EN IEC 61010-2-051:2021/A11:2021

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.

Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2-051: Besondere Anforderungen an Laborgeräte zum Mischen und Rühren

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

Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko uporabo - 2-051. del: Posebne zahteve za laboratorijsko opremo za mešanje in premešavanje

General Information

• Status: Published
• Publication Date: 09-Sep-2021
• ICS: 19.080 - Electrical and electronic testing
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: CLC/TC 66X - Safety of measuring, control, and laboratory equipment
• Drafting Committee: CLC/TC 66X - Safety of measuring, control, and laboratory equipment
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 10-Sep-2021
• Due Date: 18-Sep-2022
• Completion Date: 10-Sep-2021
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN IEC 61010-2-051:2021/A11:2021 - Safety requirements for electrical equipment for measurement, control and laboratory use - Part 2-051: Particular requirements for laboratory equipment for mixing and stirring

Relations

• Amends: EN IEC 61010-2-051:2021 - Safety requirements for electrical equipment for measurement, control and laboratory use - Part 2-051: Particular requirements for laboratory equipment for mixing and stirring
• Effective Date: 03-Mar-2020

Overview

EN IEC 61010-2-051:2021/A11:2021 is a critical European standard published by the CLC that sets out the safety requirements for electrical equipment used for measurement, control, and laboratory applications, specifically focusing on laboratory equipment designed for mechanical mixing and stirring. This standard supplements the general requirements of Part 1 of IEC 61010 by addressing particular safety concerns for devices where mechanical energy impacts materials, such as changes in shape, size, or homogeneity during mixing or stirring operations. The scope includes equipment with or without integrated heating elements, referencing IEC 61010-2-010 for heating device safety.

This amendment (A11) updates the 2021 edition of EN IEC 61010-2-051 to enhance safety protocols, especially concerning hazards from mechanical mixing processes, explosion protection, and control system safety validation. It aligns with EU directives, supporting appliance manufacturers and laboratory users in complying with regulatory safety obligations.

Key Topics

• Scope and Application: Applies to all electrically operated laboratory equipment and accessories involved in mechanical mixing and stirring within chemical and scientific laboratory environments.
• Mechanical Energy Hazards: Focus on risks arising from mechanical forces, such as torque on high-viscosity fluids possibly causing glass breakage or other mechanical failures.
• Speed Controls: Requirements for speed control mechanisms include testing beyond maximum speed limits to ensure the system withstands overload without failure.
• Protection Against Explosion: Incorporates references to the EN 60079 series standards addressing equipment safety in explosive atmospheres, ensuring laboratory mixers are safe for use in hazardous environments.
• Safety Interlocks: Validation of interlock systems using IEC 62061 and ISO 13849 standards for functional safety and performance levels. Manufacturers must provide documentation on Safety Integrity Levels (SIL) or Performance Levels (PL).
• Expelled Materials Hazard: Recognizes expelled parts may include both equipment parts and stirred sample materials, necessitating design provisions to mitigate risks.
• Normative References: Integrates multiple international and European standards relevant to machinery safety, control systems, and explosion protection to ensure comprehensive safety coverage.

Applications

EN IEC 61010-2-051:2021/A11:2021 is essential for manufacturers and users of laboratory mixers and stirrers used in:

• Chemical research laboratories
• Pharmaceutical production and testing
• Food and beverage laboratory testing
• Materials science and formulation labs
• Quality control and process monitoring laboratories

Its adoption improves safety in environments requiring reliable control of mixing operations, where potential hazards from mechanical forces or explosive atmospheres must be mitigated. Laboratories utilizing this standard ensure safer handling of samples, reduce risk of injuries, and comply with EU safety regulations for electrical equipment.

Related Standards

• EN IEC 61010-1: General safety requirements for electrical equipment for measurement, control, and laboratory use.
• IEC 61010-2-010: Particular requirements for laboratory equipment with heating elements.
• EN 60079 series: Explosion protection standards for electrical equipment in hazardous locations, including flameproof enclosures and intrinsic safety.
• IEC 62061 and ISO 13849: Standards for functional safety of machinery control systems, interlock validation, and safety integrity levels.

Practical Value

Implementing EN IEC 61010-2-051:2021/A11:2021 ensures laboratory mixers and stirring devices meet up-to-date electrical and mechanical safety requirements, reducing risk of accidents related to overheating, mechanical failures, or combustible atmospheres. Users benefit from:

• Improved safety for operators and laboratory personnel
• Enhanced machine reliability under maximum speed and torque conditions
• Compliance with EU Low Voltage Directive 2014/35/EU safety objectives
• Clear guidelines for hazard control, including alarm systems for excessive torque
• Validated control systems with documented safety integrity, aligning with industry best practices

In summary, this standard is indispensable for manufacturers aiming to design and market safe laboratory mixing equipment, and for laboratories committed to maintaining high safety standards in electrically operated mixing and stirring operations.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2021
Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko
uporabo - 2-051. del: Posebne zahteve za laboratorijsko opremo za mešanje in
premešavanje
Safety requirements for electrical equipment for measurement, control and laboratory
use - Part 2-051: Particular requirements for laboratory equipment for mixing and stirring
Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2
-051: Besondere Anforderungen an Laborgeräte zum Mischen und Rühren
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
Ta slovenski standard je istoveten z: EN IEC 61010-2-051:2021/A11:2021
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61010-2-
051:2021/A11
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 19.080; 71.040.20
English Version
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 Sicherheitsbestimmungen für elektrische Mess-, Steuer-,
mesurage, de régulation et de laboratoire - Partie 2-051 : Regel- und Laborgeräte - Teil 2-051: Besondere
Exigences particulières pour appareils de laboratoire Anforderungen an Laborgeräte zum Mischen und Rühren
utilisés pour mélanger et agiter
This amendment A11 modifies the European Standard EN IEC 61010-2-051:2021; it was approved by CENELEC on 2021-08-02.
CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
amendment the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61010-2-051:2021/A11:2021 E

European foreword
This document (EN IEC 61010-2-051:2021/A11:2021) has been prepared by CLC/TC 66X “Safety of
measuring, control, and laboratory equipment”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2022-08-02
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2024-08-02
conflicting with this document have to be
withdrawn
This document amends EN IEC 61010-2-051:2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential requirements
of EU Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral part
of this document.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
1 Additions to Clause 2, “Normative references”
Add the following normative references to Clause 2:
“
EN IEC 60079-0:2018, Explosive atmospheres - Part 0: Equipment - General requirements (IEC 60079-
0:2017)
EN 60079-1:2014, Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
(IEC 60079-1:2014)
EN 60079-2:2014, Explosive atmospheres - Part 2: Equipment protection by pressurized enclosure "p"
(IEC 60079-2:2014)
EN 60079-5:2015, Explosive atmospheres - Part 5: Equipment protection by powder filling "q"
(IEC 60079-5:2015)
EN 60079-7:2015 , Explosive atmospheres - Part 7: Equipment protection by increased safety “e”
(IEC 60079-7:2015)
EN 60079-11:2012, Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
(IEC 60079-11:2011)
EN IEC 60079-15:2019, Explosive atmospheres - Part 15: Equipment protection by type of protection
"n" (IEC 60079-15:2017)
EN 60079-18:2015, Explosive atmospheres - Part 18: Equipment protection by encapsulation “m”
(IEC 60079-18:2014)
IEC 62061, Safety of machinery — Functional safety of safety-related electrical, electronic and
programmable electronic control systems
ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13849-2, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
“
2 Modification to 7.3.101, “Speed controls”
Replace the second paragraph with:
“Conformity is checked by inspection and the following test:
The speed control is overridden to achieve the maximum speed the moving parts can achieve. The
equipment shall be observed for a duration as specified in 4.4.3 or until the power to the moving parts
is interrupted permanently. The conformity criteria of 4.4.4.1 to 4.4.4.3 shall be observed and the
requirements of 7.3.1 and 7.7 shall be met during the test.”

As impacted by EN 60079-7:2015/A1:2018.
As impacted by EN 60079-18:2015/A1:2017.
3 Modification to 7.3.104, “HAZARDS related to application”
Replace Example b) with the following:
"
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.”
4 Modification to 7.7, “Expelled parts”
Add the following new paragraph before the note:
“Expelled parts include sample materials and fluids being mixed or stirred.”
5 Modification to 13.2.101, “Protection against explosion and explosives”
In the third line, replace “such as IEC 60079 series” by “including EN 60079 series”.
6 Modification to 15.1, “General”
Add to the conformity statement the following new paragraphs:
“If IEC 62061 or ISO 13849-1 is used to determine the requiremen
...