SIST EN 61260-2:2016
(Main)Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-evaluation tests (IEC 61260-2:2016)
Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-evaluation tests (IEC 61260-2:2016)
1.1 This part of IEC 61260 provides details of the tests necessary to verify conformance to
all mandatory specifications given in IEC 61260-1:2014 for octave-band and fractional-octaveband
filters.
1.2 Tests and test methods are applicable to class 1 and class 2 bandpass filters. The aim
is to ensure that all testing laboratories use consistent methods to perform pattern-evaluation
tests
Elektroakustik - Bandfilter für Oktaven und Bruchteile von Oktaven - Teil 2: Baumusterprüfung
Electroacoustique - Filtres de bande d'octave et de bande d'une fraction d'octave - Partie 2: Essais d'évaluation d'un modèle
L'IEC 61260-2:2016 décrit les essais nécessaires pour vérifier la conformité à l'ensemble des spécifications obligatoires données dans l'IEC 61260-1:2014 concernant les filtres de bande d'octave et les filtres de bande d'une fraction d'octave. Cette première édition de l'IEC 61260-2 (conjointement avec l'IEC 61260-1:2014 et l'IEC 61260-3:2016) annule et remplace la première édition de l'IEC 61260 parue en 1995 et son Amendement 1 paru en 2001. Cette édition constitue une révision technique.
Elektroakustika - Oktavni in frakcijski oktavni filtri - 2. del: Preskusi z ocenjevanjem vzorcev (IEC 61260-2:2016)
1.1 Ta del standarda IEC 61260 navaja podrobnosti glede preskusov, potrebnih za preverjanje skladnosti z vsemi obveznimi specifikacijami, podanimi v standardu IEC 61260-1:2014, za oktavne in frakcijske oktavne filtre.
1.2 Preskusi in preskusne metode se uporabljajo za pasovne filtre razreda 1 in 2. Cilj je zagotoviti uporabo skladnih metod pri preskušanju tipov v vseh preskuševalnih laboratorijih.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61260-2:2016
01-september-2016
1DGRPHãþD
SIST EN 61260:1998
SIST EN 61260:1998/A1:2006
Elektroakustika - Oktavni in frakcijski oktavni filtri - 2. del: Preskusi z
ocenjevanjem vzorcev (IEC 61260-2:2016)
Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-
evaluation tests (IEC 61260-2:2016)
Electroacoustique - Filtres de bande d'octave et de bande d'une fraction d'octave - Partie
2: Essais d'évaluation d'un modèle
Ta slovenski standard je istoveten z: EN 61260-2:2016
ICS:
17.140.50 Elektroakustika Electroacoustics
SIST EN 61260-2:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 61260-2:2016
---------------------- Page: 2 ----------------------
SIST EN 61260-2:2016
EUROPEAN STANDARD EN 61260-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2016
ICS 17.140.50 Supersedes EN 61260:1995 (partially)
English Version
Electroacoustics - Octave-band and fractional-octave-band filters
- Part 2: Pattern-evaluation tests
(IEC 61260-2:2016)
Electroacoustique - Filtres de bande d'octave et de bande Elektroakustik - Bandfilter für Oktaven und Bruchteile von
d'une fraction d'octave - Partie 2: Essais d'évaluation d'un Oktaven - Teil 2: Baumusterprüfung
modèle (IEC 61260-2:2016)
(IEC 61260-2:2016)
This European Standard was approved by CENELEC on 2016-04-27. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61260-2:2016 E
---------------------- Page: 3 ----------------------
SIST EN 61260-2:2016
EN 61260-2:2016
European foreword
The text of document 29/845/CDV, future edition 1 of IEC 61260-2, prepared by IEC TC 29,
Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61260-2:2016.
The following dates are fixed:
(dop) 2017-01-27
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2019-04-27
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61260:1995.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61260-2:2016 was approved by CENELEC as a European
Standard without any modification.
2
---------------------- Page: 4 ----------------------
SIST EN 61260-2:2016
EN 61260-2:2016
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) -- Part EN 61000-4-2 2009
4-2: Testing and measurement techniques -
Electrostatic discharge immunity test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) -- Part EN 61000-4-3 2006
4-3: Testing and measurement techniques -
Radiated, radio-frequency, electromagnetic
field immunity test
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) -- Part EN 61000-4-6 2014
4-6: Testing and measurement techniques -
Immunity to conducted disturbances,
induced by radio-frequency fields
IEC 61000-6-1 - Electromagnetic compatibility (EMC) -- Part EN 61000-6-1 -
6-1: Generic standards - Immunity for
residential, commercial and light-industrial
environments
IEC 61000-6-2 2005 Electromagnetic compatibility (EMC) -- Part EN 61000-6-2 2005
6-2: Generic standards - Immunity for
industrial environments
- - + corrigendum Sep. 2005
IEC 61000-6-3 - Electromagnetic compatibility (EMC) -- Part EN 61000-6-3 -
6-3: Generic standards - Emission standard
for residential, commercial and light-
industrial environments
IEC 61260-1 2014 Electroacoustics - Octave-band and EN 61260-1 2014
fractional-octave-band filters -- Part 1:
Specifications
IEC 61672-1 - Electroacoustics - Sound level meters -- Part EN 61672-1 -
1: Specifications
ISO/IEC Guide 98-3 - Uncertainty of measurement - Part 3: Guide - -
to the expression of uncertainty in
measurement (GUM:1995)
ISO/IEC Guide 98-4 - Uncertainty of measurement_- Part_4: Role - -
of measurement uncertainty in conformity
assessment
ISO/IEC Guide 99 - International vocabulary of metrology - Basic - -
and general concepts and associated terms
(VIM)
CISPR 16-1-1 - Specification for radio disturbance and - -
immunity measuring apparatus and methods
- Part 1-1: Radio disturbance and immunity
measuring apparatus - Measuring appartus
CISPR 16-1-2 - Specification for radio disturbance and EN 55016-1-2 -
immunity measuring apparatus and methods
- Part 1-2: Radio disturbance and immunity
measuring apparatus - Coupling devices for
conducted disturbance measurements
3
---------------------- Page: 5 ----------------------
SIST EN 61260-2:2016
EN 61260-2:2016
CISPR 16-2-1 - Specification for radio disturbance and EN 55016-2-1 -
immunity measuring apparatus and methods
- Part 2-1: Methods of measurement of
disturbances and immunity - Conducted
disturbance measurements
CISPR 16-2-3 - Specification for radio disturbance and EN 55016-2-3 -
immunity measuring apparatus and methods
-- Part 2-3: Methods of measurement of
disturbances and immunity - Radiated
disturbance measurements
CISPR 22 - Information technology equipment - Radio EN 55022 -
disturbance characteristics - Limits and
methods of measurement
4
---------------------- Page: 6 ----------------------
SIST EN 61260-2:2016
IEC 61260-2
®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Octave-band and fractional-octave-band filters –
Part 2: Pattern-evaluation tests
Électroacoustique – Filtres de bande d'octave et de bande d'une fraction
d'octave –
Partie 2: Essais d'évaluation d'un modèle
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8322-3245-3
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: 7 ----------------------
SIST EN 61260-2:2016
– 2 – IEC 61260-2:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Submission for testing . 7
5 Marking of the filter and information in the instruction manual . 7
6 Mandatory facilities and general requirements . 8
6.1 General . 8
6.2 Test instruments . 9
7 Tests at reference conditions . 10
7.1 General . 10
7.2 Relative attenuation, effective bandwidth deviation and summation of output
signals . 10
7.2.1 General . 10
7.2.2 Relative attenuation . 11
7.2.3 Effective bandwidth deviation . 11
7.2.4 Summation of output signals . 11
7.3 Linear operating range, measurement range, level range control and
overload indicator . 12
7.4 Time-invariant operation . 13
7.5 Power supply check . 13
8 Electromagnetic and electrostatic compatibility requirements . 14
8.1 General . 14
8.2 Influence of electrostatic discharges . 14
8.3 Influence of AC power-frequency and radio-frequency fields . 14
8.3.1 Input signal . 14
8.3.2 Range setting . 14
8.3.3 AC power-frequency tests . 14
8.3.4 Radio-frequency tests . 15
8.4 Radio-frequency emissions and public power supply disturbances . 16
9 Sensitivity to ambient air temperature and relative humidity . 17
10 Pattern-evaluation report . 17
Annex A (informative) Uncertainty related to test by sinusoidal sweeps . 19
A.1 General . 19
A.2 Digitally generated signal . 19
A.3 Test signal from a signal generator . 20
A.4 Comparing measurements . 21
Annex B (informative) Test of time invariant operation with the use of an exponential
sweep – Example . 22
B.1 General . 22
B.2 Example. 22
Bibliography . 24
---------------------- Page: 8 ----------------------
SIST EN 61260-2:2016
IEC 61260-2:2016 © IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS – OCTAVE-BAND
AND FRACTIONAL-OCTAVE-BAND FILTERS –
Part 2: Pattern-evaluation tests
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61260-2 has been prepared by IEC technical committee 29:
Electroacoustics.
This first edition of IEC 61260-2 (together with IEC 61260-1:2014 and IEC 61260-3:2016),
cancels and replaces the first edition of IEC 61260 published in 1995 and its Amendment 1
published in 2001. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to IEC 61260.
a) The single document in the first edition of IEC 61260:1995 is now separated into three
parts of the IEC 61260 series covering: specifications, pattern-evaluation tests and
periodic tests.
b) IEC 61260:1995 specified three performance categories: class 0, 1 and 2 while the
IEC 61260 series specifies requirements for class 1 and 2.
c) In IEC 61260:1995, the design goals for the specification can be based on base-2 or base-
10 design. In the IEC 61260 series only base-10 is specified.
---------------------- Page: 9 ----------------------
SIST EN 61260-2:2016
– 4 – IEC 61260-2:2016 © IEC 2016
d) The reference environmental conditions have been changed from 20 °C/65 % RH to
23 °C/50 % RH;
e) IEC 61260:1995 specified tolerance limits without considering the uncertainty of
measurement for verification of the specifications. The IEC 61260 series specifies
acceptance limits for the observed values and maximum-permitted uncertainty of
measurements for laboratories testing conformance to specifications in the standard.
The text of this standard is based on the following documents:
CDV Report on voting
29/845/CDV 29/881A/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts of the IEC 61260 series, published under the general title
Electroacoustics – Octave-band and fractional-octave-band filters can be found on the IEC
website.
The committee has decided that the contents of this 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.
---------------------- Page: 10 ----------------------
SIST EN 61260-2:2016
IEC 61260-2:2016 © IEC 2016 – 5 –
INTRODUCTION
IEC 61260:1995 and IEC 61260:1995/AMD 1:2001 are now separated into the following three
parts of IEC 61260 series:
• Part 1: Specifications
• Part 2: Pattern-evaluation tests
• Part 3: Periodic tests
For assessments of conformance to performance specifications, IEC 61260-1 uses different
criteria than were used for the IEC 61260:1995 edition.
IEC 61260:1995 did not provide any requirements or recommendations to account for the
uncertainty of measurement in assessments of conformance to specifications. This absence
of requirements or recommendations to account for uncertainty of measurement created
ambiguity in determinations of conformance to specifications for situations where a measured
deviation from a design goal was close to the limit of the allowed deviation. If conformance
was determined based on whether a measured deviation did or did not exceed the limits, the
end-user of the octave-band and fractional-octave-band filters incurred the risk that the true
deviation from a design goal exceeded the limits.
To remove this ambiguity, IEC Technical Committee 29, at its meeting in 1996, adopted a
policy to account for measurement uncertainty in assessments of conformance in International
Standards that it prepares.
This edition of IEC 61260-2 uses an amended criterion for assessing conformance to a
specification. Conformance is demonstrated when (a) measured deviations from design goals
do not exceed the applicable acceptance limits and (b) the uncertainty of measurement does
not exceed the corresponding maximum-permitted uncertainty. Acceptance limits are
analogous to the tolerance limits allowances for design and manufacturing implied in the
IEC 61260:1995.
Actual and maximum-permitted uncertainties of measurement are determined for a coverage
probability of 95 %. Unless more specific information is available, the evaluation of the
contribution of a specific filter or filter set to a total measurement uncertainty can be based on
the acceptance limits and maximum-permitted uncertainties specified in this standard.
---------------------- Page: 11 ----------------------
SIST EN 61260-2:2016
– 6 – IEC 61260-2:2016 © IEC 2016
ELECTROACOUSTICS – OCTAVE-BAND
AND FRACTIONAL-OCTAVE-BAND FILTERS –
Part 2: Pattern-evaluation tests
1 Scope
1.1 This part of IEC 61260 provides details of the tests necessary to verify conformance to
all mandatory specifications given in IEC 61260-1:2014 for octave-band and fractional-octave-
band filters.
1.2 Tests and test methods are applicable to class 1 and class 2 bandpass filters. The aim
is to ensure that all testing laboratories use consistent methods to perform pattern-evaluation
tests.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-6-1, Electromagnetic compatibility (EMC) – Part 6-1: Generic standards –
Immunity for residential, commercial and light-industrial environments
IEC 61000-6-2:2005, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity for industrial environments
IEC 61000-6-3, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards –
Emission standard for residential, commercial and light-industrial environments
IEC 61260-1:2014, Electroacoustics – Octave-band and fractional-octave-band filters – Part 1:
Specifications
IEC 61672-1, Electroacoustics – Sound level meters – Part 1: Specifications
CISPR 16-1-1, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring
apparatus
---------------------- Page: 12 ----------------------
SIST EN 61260-2:2016
IEC 61260-2:2016 © IEC 2016 – 7 –
CISPR 16-1-2, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1-2: Radio disturbance and immunity measuring apparatus – Coupling devices
for conducted disturbance measurements
CISPR 16-2-1, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
CISPR 16-2-3, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2-3: Methods of measurement of disturbances and immunity – Radiated
disturbance measurements
CISPR 22:2008, Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement
ISO/IEC Guide 98-3, Uncertainty of measurement – Part 3: Guide to the expression of
uncertainty in measurement (GUM:1995)
ISO/IEC Guide 98-4, Uncertainty of measurement – Part 4: Role of measurement uncertainty
in conformity assessment
ISO/IEC Guide 99, International vocabulary of metrology – Basic and general concepts and
associated terms (VIM)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61260-1:2014,
IEC 61000-4-2, IEC 61000-4-3, IEC 61000-6-1, IEC 61000-6-2, and IEC 61000-6-3,
ISO/IEC Guide 98-3, ISO/IEC Guide 98-4 and ISO/IEC Guide 99 apply.
4 Submission for testing
4.1 At least three specimens of the same pattern of bandpass filter shall be submitted for
pattern-evaluation testing. As a minimum, the testing laboratory shall select two of the
specimens for testing. At least one of the two specimens shall then be tested fully according
to the procedures of this standard. The testing laboratory shall decide whether the full tests
shall also be performed on the second specimen or whether limited testing is adequate to
approve the pattern.
4.2 An instruction manual and all items or accessories that are identified in the instruction
manual as integral components for the normal mode of operation shall be submitted along
with the filters.
4.3 If the manufacturer of the filters supplies devices that are to be connected to the
bandpass filter by cables for a typical mode of operation for the filter, then the devices and
cables shall be submitted with the filter.
5 Marking of the filter and information in the instruction manual
5.1 It shall be verified that the filter is marked according to the requirements of
IEC 61260-1:2014.
5.2 It shall be verified that the instruction manual contains all the information that is
required by IEC 61260-1:2014 as relevant to the facilities provided by the filter.
---------------------- Page: 13 ----------------------
SIST EN 61260-2:2016
– 8 – IEC 61260-2:2016 © IEC 2016
5.3 If the filter does not conform to the requirements of 5.1 and 5.2, no pattern-evaluation
tests shall be performed.
5.4 After completion of all tests, the information shall be reviewed to ensure that it is
correct and that no applicable acceptance limits are exceeded.
6 Mandatory facilities and general requirements
6.1 General
6.1.1 No test specified in this part of IEC 61260 series shall be omitted unless the
bandpass filter does not possess the feature described for the test. When the design of a
fractional-octave-band filter, which has been pattern approved, is changed and a new pattern
approval is requested, then – at the discretion of the testing laboratory – it is not necessary to
repeat those tests for performance characteristics that are not affected by the design change.
6.1.2 If the filter does not possess the mandatory features listed in IEC 61260-1:2014,
such as overload indicator or means to check that the power supply is adequate for battery
powered instruments which contain the filter, the filter does not conform to the specifications
of IEC 61260-1:2014, and no pattern-evaluation tests shall be performed.
6.1.3 For all pattern-evaluation tests, the configuration of the filter shall be as specified in
the instruction manual for one of the normal modes of operation, including required
accessories. All configurations of the filter that are stated in the instruction manual as
conforming to the requirements of IEC 61260-1:2014 shall be tested.
6.1.4 If the instruction manual states that the filter conforms to the specifications of
IEC 61260-1:2014 with optional facilities installed, the combination with the optional facilities
installed shall also be tested to verify conformance to the relevant specifications.
6.1.5 If the filter is enclosed in an instrument containing a level detector and a display
device for displaying the level of the filtered signal with a resolution of at least 0,1 dB, the
displayed value from this display device shall be used for testing, if appropriate. If an
electrical output is provided corresponding to the displayed value and the testing laboratory
intends to utilize the electrical output instead of the display device, the laboratory shall verify
that changes in the levels of applied electrical input signals produce corresponding changes
in the signal levels indicated on the display device and at the electrical output that are in
accordance with the specifications of IEC 61260-1:2014.
6.1.6 For bandpass filters that are designed to operate with measuring devices that comply
with the requirements for sound level meters as specified in IEC 61672-1, the display
indicator of this device shall be used to measure the level of the output signal from the filter
set.
6.1.7 For filter sets with digital readout devices, or with output that is available in a
manufacturer-specified digi
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.