SIST EN 61300-1:2011

Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 1: General and guidance (IEC 61300-1:2011)

This part of IEC 61300 contains a series of environmental test and measurement procedures and, in some cases, preferred severities designed to assess the ability of fibre optic interconnecting devices and passive components to perform under expected service conditions. Although the severities are primarily intended for land-based communications, the procedures may be used for other applications. The object of this standard is to provide uniform and reproducible environmental test procedures and measurement procedures, for those preparing specifications for fibre optic interconnecting devices and passive components. These test and measurement procedures are designed to provide information on the following properties of components and equipment, such as connectors, splices, switches, attenuators, etc.: a) ability to operate within specified limits of temperature, pressure, humidity, mechanical stress or other environmental conditions and certain combinations of these conditions; b) ability to withstand storage and transport; c) ability to meet the specified levels of optical performance. This standard should be used in combination with the relevant specification which will define the tests to be used, the required degree of severity for each of them, their sequence, if relevant, and the permissible performance limits. In the event of conflict between this basic standard and the relevant specification, the latter will take precedence.

Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und Messverfahren - Teil 1: Allgemeines und Leitfaden (IEC 61300-1:2011)

Dispositifs d'interconnexion et composants passifs à fibres optiques - Procédures fondamentales d'essais et de mesures - Partie 1: Généralités et lignes directrices (CEI 61300-1:2011)

La CEI 61300-1:2011 contient une série de méthodes d'essai et de mesure environnementales et, dans certains cas, les sévérités préférentielles pour évaluer la capacité des dispositifs d'interconnexion et composants passifs à fibres optiques à fonctionner dans des conditions de service prévues. Même si les sévérités sont d'abord destinées aux communications terrestres, les méthodes peuvent être utilisées pour d'autres applications. L'objet de la présente norme est de fournir des méthodes d'essai environnementales et de mesure uniformes et reproductibles aux personnes en charge de la rédaction de spécifications concernant les dispositifs d'interconnexion et les composants passifs à fibres optiques. Les modifications par rapport à l'édition précédente consistent en une reconsidération des termes et définitions et des conditions d'injection en multimode.

Optični spojni elementi in pasivne komponente - Postopki osnovnega preskušanja in merjenja - 1. del: Splošno in smernice (IEC 61300-1:2011)

Ta del IEC 61300 vsebuje serijo okoljskih preskusov in postopkov merjenja ter, v nekaterih primerih, prednostno natančnost, zasnovano za oceno sposobnosti optičnih spojnih elementov in pasivnih komponent za delovanje v pričakovanih pogojih delovanja. Čeprav je natančnost predvsem namenjena komunikacijam na kopnem, je postopke mogoče uporabiti za druge uporabe. Cilj tega standarda je zagotoviti enotne in ponovljive postopke okoljskih preskusov in postopke merjenja za vse, ki pripravljajo specifikacije za optične spojne elemente in pasivne komponente. Ti postopki preskušanja in merjenja so zasnovani, da zagotovijo podatke o naslednjih lastnostih komponent in opreme, kot so konektorji, spoji, stikala, atenuatorji itd.: a) sposobnost obratovanja v nekaterih omejitvah glede temperature, tlaka, vlažnosti, mehanskega stresa ali drugih okoljskih pogojev in nekaterih kombinacij teh pogojev; b) odpornosti proti skladiščenju in prevozu; c) sposobnosti za izpolnjevanje opredeljenih ravni optične zmogljivosti. Ta standard se uporablja v kombinaciji z ustrezno specifikacijo, ki opredeli preskuse, ki jih je treba uporabiti, zahtevano stopnjo natančnosti za vsakega od njih, njihovo zaporedje, če je pomembno, in dovoljene omejitve delovanja. Pri navzkrižju med tem osnovnim standardom in ustrezno specifikacijo ima prednost slednja.

General Information

• Status: Withdrawn
• Publication Date: 29-May-2011
• Withdrawal Date: 11-Dec-2017
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: MOC - Mobile Communications
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 12-Dec-2017
• Due Date: 04-Jan-2018
• Completion Date: 12-Dec-2017
• Ref Project: EN 61300-1:2011 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 1: General and guidance

Relations

• Replaced By: SIST EN 61300-1:2017 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 1: General and guidance (IEC 61300-1:2016)
• Effective Date: 13-Dec-2016
• Revised: SIST EN 61300-1:2004 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures -- Part 1: General and guidance
• Effective Date: 01-May-2012
• Replaces: SIST EN 61300-1:2004 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures -- Part 1: General and guidance
• Effective Date: 29-Jan-2023
• Replaces: SIST EN 61300-1:2004 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures -- Part 1: General and guidance
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61300-1:2011
01-julij-2011
2SWLþQLVSRMQLHOHPHQWLLQSDVLYQHNRPSRQHQWH3RVWRSNLRVQRYQHJDSUHVNXãDQMD
LQPHUMHQMDGHO6SORãQRLQVPHUQLFH,(&
Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 1: General and guidance (IEC 61300-1:2011)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und
Messverfahren - Teil 1: Allgemeines und Leitfaden (IEC 61300-1:2011)
Dispositifs d'interconnexion et composants passifs à fibres optiques - Procédures
fondamentales d'essais et de mesures - Partie 1: Généralités et lignes directrices (CEI
61300-1:2011)
Ta slovenski standard je istoveten z: EN 61300-1:2011
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN 61300-1:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61300-1:2011

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SIST EN 61300-1:2011

EUROPEAN STANDARD
EN 61300-1

NORME EUROPÉENNE
May 2011
EUROPÄISCHE NORM

ICS 33.180.20 Supersedes EN 61300-1:2003


English version


Fibre optic interconnecting devices and passive components -
Basic test and measurement procedures -
Part 1: General and guidance
(IEC 61300-1:2011)


Dispositifs d'interconnexion et composants Lichtwellenleiter -
passifs à fibres optiques - Verbindungselemente und passive
Procédures fondamentales d'essais et de Bauteile -
mesures - Grundlegende Prüf- und Messverfahren -
Partie 1: Généralités et lignes directrices Teil 1: Allgemeines und Leitfaden
(CEI 61300-1:2011) (IEC 61300-1:2011)




This European Standard was approved by CENELEC on 2011-04-27. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61300-1:2011 E

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SIST EN 61300-1:2011
EN 61300-1:2011 - 2 -
Foreword
The text of document 86B/3112/FDIS, future edition 3 of IEC 61300-1, prepared by SC 86B, Fibre optic
interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 61300-1 on 2011-04-27.
This European Standard supersedes EN 61300-1:2003.
The changes with respect to EN 61300-1:2003 are to reconsider the terms and definitions and multimode
launch conditions.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-01-27
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-04-27
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61300-1:2011 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60068-2-1 NOTE  Harmonized as EN 60068-2-1.
IEC 61315 NOTE  Harmonized as EN 61315.
IEC 62614 NOTE  Harmonized as EN 62614.
ISO 4288 NOTE  Harmonized as EN ISO 4288.
__________

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SIST EN 61300-1:2011
- 3 - EN 61300-1:2011
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60050-731 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 731: Optical fibre communication


IEC 60617 - Standard data element types with associated - -
classification scheme for electric components -
Part 4: IEC reference collection fo standard
data element types and component classes


IEC 60825-1 - Safety of laser products - EN 60825-1
Part 1: Equipment classification and
requirements


IEC 60825-2 - Safety of laser products - EN 60825-2 -
Part 2: Safety of optical fibre communication
systems (OFCS)


IEC 61280-1-4 - Fibre optic communication subsystem test EN 61280-1-4 -
procedures -
Part 1-4: General communication subsystems
- Light source encircled flux measurement
method


IEC 61280-4-1 - Fibre optic communication subsystem test EN 61280-4-1 -
procedures -
Part 4-1: Installed cable plant - Multimode
attenuation measurement


IEC 61300-2 Series Fibre optic interconnecting devices and EN 61300-2 Series
passive components - Basic test and
measurement procedures -
Part 2: Tests


IEC 61300-3 Series Fibre optic interconnecting devices and EN 61300-3 Series
passive components - Basic test and
measurement procedures -
Part 3: Examinations and measurements


IEC 61300-3-1 - Fibre optic interconnecting devices and EN 61300-3-1 -
passive components - Basic test and
measurement procedures -
Part 3-1: Examinations and measurements -
Visual examination


ISO/IEC 17025 - General requirements for the competence of EN ISO/IEC 17025 -
testing and calibration laboratories

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SIST EN 61300-1:2011

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SIST EN 61300-1:2011
IEC 61300-1
®

Edition 3.0 2011-03

INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 1: General and guidance

Dispositifs d'interconnexion et composants passifs à fibres optiques –
Procédures fondamentales d'essais et de mesures –
Partie 1: Généralités et lignes directrices

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 33.180.20 ISBN 978-2-88912-407-7

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 61300-1:2011
– 2 – 61300-1  IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Standard atmospheric conditions . 8
5 Significance of the numerical value of a quantity . 8
5.1 General . 8
5.2 Quantity expressed as nominal value with tolerance . 8
5.3 Quantity expressed as a range of values . 9
6 Graphical symbols and terminology . 10
7 Safety . 10
8 Calibration . 10
8.1 General . 10
8.2 Round robin calibration procedure . 10
9 Launch conditions . 10
9.1 General . 10
9.2 Multimode launch conditions . 11
9.3 Single-mode launch conditions . 11
Annex A (informative) Round robin calibration procedure for dimensional
measurements on ferrules and sleeves . 12
Annex B (normative) Multimode launch condition requirements for measuring
attenuation. 15
Bibliography . 18

Figure A.1 – Flow chart of round robin calibration procedure . 13
Figure A.2 – Examples for the determination of the measurement points and the
marking of the round robin standards . 14
Figure B.1 – Encircled Flux template example . 16

Table 1 – Standard Atmospheric Conditions. 8
Table 2 – Expected uncertainty for measured attenuation of single connectors . 11
Table B.1 – EF requirements for 50 µm core fibre at 850 nm . 17
Table B.2 – EF requirements for 50 µm core fibre at 1300 nm . 17
Table B.3 – EF requirements for 62,5 µm fibre at 850 nm . 17
Table B.4 – EF requirements for 62,5 µm fibre at 1300 nm . 17

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SIST EN 61300-1:2011
61300-1  IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________

FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 1: General and guidance

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 61300-1 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre Optics.
This third edition cancels and replaces the second edition published in 2003. This edition
constitutes a technical revision. The changes with respect to the previous edition are to
reconsider the terms and definitions and multimode launch conditions.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3112/FDIS 86B/3164/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

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SIST EN 61300-1:2011
– 4 – 61300-1  IEC:2011
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all parts in the IEC 61300 series, published under the general title, Fibre optic
interconnecting and passive components – Basic test and measurement procedures, 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 web site 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.

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SIST EN 61300-1:2011
61300-1  IEC:2011 – 5 –
INTRODUCTION
The publications in the IEC 61300 series contain information on environmental testing
procedures and measurement procedures relating to fibre optic interconnecting devices and
passive components. They are intended to be used to achieve uniformity and reproducibility in
environmental testing procedures and measurement procedures.
The term "test procedure" refers to procedures commonly known as environmental tests. The
expressions "environmental conditioning" and "environmental testing" refer to the
environments to which components or equipment may be exposed so that an assessment may
be made of their performance under the conditions of use, transport and storage.
The term "measurement procedure" refers to those measurements which are necessary
to assess the physical and optical characteristics of a component and may also be used
before, during or after a test procedure to measure the effects of environmental conditioning or
testing. The return loss and attenuation tests are examples of measurement procedures.
The requirements for the performance of components or equipment subjected to the test and
measurement procedures described in this standard are not included. The relevant
specification for the device under test defines the allowed performance limits.
When drafting a specification or purchase contract, only those tests which are necessary for
the relevant components or equipment taking into account the technical and economic
aspects should be specified.
The environmental test procedures are contained in the IEC 61300-2 series and the
measurement procedures in the IEC 61300-3 series. Each test or measurement procedure is
published as a stand-alone publication so that it may be modified, expanded or cancelled
without having an effect on any other test or measurement procedure. However it should be
noted that, where practical, reference is made to other standards as opposed to repeating all
or part of already existing standards. As an example, the cold test for fibre optic apparatus
refers to IEC 60068-2-1, but it also provides other needed information such as purpose,
recommended severities and a list of items to be specified.
Multiple methods may be contained in a test or measurement procedure. As an example,
several methods of measuring attenuation are contained in the attenuation measurement
procedure.
If more than one method is contained in a test or measurement procedure, the reference
method is identified.
The tests in this standard permit the performance of sample components or equipment to be
compared. To assess the overall quality of a production lot, the test procedures should be
applied in accordance with a suitable sampling plan and may be supplemented by appropriate
additional tests, if necessary.
To provide tests appropriate to the different intensities of an environmental condition, some of
the test procedures have a number of degrees of severity. These different degrees of severity
are obtained by varying the time, temperature or some other determining factor separately or
in combination.

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SIST EN 61300-1:2011
– 6 – 61300-1  IEC:2011
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 1: General and guidance



1 Scope
This part of IEC 61300 contains a series of environmental test and measurement procedures
and, in some cases, preferred severities designed to assess the ability of fibre optic
interconnecting devices and passive components to perform under expected service
conditions. Although the severities are primarily intended for land-based communications, the
procedures may be used for other applications. The object of this standard is to provide
uniform and reproducible environmental test procedures and measurement procedures, for
those preparing specifications for fibre optic interconnecting devices and passive
components.
These test and measurement procedures are designed to provide information on the following
properties of components and equipment, such as connectors, splices, switches, attenuators,
etc.:
a) ability to operate within specified limits of temperature, pressure, humidity, mechanical
stress or other environmental conditions and certain combinations of these conditions;
b) ability to withstand storage and transport;
c) ability to meet the specified levels of optical performance.
This standard should be used in combination with the relevant specification which will define
the tests to be used, the required degree of severity for each of them, their sequence,
if relevant, and the permissible performance limits. In the event of conflict between this basic
standard and the relevant specification, the latter will take precedence.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60050-731, International Electrotechnical Vocabulary – Chapter 731: Optical fibre
communication
IEC 60617, Graphical symbols for diagrams
IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements
IEC 60825-2, Safety of laser products – Part 2: Safety of optical fibre communication
systems (OFCS)
IEC 61280-1-4, Fibre optic communication subsystem test procedures – Part 1-4: General
communication subsystems – Light source encircled flux measurement method
IEC 61280-4-1, Fibre optic communication subsystem test procedures – Part 4-1: Installed
cable plant – Multimode attenuation measurement

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SIST EN 61300-1:2011
61300-1  IEC:2011 – 7 –
IEC 61300-2 (all parts), Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Tests
IEC 61300-3 (all parts), Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Examinations and measurements
IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-1: Examinations and measurements – Visual examination
ISO/IEC 17025, General requirements for the competence of testing and calibration
laboratories
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
test
technical operation that consists of the determination of one or more characteristics of a given
product, process or service according to a specified procedure and normally consists of the
following steps:
a) pre-conditioning (where required);
b) initial examination and measurement (where required);
c) conditioning;
d) recovery (where required);
e) final examination and measurement.
3.2
device under test
(DUT)
single component, equipment or other item designated to be tested in accordance with the
procedures of this standard
3.3
pre-conditioning
treatment of a DUT with the object of removing or partly counteracting the effects of its
previous history
NOTE When called for, it is the first step in the test procedure.
3.4
conditioning
exposure of a DUT to environmental conditions in order to determine the effects of such
conditions on the DUT
NOTE Where measurements are required during conditioning, this will be stated in the relevant specification.
3.5
recovery
treatment of a DUT after conditioning in order that the properties of the DUT may stabilise
before measurement

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SIST EN 61300-1:2011
– 8 – 61300-1  IEC:2011
3.6
sample
group of DUTs, selected at random or by some other specified procedure from a larger
population and which, for the purpose of testing, is intended to be representative of the larger
population
4 Standard atmospheric conditions
Standard atmospheric conditions shall be controlled within some range to ensure proper
correlation of data obtained from measurements and tests conducted in various facilities. Test
and measurement procedures shall be conducted under the following atmospheric conditions
unless otherwise specified. In some cases special ambient conditions may be needed and can
be specified in the relevant specification.
The standard range of atmospheric conditions for carrying out measurements and tests is set
out in Table 1.
Table 1 – Standard Atmospheric Conditions
Temperature Relative humidity Air pressure
86 kPa to 106 kPa
o o
18 C to 28 C 25 % to 75 %
(860 mbar to 1 060 mbar)

Variations in ambient temperature and humidity shall be kept to a minimum during a series of
measurements.
5 Significance of the numerical value of a quantity
5.1 General
The numerical values of quantities for the various parameters (temperature, humidity, stress,
duration, optical power levels, etc.) given in the basic methods of environmental and optical
testing constituting the IEC 61300-2 series and the optical and physical measurements
constituting the IEC 61300-3 series are expressed in different ways according to the needs of
each individual test.
The two cases that most frequently arise are:
a) the quantity is expressed as a nominal value with a tolerance;
b) the quantity is expressed as a range of values.
For these two cases, the significance of the numerical value is discussed in 5.2 and 5.3.
5.2 Quantity expressed as nominal value with tolerance
Examples of two forms of presentation:
a) 40 mm ± 2 mm
2 s ± 0,5 s
0,3 dB ± 0,1 dB
+ 3
b) 93 % %
–2
The expression of a quantity as a numerical value indicates the intention that the test should
be carried out at the stated value. The object of stating tolerances is to take account of the
following factors in particular:

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SIST EN 61300-1:2011
61300-1  IEC:2011 – 9 –
− the difficulties in regulating some devices and their drift (undesired slow variation) during
the test;
− instrument errors;
− non-uniformity of environmental parameters, for which no specific tolerances are given, in
the test space in which the DUTs under test are located.
These tolerances are not intended to allow latitude in the adjustment of the values of the
parameter within the test space. Hence, when a quantity is expressed by a nominal value with
a tolerance, the test apparatus shall be adjusted so as to obtain this nominal value making
allowance for instrument errors.
In principle, the test apparatus shall not be adjusted to maintain a limiting value of the
tolerance zone, even if its uncertainty is so small as to ensure that this limiting value would
not be exceeded.
EXAMPLE: If the quantity is expressed numerically as 100 ± 5, the test apparatus shall be adjusted to maintain the
target value of 100 making allowance for instrument errors and shall in no case be adjusted to maintain a target
value of 95 or 105.
In order to avoid any limiting value applicable to the DUT during the carrying out of the test, it
may be necessary in some cases to set the test apparatus near to one tolerance limit.
In the particular case where the quantity is expressed by a nominal value with a unilateral
tolerance (which is generally the case unless justified otherwise by special conditions, for
example, a non-linear response), the test apparatus shall be set as close as possible to the
nominal value (which is also a tolerance limit) taking account of the uncertainty of
measurement, which depends on the apparatus used for the test (including the instruments
used to measure the values of the parameters).
+ 0
EXAMPLE: If the quantity is expressed numerically as 100% % and the test apparatus is
–5
capable of an overall uncertainty in the control of the parameter of ± 1 %, then the test
apparatus should be adjusted to maintain a target value of 99 %. If, on the other hand, the
+ 2,5
overall uncertainty is % , then the adjustment should be set to maintain a target value of
–2,5
97,5 %.
5.3 Quantity expressed as a range of values
Examples of forms of presentation:
a) From 18 °C to 28 °C
Relative humidity from 80 % to 100 %
From 1 h to 2 h
b) Return loss ≥55 dB
Attenuation ≤0,50 dB
NOTE The use of words in expressing a range may lead to ambiguity; for example the phrase "from 80 % to
100 %" may, for some readers, exclude the values of 80 and 100 while, for others, they may be included. The use
of symbols, for example >80 or ≥80, is generally less likely to be ambiguous and is therefore to be preferred.
The expression of a quantity as a range of values
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