Safety requirements for electrical equipment for measurement, control and laboratory use - Part 2-051: Particular requirements for laboratory equipment for mixing and stirring

IEC 61010-2-051:2018 is also available as IEC 61010-2-051:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61010-2-051:2018 is applicable to electrically operated laboratory equipment and its accessories for mechanical mixing and stirring, where mechanical energy influences the shape or size or homogeneity of materials and their accessories. Such devices can contain heating elements. It has the status of a group safety publication in accordance with IEC Guide 104. This fourth edition cancels and replaces the third edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- adaptation of changes introduced by Amendment 1 of IEC 61010-1;
- added tolerance for stability of AC voltage test equipment to Clause 6;
- added required assessment for equipment intended to be used with flammable, hazardous, or toxic fluids to Clause 17.
This Part 2-051 is intended to be used in conjunction with IEC 61010-1. It was established on the basis of the third edition (2010) and its Amendment 1 (2016).

Exigences de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-051: Exigences particulières pour appareils de laboratoire utilisés pour mélanger et agiter

IEC 61010-2-051:2018 est disponible sous forme de IEC 61010-2-051:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L’IEC 61010-2-051:2018 est applicable aux appareils de laboratoire électriques et à leurs accessoires, destinés à mélanger et à agiter, et qui, par l’énergie mécanique dispensée, modifient la forme, la taille ou l’homogénéité des matériaux et de leurs accessoires. De tels appareils peuvent contenir des éléments de chauffage. Elle a le statut d'une publication groupée de sécurité conformément au Guide IEC 104. Cette quatrième édition annule et remplace la troisième édition parue en 2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- adaptation des modifications introduites par l’Amendement 1 de l’IEC 61010-1;
- ajout à l’Article 6 de la tolérance pour la stabilité du matériel d’essai en tension alternative;
- ajout à l’Article 17 de l’appréciation du risque exigée pour le matériel destiné à être utilisé avec des fluides inflammables, dangereux ou toxiques.
Cette partie 2-051 est destinée à être utilisée conjointement avec l'IEC 61010-1. Elle a été établie sur la base de la troisième édition (2010) et de son Amendement 1 (2016).

General Information

Status
Published
Publication Date
04-Oct-2018
Current Stage
PPUB - Publication issued
Completion Date
05-Oct-2018
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IEC 61010-2-051
Edition 4.0 2018-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for electrical equipment for measurement, control, and
laboratory use –
Part 2-051: Particular requirements for laboratory equipment for mixing and
stirring
Exigences de sécurité pour appareils électriques de mesurage, de régulation, et
de laboratoire –

Partie 2-051: Exigences particulières pour appareils de laboratoire utilisés pour

mélanger et agiter
IEC 61010-2-051:2018-10(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC 61010-2-051
Edition 4.0 2018-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for electrical equipment for measurement, control, and
laboratory use –
Part 2-051: Particular requirements for laboratory equipment for mixing and
stirring
Exigences de sécurité pour appareils électriques de mesurage, de régulation, et
de laboratoire –

Partie 2-051: Exigences particulières pour appareils de laboratoire utilisés pour

mélanger et agiter
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080; 71.040.20 ISBN 978-2-8322-6061-6

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 61010-2-051:2018 © IEC 2018
CONTENTS

FOREWORD ......................................................................................................................... 3

1 Scope and object ........................................................................................................... 5

2 Normative references..................................................................................................... 5

3 Terms and definitions .................................................................................................... 5

4 Tests ............................................................................................................................. 5

5 Marking and documentation ........................................................................................... 5

6 Protection against electric shock .................................................................................... 6

7 Protection against mechanical HAZARDS .......................................................................... 6

8 Resistance to mechanical stresses ................................................................................. 7

9 Protection against the spread of fire ............................................................................... 8

10 Equipment temperature limits and resistance to heat ...................................................... 8

11 Protection against HAZARDS from fluids and solid foreign objects ..................................... 8

12 Protection against radiation, including laser sources, and against sonic and

ultrasonic pressure ........................................................................................................ 8

13 Protection against liberated gases and substances, explosion and implosion .................. 8

14 Components and subassemblies .................................................................................... 8

15 Protection by interlocks .................................................................................................. 8

16 HAZARDS resulting from application ................................................................................. 9

17 RISK assessment ........................................................................................................... 9

Annexes ............................................................................................................................... 9

Bibliography ....................................................................................................................... 10

---------------------- Page: 4 ----------------------
IEC 61010-2-051:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT FOR
MEASUREMENT, CONTROL, AND LABORATORY USE –
Part 2-051: Particular requirements for laboratory
equipment for mixing and stirring
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 61010-2-051 has been prepared by IEC technical committee 66:

Safety of measuring, control and laboratory equipment.

It has the status of a group safety publication in accordance with IEC Guide 104.

This fourth edition cancels and replaces the third edition published in 2015. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) adaptation of changes introduced by Amendment 1 of IEC 61010-1;
b) added tolerance for stability of AC voltage test equipment to Clause 6;
---------------------- Page: 5 ----------------------
– 4 – IEC 61010-2-051:2018 © IEC 2018

c) added required RISK assessment for equipment intended to be used with flammable,

hazardous, or toxic fluids to Clause 17.
The text of this International Standard is based on the following documents:
CDV Report on voting
66/642/CDV 66/667/RVC

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 document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of the IEC 61010 series, under the general title: Safety requirements for

electrical equipment for measurement, control, and laboratory use, may be found on the IEC

website.

This Part 2-051 is intended to be used in conjunction with IEC 61010-1. It was established on

the basis of the third edition (2010) and its Amendment 1 (2016).

This Part 2-051 supplements or modifies the corresponding clauses in IEC 61010-1 so as to

convert that publication into the IEC standard: Particular requirements for laboratory

equipment for mixing and stirring.

Where a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies

as far as is reasonable. Where the part states “addition”, “modification”, “replacement” or

“deletion”, the relevant requirement, test specification, or note in Part 1 should be adapted

accordingly.
In this standard:
1) the following print types are used:
– requirements: in roman type;
– NOTES: in small roman type;
– conformity and test: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL
ROMAN CAPITALS;

2) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered

starting from 101. Additional annexes are lettered starting from AA and additional list

items are lettered from aa).

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website 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 61010-2-051:2018 © IEC 2018 – 5 –
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT FOR
MEASUREMENT, CONTROL, AND LABORATORY USE –
Part 2-051: Particular requirements for laboratory
equipment for mixing and stirring
1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the text, except the first paragraph, with the following new text:

This part of IEC 61010 is applicable to electrically operated laboratory equipment and its

accessories for mechanical mixing and stirring, where mechanical energy influences the

shape or size or homogeneity of materials and their accessories. Such devices can contain

heating elements.

NOTE If all or part of the equipment falls within the scope of one or more other Part 2 standards of the IEC 61010

series as well as within the scope of this document, consideration is given to those other Part 2 standards. The

standard for equipment which contains heating devices is IEC 61010-2-010.
2 Normative references
This clause of Part 1 is applicable.
3 Terms and definitions
This clause of Part 1 is applicable.
4 Tests
This clause of Part 1 is applicable.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:
5.4.1 General
Addition:
Add, after item h), the following new item:

aa) if a HAZARD could be caused by operating a mixer or stirrer intended for use as

HAND-HELD EQUIPMENT, there shall be a warning statement to that effect.
---------------------- Page: 7 ----------------------
– 6 – IEC 61010-2-051:2018 © IEC 2018
5.4.4 Equipment operation
Addition:
Add after item j), the following new item:

aa) instructions for fixing the stirring vessel if specified and sold as part of a mixing system,

or if otherwise applicable.
Add a new paragraph after the list of items as follows:

The instructions shall warn against use of the equipment in hazardous atmospheres or with

hazardous materials for which the equipment is not designed.
Replacement:

Replace the paragraph before the compliance statement with the following new text:

The user shall be made aware that the protection provided by the equipment can be impaired

if the equipment is used with accessories not provided or recommended by the manufacturer,

or used in a manner not specified by the manufacturer.
6 Protection against electric shock
This clause of Part 1 is applicable except as follows:
6.8.3.1 The AC voltage test
Replacement:
Replace the first sentence with the following new sentence:

The voltage tester shall be capable of maintaining the test voltage throughout the test within

± 5 % of the specified value.
7 Protection against mechanical HAZARDS
This clause of Part 1 is applicable except as follows:
7.3.2 Exceptions
Replacement:

Replace, in item a), the words "for example drilling and mixing equipment” with the following:

for example stirrer shafts and impellers extending downwards into material being stirred

Addition:
Add the following new subclauses:
7.3.101 Speed controls

If a SINGLE FAULT of an electronic speed control could cause a HAZARD, the equipment shall

incorporate means to interrupt power or otherwise prevent the HAZARD.
---------------------- Page: 8 ----------------------
IEC 61010-2-051:2018 © IEC 2018 – 7 –
Conformity is checked by inspection and test.
7.3.102 Movement during operation

Equipment other than HAND-HELD EQUIPMENT shall not change position during NORMAL USE.

Conformity is checked by inspection and test. Equipment which has not moved by more

than 5 mm after operation for 10 min is considered to meet the requirement.
7.3.103 Restarting after interruption
Depending on the operation, a HAZARD can be caused either by re-starting or by

not re-starting after interruption of the mixing action. Instructions shall specify whether

equipment will re-start or not re-start, both in the case of MAINS interruption and in the case of

HAZARD can occur the equipment shall
a fault or mechanical interruption. If after interruption a

be equipped with an audible or visible signal to warn that an interruption has occurred.

Conformity is checked by inspection of documentation.
7.3.104 HAZARDS related to application

Additional HAZARDS can occur with equipment used to mix flammable materials, or where the

transfer of mechanical energy to a glass apparatus could lead to breakage.

Instructions for use shall warn against the use of equipment in such applications unless the

equipment incorporates appropriate safety devices to prevent a HAZARD in SINGLE FAULT

CONDITION. Such safety devices shall be independent from control systems.
Examples of HAZARDS and appropriate safety devices include the following:
HAZARD, for example in metal-organic
a) Where failure of the mixing action could cause a
reactions, the safety device shall initiate an alarm signal:
1) if the drive shaft or mixer fails to turn when the mixer is switched on; or
2) when an overload causes the shaft speed to fall below a preset level.

NOTE Speed reduction can be caused by a lack of power or by the operation of an automatic device which

reduces the shaft speed in the case of an overload.

b) Where a HAZARD could be caused by excessive torque applied to high-viscosity material,

for example through glass breakage, the safety device shall initiate an alarm signal if the

torque rises above a preset level. It is recommended that safety devices work according to

the principle of rest-current.
Conformity is checked by inspection and test.
8 Resistance to mechanical stresses
This clause of Part 1 is applicable except as follows:
8.1 General
Replacement:
Replace the text of item 3) with the following new text:

3) except for FIXED EQUIPMENT, for equipment with a mass over 100 kg, or for equipment

whose size and weight make unintentional movement unlikely and which is not moved in

NORMAL USE, the appropriate test of 8.3. The equipment is not operated during the tests.

---------------------- Page: 9 ----------------------
– 8 – IEC 61010-2-051:2018 © IEC 2018
9 Protection against the spread of fire
This clause of Part 1 is applicable.
10 Equipment temperature limits and resistance to heat
This clause of Part 1 is applicable.
11 Protection against HAZARDS from fluids and solid foreign objects
This clause of Part 1 is applicable except as follows:
Addition:
Add the following new subclause:
11.101 Connections for hoses and pipes

Connectors shall be so designed that hoses can be prevented from detaching, for example by

means of hose clamps, and that pipes are adequately restrained.
Conformity is checked by inspection.
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure
This clause of Part 1 is applicable.
13 Protection against liberated gases and substances, explosion and implosion
This clause of Part 1 is applicable except as follows:
Addition:
Add the following new subclause:
13.2.101 Protection against explosion and explosives

Equipment designed for protection against explosion or to be used with explosives shall,

according to the type, the mode of operation and the location, comply with the appropriate

requirements of relevant IEC and ISO standards such as the IEC 60079 series on explosive

atmospheres.
Conformity is checked as specified in the relevant standards.
14 Components and subassemblies
This clause of Part 1 is applicable.
15 Protection by interlocks
This clause of Part 1 is applicable except as follows:
---------------------- Page: 10 ----------------------
IEC 61010-2-051:2018 © IEC 2018 – 9 –
15.1 General
Addition:
Add, after the first paragraph, the following new paragraph:

As an alternative method, for interlock systems containing electric/electronic or programmable

components (E/E/P components) the reliability and design requirements can be determined by

applying for example IEC 62061 (SIL) or ISO 13849 (all parts) (PL) or other solutions

providing equivalent functional safety.
16 HAZARDS resulting from application
This clause of Part 1 is applicable.
17 RISK assessment
This clause of Part 1 is applicable except as follows:
Addition:
Add the following new text at the end of the first sentence:

RISK assessment is required for mixers or stirrers intended to be used with flammable fluids or

with containers or flasks with hazardous or toxic fluids.
Annexes
The annexes of Part 1 are applicable.
---------------------- Page: 11 ----------------------
– 10 – IEC 61010-2-051:2018 © IEC 2018
Bibliography
The Bibliography of Part 1 is applicable, except as follows:
Addition:
Add the following new references:

IEC 61010-2-010, Safety requirements for electrical equipment for measurement, control, and

laboratory use – Part 2-010: Particular requirements for laboratory equipment for the heating

of materials

IEC 62061, Safety of machinery – Functional safety of safety-related electrical, electronic and

programmable electronic control systems

ISO 13849 (all parts), Safety of machinery – Safety-related parts of control systems

____________
---------------------- Page: 12 ----------------------
– 12 – IEC 61010-2-051:2018 © IEC 2018
SOMMAIRE

AVANT-PROPOS ................................................................................................................ 13

1 Domaine d'application et objet ..................................................................................... 15

2 Références normatives ................................................................................................ 15

3 Termes et définitions ................................................................................................... 15

4 Essais ......................................................................................................................... 15

5 Marquage et documentation ......................................................................................... 15

6 Protection contre les chocs électriques ........................................................................ 16

7 Protection contre les DANGERS mécaniques .................................................................. 16

8 Résistance aux contraintes mécaniques ....................................................................... 18

9 Protection contre la propagation du feu ........................................................................ 18

10 Limites de température de l’appareil et résistance à la chaleur ..................................... 18

11 Protection contre les DANGERS des fluides et des corps solides étrangers ..................... 18

12 Protection contre les radiations, y compris les sources laser, et contre la pression

acoustique et ultrasonique ........................................................................................... 18

13 Protection contre les émissions de gaz et substances, les explosions et les

implosions ................................................................................................................... 18

14 Composants et sous-ensembles ................................................................................... 19

15 Protection par systèmes de verrouillage ....................................................................... 19

16 DANGERS résultant de l’application ............................................................................... 19

17 Appréciation du RISQUE ................................................................................................ 19

Annexes ............................................................................................................................. 19

Bibliographie ...................................................................................................................... 20

---------------------- Page: 13 ----------------------
IEC 61010-2-051:2018 © IEC 2018 – 13 –
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
EXIGENCES DE SÉCURITÉ POUR APPAREILS ÉLECTRIQUES
DE MESURAGE, DE RÉGULATION, ET DE LABORATOIRE –
Partie 2-051: Exigences particulières pour appareils
de laboratoire utilisés pour mélanger et agiter
AVANT-PROPOS

1) La Commission Electrotechnique Internationale (IEC) est une organisation mondiale de normalisation

composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l’IEC). L’IEC a pour

objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines

de l'électricité et de l'électronique. A cet effet, l’IEC – entre autres activités – publie des Normes

internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au

public (PAS) et des Guides (ci-après dénommés "Publication(s) de l’IEC"). Leur élaboration est confiée à des

comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les

organisations internationales, gouvernementales et non gouvernementales, en liaison avec l’IEC, participent

également aux travaux. L’IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),

selon des conditions fixées par accord entre les deux organisations.

2) Les décisions ou accords officiels de l’IEC concernant les questions techniques représentent, dans la mesure

du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l’IEC

intéressés sont représentés dans chaque comité d’études.
3) Les Publications de l’IEC
...

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