IEC 60051-9:2019

IEC 60051-9 ®
Edition 5.0 2019-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Direct acting indicating analogue electrical measuring instruments and their
accessories –
Part 9: Recommended test methods

Appareils de mesure électriques indicateurs analogiques à action directe et
leurs accessoires –
Partie 9: Méthodes d'essai recommandées

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.

need further assistance, please contact the Customer Service

Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Electropedia - www.electropedia.org
webstore.iec.ch/advsearchform Le premier dictionnaire d'électrotechnologie en ligne au
La recherche avancée permet de trouver des publications IEC monde, avec plus de 22 000 articles terminologiques en
en utilisant différents critères (numéro de référence, texte, anglais et en français, ainsi que les termes équivalents dans
comité d’études,…). Elle donne aussi des informations sur les 16 langues additionnelles. Egalement appelé Vocabulaire
projets et les publications remplacées ou retirées. Electrotechnique International (IEV) en ligne.

IEC Just Published - webstore.iec.ch/justpublished Glossaire IEC - std.iec.ch/glossary
Restez informé sur les nouvelles publications IEC. Just 67 000 entrées terminologiques électrotechniques, en anglais
Published détaille les nouvelles publications parues. et en français, extraites des articles Termes et Définitions des
Disponible en ligne et une fois par mois par email. publications IEC parues depuis 2002. Plus certaines entrées
antérieures extraites des publications des CE 37, 77, 86 et
Service Clients - webstore.iec.ch/csc CISPR de l'IEC.

Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC 60051-9 ®
Edition 5.0 2019-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Direct acting indicating analogue electrical measuring instruments and their

accessories –
Part 9: Recommended test methods

Appareils de mesure électriques indicateurs analogiques à action directe et

leurs accessoires –
Partie 9: Méthodes d'essai recommandées

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-6495-9

– 2 – IEC 60051-9:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements for test equipment . 7
4.1 General . 7
4.2 Test equipment for measuring the intrinsic uncertainty of an instrument and
the variations . 7
4.3 Test equipment for overload tests, self-heating, damping, overshoot and
response time . 7
4.4 Test equipment for phase shift . 7
4.5 Test equipment for temperatures . 7
4.6 Test equipment for humidity . 7
5 Test methods for determination of intrinsic uncertainty . 7
6 Test methods for damping . 8
7 Test methods for humidity . 8
8 Tests with distorted AC quantities . 8
9 Test methods for shock and vibration . 8
10 Test method for external magnetic field . 8
11 Test method for external electric field . 8
12 Test methods for electrical safety . 8
13 Test methods for electromagnetic compatibility (EMC) . 9
14 Test methods for recurrent tests . 9
15 Test methods for nonconformity . 9
Bibliography . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIRECT ACTING INDICATING ANALOGUE ELECTRICAL
MEASURING INSTRUMENTS AND THEIR ACCESSORIES –

Part 9: Recommended test methods

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 60051-9 has been prepared by IEC technical committee 85:
Measuring equipment for electrical and electromagnetic quantities.
This fifth edition cancels and replaces the fourth edition published in 1988,
Amendment 1:1994 and Amendment 2:1995. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) adding performance requirements for test equipment;
b) updating the references to the applicable standards for test methods.

– 4 – IEC 60051-9:2019 © IEC 2019
The text of this International Standard is based on the following documents:
FDIS Report on voting
85/663/FDIS 85/672/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This International Standard is to be used in conjunction with IEC 60051-1:2016.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60051 series, published under the general title Direct acting
indicating analogue electrical measuring instruments and their accessories, can be found on
the IEC website.
The committee has decided that the contents of this document 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 document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
IEC 60051 is published in separate parts according to the following structure and under the
general title Direct acting indicating analogue electrical measuring instruments and their
accessories.
Part 1: Definitions and general requirements common to all parts
Part 2: Special requirements for ammeters and voltmeters
Part 3: Special requirements for wattmeters and varmeters
Part 4: Special requirements for frequency meters
Part 5: Special requirements for phase meters, power factor meters and synchroscopes
Part 6: Special requirements for ohmmeters (impedance meters) and conductance meters
Part 7: Special requirements for multi-function instruments
Part 8: Special requirements for accessories
Part 9: Recommended test methods
IEC 60051-9 is not complete in itself and is read in conjunction with IEC 60051-1.

– 6 – IEC 60051-9:2019 © IEC 2019
DIRECT ACTING INDICATING ANALOGUE ELECTRICAL
MEASURING INSTRUMENTS AND THEIR ACCESSORIES –

Part 9: Recommended test methods

1 Scope
This part of IEC 60051 applies to direct acting indicating analogue electrical measuring
instruments and their accessories and gives guidance for applicable test methods and for the
performance of test equipment.
This document does not apply to:
– special purpose instruments that are covered by their own IEC International Standards;
– special purpose devices that are covered by their own IEC International Standards when
they are used as accessories.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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 60051-1:2016, Direct acting indicating analogue electrical measuring instruments and
their accessories – Part 1: Definitions and general requirements common to all parts
IEC 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 61000-4-8, Electromagnetic compatibility (EMC) – Part 4-8: Testing and measurement
techniques – Power frequency magnetic field immunity test
IEC 61010-1:2010, Safety requirements for electrical equipment for measurement, control,
and laboratory use – Part 1: General requirements
IEC 61010-2-030, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 2-030: Particular requirements for equipment having testing or
measuring circuits
IEC 61326-1:2012, Electrical equipment for measurement, control and laboratory use – EMC
requirements – Part 1: General requirements
IEC 61326-2-1, Electrical equipment for measurement, control and laboratory use – EMC
requirements – Part 2-1: Particular requirements – Test configurations, operational conditions
and performance criteria for sensitive test and measurement equipment for EMC unprotected
applications
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60051-1:2016
apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Requirements for test equipment
4.1 General
Test equipment shall have sufficient accuracy and stability for the determination of the
intrinsic uncertainty of an instrument and the variations.
NOTE Calibration protocols can be used.
4.2 Test equipment for measuring the intrinsic uncertainty of an instrument and the
variations
The maximum instrumental uncertainty of reference instruments used to determine the
intrinsic uncertainty of an instrument and the variations shall be 0,2 times the class index of
the instrument under test. In the event that a calibration protocol is used, the maximum
calibration uncertainty shall be 0,2 times the class index of the equipment under test (EUT).
4.3 Test equipment for overload tests, self-heating, damping, overshoot and
response time
The maximum uncertainty of the settings of the electrical quantities that will be used to test
overload, self-heating, damping, overshoot and response time shall be ±1 % of those settings.
4.4 Test equipment for phase shift
Test equipment for settings of the phase shift of power meters with class indexes of 0,5 or
higher shall have an uncertainty of ±1° or better.
Test equipment for settings of the phase shift of power meters with class indexes below 0,5
shall have a maximum uncertainty of ±0,1° or better. The instrumental uncertainty of test
equipment for phase meters and power factor meters shall comply with 4.2.
4.5 Test equipment for temperatures
Equipment for the setting of temperatures shall have a maximum uncertainty in the
temperature setting of ±1 °C in the case of EUT with a class index equal to or below 0,3. In
the case of EUT with a class index above 0,3, the maximum uncertainty of the setting shall be
±2 °C.
4.6 Test equipment for humidity
Equipment for settings of humidity shall have a maximum uncertainty in the humidity settings
of ±3 %
5 Test methods for determination of intrinsic uncertainty
The intrinsic uncertainty at defined test points shall be checked with slowly increasing and
decreasing measuring values without any overshoot and without tapping. The test points for
the type test can be defined by the manufacturer. During the routine tests, tests should be
carried out at full scale at all ranges and the characteristics should be tested in one range at a
minimum.
– 8 – IEC 60051-9:2019 © IEC 2019
Tapping is only allowed for the determination of scale marks and for the determination of
variations.
6 Test methods for damping
Damping shall be tested at 66 % of the scale length.
7 Test methods for humidity
The settings of the relative humidity in relation to temperatures shall be in accordance with
the relevant requirements of IEC 60051-1. The minimum test duration for the determination of
the variation shall be at least 48 h.
8 Tests with distorted AC quantities
rd th
Peak factors deviating from 1,414 1 should be simulated by a combination of the 3 , 5 and
th th
7 harmonic. Distortions should be simulated with the 7 harmonic.
9 Test methods for shock and vibration
Tests for mechanical shock shall be in accordance with the requirements for mechanical
strength of IEC 61010-1.
The test method for vibration shall be in accordance
...