Direct acting indicating analogue electrical measuring instruments and their accessories - Part 9: Recommended test methods

IEC 60051-9:2019 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.
IEC 60051-9:2018 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.

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

IEC 60051-9:2019 s'applique aux appareils de mesure électriques indicateurs analogiques à action directe et à leurs accessoires, et fournit des recommandations pour les méthodes d'essai applicables ainsi que pour les performances de l'équipement d'essai.
Ce document ne s'applique pas aux:
– appareils spéciaux couverts par leurs propres Normes internationales IEC;
– dispositifs spéciaux couverts par leurs propres Normes internationales IEC, lorsqu'ils sont utilisés en tant qu'accessoires.
IEC 60051-9:2018 annule et remplace la quatrième édition parue en 1988, son Amendement 1:1994 et son Amendement 2:1995. Cette édition constitue une révision technique.
La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) ajout d'exigences de performance pour l'équipement d'essai;
b) mise à jour des références aux normes de méthodes d'essai applicables.

General Information

Status
Published
Publication Date
14-Feb-2019
Current Stage
PPUB - Publication issued
Completion Date
15-Feb-2019
Ref Project

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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
IEC 60051-9:2019-02(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
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

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: 3 ----------------------
– 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

---------------------- Page: 4 ----------------------
IEC 60051-9:2019 © IEC 2019 – 3 –
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

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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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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.
---------------------- Page: 5 ----------------------
– 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.
---------------------- Page: 6 ----------------------
IEC 60051-9:2019 © IEC 2019 – 5 –
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.

---------------------- Page: 7 ----------------------
– 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.
---------------------- Page: 8 ----------------------
IEC 60051-9:2019 © IEC 2019 – 7 –

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.
---------------------- Page: 9 ----------------------
– 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
...

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