random vibration, non‑Gaussian, high kurtosis, environmental testing, vibration testing, crest factor, kurtosis, skewness, beta distribution.
Frequently Asked Questions
EN 60068-2-64:2008/A1:2019 is a amendment published by CLC. Its full title is "Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance". This standard covers: Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance
Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance
EN 60068-2-64:2008/A1:2019 is classified under the following ICS (International Classification for Standards) categories: 19.040 - Environmental testing. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 60068-2-64:2008/A1:2019 has the following relationships with other standards: It is inter standard links to EN 60068-2-64:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2020
Okoljski preskusi - 2-64. del: Preskusi - Preskus Fh: Vibracije, naključne
širokopasovne (digitalni nadzor), in vodilo - Dopolnilo A1 (IEC 60068-2-
64:2008/A1:2019)
Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random (digital
contol) and guidance (IEC 60068-2-64:2008/A1:2019)
Umgebungseinflüsse - Teil 2-64: Prüfverfahren - Prüfung Fh: Schwingen,
Breitbandrauschen und Leitfaden (IEC 60068-2-64:2008/A1:2019)
Essais d'environnement - Partie 2-64: Essais - Essai Fh: Vibrations aléatoires à large
bande et guide (IEC 60068-2-64:2008/A1:2019)
Ta slovenski standard je istoveten z: EN 60068-2-64:2008/A1:2019
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 60068-2-64:2008/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2019
ICS 19.040
English Version
Environmental testing - Part 2-64: Tests - Test Fh: Vibration,
broadband random and guidance
(IEC 60068-2-64:2008/A1:2019)
Essais d'environnement - Partie 2-64: Essais - Essai Fh: Umgebungseinflüsse - Teil 2-64: Prüfverfahren - Prüfung
Vibrations aléatoires à large bande et guide Fh: Schwingen, Breitbandrauschen (digital geregelt) und
(IEC 60068-2-64:2008/A1:2019) Leitfaden
(IEC 60068-2-64:2008/A1:2019)
This amendment A1 modifies the European Standard EN 60068-2-64:2008; it was approved by CENELEC on 2019-11-13. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60068-2-64:2008/A1:2019 E
European foreword
The text of document 104/848/FDIS, future IEC 60068-2-64/A1, prepared by IEC/TC 104
"Environmental conditions, classification and methods of test" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 60068-2-64:2008/A1:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-08-13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-11-13
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60068-2-64:2008/A1:2019 was approved by CENELEC as
a European Standard without any modification.
IEC 60068-2-64 ®
Edition 2.0 2019-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 1
AM ENDEMENT 1
Environmental testing –
Part 2-64: Tests – Test Fh: Vibration, broadband random and guidance
Essais d’environnement –
Partie 2-64: Essais – Essai Fh: Vibrations aléatoires à large bande et guide
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-7458-3
– 2 – IEC 60068-2-64:2008/AMD1:2019
© IEC 2019
FOREWORD
This amendment has been prepared by IEC technical committee 104: Environmental
conditions, classification and methods of test.
The text of this amendment is based on the following documents:
FDIS Report on voting
104/848/FDIS 104/855/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
___________
INTRODUCTION
Add, after the fourth paragraph, the following new paragraph:
The traditional general purpose broad-band random vibration test utilizes waveforms with a
Gaussian distribution of amplitudes. However, when so specified, this test procedure can also
be utilized with random vibration tests with a non-Gaussian distribution of amplitudes. Such
tests are sometimes alternatively known as high kurtosis tests.
Add, after the last paragraph, the following new paragraph:
Annex C is an informative annex giving information on non-Gaussian distribution/high kurtosis
tests.
IEC 60068-2-64:2008/AMD1:2019 – 3 –
© IEC 2019
3 Definitions
Add the following new terminological entries:
3.39
kurtosis
th
4 statistical moment, which provides a measure of the shape of an amplitude distribution
Note 1 to entry: Typically a waveform with Gaussian distribution will have a kurtosis of 3, if considered over an
infinite period.
Note 2 to entry: Kurtosis is given by:
N
kurtosis xx−.
( )
∑ i
N σ
i=1
where:
σ is the standard deviation of the N values which describe the waveform;
x are individual values representing the waveform described by N such values;
i
𝑥𝑥̅ is the mean value of the N values which describe the waveform.
3.40
skewness
rd
3 statistical moment, which provides a measure of non-symmetry of an amplitude
distribution
Note 1 to entry: Typically a waveform with Gaussian distribution will have a skewness of 0, if considered over an
infinite period.
Note 2 to entry: Skewness is given by:
N
skewness xx−.
( )
∑ i
N σ
i=1
where:
σ is the standard deviation of the N values which describe the waveform;
x are individual values representing the waveform described by N such values;
i
𝑥𝑥̅ is the mean value of the N values which describe the waveform.
3.41
beta distribution
family of continuous probability distributions defined on the interval [0, 1] parametrized by two
positive shape parameters, denoted by α and β, that appear as exponents of the random
variable and control the shape of the distribution
SEE: Figure 4.
=
=
– 4 – IEC 60068-2-64:2008/AMD1:2019
© IEC 2019
Figure 4 – Examples of the beta distribution with different α and β values
4 Requirements for test apparatus
4.1 General
Add, at the end of 4.1, the following new paragraph:
For non-Gaussian testing, the test apparatus shall be able to produce a signal with a specified
probability distribution and crest factor. Generally, non-Gaussian random vibration testing
requires shaker and amplifier systems that are designed for Gaussian random vibrations but
with increased crest factor capabilities.
4.6.2 Distribution
Add, after Figure 2, the following new paragraph:
For non-Gaussian tests, the time history shall be recorded and the statistical characteristics of
crest factor, skewness, kurtosis and amplitude probability distribution established, see
Clause C.3. If required by the test specification, additional analysis of the time history shall be
undertaken. The measurement time for kurtosis, skewness and amplitude probability
distribution should be long enough to obtain statistically acceptable results.
5 Severities
Replace, in the second paragraph, the first two sentences with the following:
Each parameter shall be specified by the relevant specification. They shall be:
Add, at the end of the second paragraph, after list item d), the following new text:
For non-Gaussian vibration testing the test severity is determined by the same parameters as
for broad-band Gaussian vibration testing but with the addition of:
– the type of non-Gaussian testing to be undertaken (see Annex C),
– the required probability distribution or kurtosis (and skewness if applicable),
IEC 60068-2-64:2008/AMD1:2019 – 5 –
© IEC 2019
– the required crest factor.
8.4.1 General
Add, at the end of 8.4.1, the following new text and Figure 5:
For non-Gaussian vibration testing, the time history shall be recorded and the kurtosis,
skewness (if applicable) and amplitude probability density shall be established as required by
the relevant specification (see also Figure 5).
Key
Kurtosis = 4,5 (see 3.39)
Skewness = 0 (see 3.40)
Figure 5 – Time history of non-Gaussian excitation –
Probability density function compared with Gaussian (normal) distribution
11 Information to be given in the relevant specification
Replace the existing list item h) with the following new list item h):
h) Crest factor* / amplitude distribution, kurtosis and skewness (if applicable)/drive signal
clipping amplitude
– 6 – IEC 60068-2-64:2008/AMD1:2019
© IEC 2019
Replace, in list item h) the clause number with "4.6.2 and 5.3"
Add, at the end of Annex B, the following new Annex C:
------
...
SLOVENSKI STANDARD
01-februar-2020
Okoljski preskusi - 2-64. del: Preskusi - Preskus Fh: Vibracije, naključne
širokopasovne (digitalni nadzor), in vodilo - Dopolnilo A1 (IEC 60068-2-
64:2008/A1:2019)
Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random (digital
contol) and guidance (IEC 60068-2-64:2008/A1:2019)
Umgebungseinflüsse - Teil 2-64: Prüfverfahren - Prüfung Fh: Schwingen,
Breitbandrauschen und Leitfaden (IEC 60068-2-64:2008/A1:2019)
Essais d'environnement - Partie 2-64: Essais - Essai Fh: Vibrations aléatoires à large
bande et guide (IEC 60068-2-64:2008/A1:2019)
Ta slovenski standard je istoveten z: EN 60068-2-64:2008/A1:2019
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 60068-2-64:2008/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2019
ICS 19.040
English Version
Environmental testing - Part 2-64: Tests - Test Fh: Vibration,
broadband random and guidance
(IEC 60068-2-64:2008/A1:2019)
Essais d'environnement - Partie 2-64: Essais - Essai Fh: Umgebungseinflüsse - Teil 2-64: Prüfverfahren - Prüfung
Vibrations aléatoires à large bande et guide Fh: Schwingen, Breitbandrauschen (digital geregelt) und
(IEC 60068-2-64:2008/A1:2019) Leitfaden
(IEC 60068-2-64:2008/A1:2019)
This amendment A1 modifies the European Standard EN 60068-2-64:2008; it was approved by CENELEC on 2019-11-13. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60068-2-64:2008/A1:2019 E
European foreword
The text of document 104/848/FDIS, future IEC 60068-2-64/A1, prepared by IEC/TC 104
"Environmental conditions, classification and methods of test" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 60068-2-64:2008/A1:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-08-13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-11-13
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60068-2-64:2008/A1:2019 was approved by CENELEC as
a European Standard without any modification.
IEC 60068-2-64 ®
Edition 2.0 2019-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 1
AM ENDEMENT 1
Environmental testing –
Part 2-64: Tests – Test Fh: Vibration, broadband random and guidance
Essais d’environnement –
Partie 2-64: Essais – Essai Fh: Vibrations aléatoires à large bande et guide
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-7458-3
– 2 – IEC 60068-2-64:2008/AMD1:2019
© IEC 2019
FOREWORD
This amendment has been prepared by IEC technical committee 104: Environmental
conditions, classification and methods of test.
The text of this amendment is based on the following documents:
FDIS Report on voting
104/848/FDIS 104/855/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
___________
INTRODUCTION
Add, after the fourth paragraph, the following new paragraph:
The traditional general purpose broad-band random vibration test utilizes waveforms with a
Gaussian distribution of amplitudes. However, when so specified, this test procedure can also
be utilized with random vibration tests with a non-Gaussian distribution of amplitudes. Such
tests are sometimes alternatively known as high kurtosis tests.
Add, after the last paragraph, the following new paragraph:
Annex C is an informative annex giving information on non-Gaussian distribution/high kurtosis
tests.
IEC 60068-2-64:2008/AMD1:2019 – 3 –
© IEC 2019
3 Definitions
Add the following new terminological entries:
3.39
kurtosis
th
4 statistical moment, which provides a measure of the shape of an amplitude distribution
Note 1 to entry: Typically a waveform with Gaussian distribution will have a kurtosis of 3, if considered over an
infinite period.
Note 2 to entry: Kurtosis is given by:
N
kurtosis xx−.
( )
∑ i
N σ
i=1
where:
σ is the standard deviation of the N values which describe the waveform;
x are individual values representing the waveform described by N such values;
i
𝑥𝑥̅ is the mean value of the N values which describe the waveform.
3.40
skewness
rd
3 statistical moment, which provides a measure of non-symmetry of an amplitude
distribution
Note 1 to entry: Typically a waveform with Gaussian distribution will have a skewness of 0, if considered over an
infinite period.
Note 2 to entry: Skewness is given by:
N
skewness xx−.
( )
∑ i
N σ
i=1
where:
σ is the standard deviation of the N values which describe the waveform;
x are individual values representing the waveform described by N such values;
i
𝑥𝑥̅ is the mean value of the N values which describe the waveform.
3.41
beta distribution
family of continuous probability distributions defined on the interval [0, 1] parametrized by two
positive shape parameters, denoted by α and β, that appear as exponents of the random
variable and control the shape of the distribution
SEE: Figure 4.
=
=
– 4 – IEC 60068-2-64:2008/AMD1:2019
© IEC 2019
Figure 4 – Examples of the beta distribution with different α and β values
4 Requirements for test apparatus
4.1 General
Add, at the end of 4.1, the following new paragraph:
For non-Gaussian testing, the test apparatus shall be able to produce a signal with a specified
probability distribution and crest factor. Generally, non-Gaussian random vibration testing
requires shaker and amplifier systems that are designed for Gaussian random vibrations but
with increased crest factor capabilities.
4.6.2 Distribution
Add, after Figure 2, the following new paragraph:
For non-Gaussian tests, the time history shall be recorded and the statistical characteristics of
crest factor, skewness, kurtosis and amplitude probability distribution established, see
Clause C.3. If required by the test specification, additional analysis of the time history shall be
undertaken. The measurement time for kurtosis, skewness and amplitude probability
distribution should be long enough to obtain statistically acceptable results.
5 Severities
Replace, in the second paragraph, the first two sentences with the following:
Each parameter shall be specified by the relevant specification. They shall be:
Add, at the end of the second paragraph, after list item d), the following new text:
For non-Gaussian vibration testing the test severity is determined by the same parameters as
for broad-band Gaussian vibration testing but with the addition of:
– the type of non-Gaussian testing to be undertaken (see Annex C),
– the required probability distribution or kurtosis (and skewness if applicable),
IEC 60068-2-64:2008/AMD1:2019 – 5 –
© IEC 2019
– the required crest factor.
8.4.1 General
Add, at the end of 8.4.1, the following new text and Figure 5:
For non-Gaussian vibration testing, the time history shall be recorded and the kurtosis,
skewness (if applicable) and amplitude probability density shall be established as required by
the relevant specification (see also Figure 5).
Key
Kurtosis = 4,5 (see 3.39)
Skewness = 0 (see 3.40)
Figure 5 – Time history of non-Gaussian excitation –
Probability density function compared with Gaussian (normal) distribution
11 Information to be given in the relevant specification
Replace the existing list item h) with the following new list item h):
h) Crest factor* / amplitude distribution, kurtosis and skewness (if applicable)/drive signal
clipping amplitude
– 6 – IEC 60068-2-64:2008/AMD1:2019
© IEC 2019
Replace, in list item h) the clause number with "4.6.2 and 5.3"
Add, at the end of Annex B, the following new Annex C:
------
...
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