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)

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
15-Dec-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
06-Dec-2019
Due Date
10-Feb-2020
Completion Date
16-Dec-2019

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SLOVENSKI STANDARD
SIST EN 60068-2-64:2008/A1:2020
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
SIST EN 60068-2-64:2008/A1:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 60068-2-64:2008/A1:2020
---------------------- Page: 2 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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
---------------------- Page: 3 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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.
---------------------- Page: 4 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 5 ----------------------
SIST EN 60068-2-64:2008/A1:2020
– 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.
---------------------- Page: 6 ----------------------
SIST EN 60068-2-64:2008/A1:2020
IEC 60068-2-64:2008/AMD1:2019 – 3 –
© IEC 2019
3 Definitions
Add the following new terminological entries:
3.39
kurtosis

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:
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;
𝑥𝑥̅ is the mean value of the N values which describe the waveform.
3.40
skewness
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:
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;
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.
---------------------- Page: 7 ----------------------
SIST EN 60068-2-64:2008/A1:2020
– 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),

---------------------- Page: 8 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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
---------------------- Page: 9 ----------------------
SIST EN 60068-2-64:2008/A1:2020
– 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
SIST EN 60068-2-64:2008/A1:2020
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
SIST EN 60068-2-64:2008/A1:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 60068-2-64:2008/A1:2020
---------------------- Page: 2 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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
---------------------- Page: 3 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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.
---------------------- Page: 4 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 5 ----------------------
SIST EN 60068-2-64:2008/A1:2020
– 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.
---------------------- Page: 6 ----------------------
SIST EN 60068-2-64:2008/A1:2020
IEC 60068-2-64:2008/AMD1:2019 – 3 –
© IEC 2019
3 Definitions
Add the following new terminological entries:
3.39
kurtosis

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:
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;
𝑥𝑥̅ is the mean value of the N values which describe the waveform.
3.40
skewness
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:
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;
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.
---------------------- Page: 7 ----------------------
SIST EN 60068-2-64:2008/A1:2020
– 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),

---------------------- Page: 8 ----------------------
SIST EN 60068-2-64:2008/A1:2020
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
---------------------- Page: 9 ----------------------
SIST EN 60068-2-64:2008/A1:2020
– 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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