IEC 61010-2-012:2016

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-012: Particular requirements for climatic and environmental testing and other temperature conditioning equipment

IEC 61010-2-012:2016 specifies safety requirements for electrical equipment and their accessories within the categories a) through c), wherever they are intended to be used, whenever that equipment incorporates one or more of the following characteristics:
- A REFRIGERATING SYSTEM that is acted on or impacted by an integral heating function such that the combined heating and cooling system generates additional and/or more severe HAZARDS than those for the two systems if treated separately.
- The materials being treated in the intended application introduce significant heat into the REFRIGERATING SYSTEM that the cooling system in the application yield additional and/or more severe HAZARDS than those for the cooling system if operated at the maximum RATED ambient alone.
- An irradiation function for the materials being treated presenting additional HAZARDS.
- A function to expose the materials being treated to excessive humidity, carbon dioxide, salt mist, or other substances which may result in additional HAZARDS.
- A function of MECHANICAL MOVEMENT presenting additional HAZARDS.
- Provision for an OPERATOR to walk-in to the operating area to load or unload the materials being treated.
It has the status of a group safety publication in accordance with IEC Guide 104.
This publication is to be read in conjunction with IEC 61010-1:2010.

Règles de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-012: Exigences particulières pour appareils d'essais climatiques et d'environnement, et autres appareils de conditionnement de température

L'IEC 61010-2-012:2016 spécifie les exigences de sécurité pour les appareils électriques et leurs accessoires relevant des catégories a) à c) quelle que soit l'utilisation à laquelle ils sont destinés, lorsque ces appareils comprennent une ou plusieurs des caractéristiques suivantes:
- Un SYSTEME FRIGORIFIQUE affecté ou influencé par une fonction de chauffage intégrée de sorte que le système de chauffage et de refroidissement combiné engendre des DANGERS supplémentaires et/ou plus graves que ceux pour les deux systèmes s'ils sont traités séparément.
- Les matières traitées dans l'application prévue génèrent une chaleur importante dans le SYSTEME FRIGORIFIQUE, de sorte que le système de refroidissement dans l'application engendre des DANGERS supplémentaires et/ou plus graves que ceux pour le système de refroidissement dans le cas où il est utilisé seul à la température ambiante ASSIGNEE maximale.
- Une fonction d'exposition aux rayonnements pour les matières traitées qui présentent des DANGERS supplémentaires.
- Une fonction dédiée à l'exposition des matières traitées à une humidité excessive, au dioxyde de carbone, au brouillard salin ou à d'autres substances qui peuvent engendrer des DANGERS supplémentaires.
- Une fonction de MOUVEMENT MECANIQUE qui présente des DANGERS supplémentaires.
- Un dispositif qui permet le déplacement de l'OPERATEUR vers la zone de manoeuvre afin de charger ou décharger les matières traitées.
Elle a le statut d'une publication groupée de sécurité conformément au Guide IEC 104.
Cette publication doit être lue conjointement avec la IEC 61010-1:2010

General Information

• Status: Published
• Publication Date: 11-Jul-2016
• ICS: 19.080 - Electrical and electronic testing
• Technical Committee: TC 66 - Safety of measuring, control and laboratory equipment
• Drafting Committee: WG 9 - TC 66/WG 9
• Current Stage: DELPUB - Deleted Publication
• Start Date: 31-Jan-2018
• Completion Date: 12-Apr-2019

Relations

• Revised: IEC 61010-2-012:2019 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-012: Particular requirements for climatic and environmental testing and other temperature conditioning equipment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61010-2-012


®


Edition 1.0 2016-07



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for electrical equipment for measurement, control and
laboratory use –
Part 2-012: Particular requirements for climatic and environmental testing and
other temperature conditioning equipment

Règles de sécurité pour appareils électriques de mesurage, de régulation et
de laboratoire –
Partie 2-012: Exigences particulières pour les appareils d'essais climatiques et
d'environnement, et autres appareils de conditionnement de température


IEC 61010-2-012:2016-07(en-fr)

---------------------- Page: 1 ----------------------
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IEC 61010-2-012



®



Edition 1.0 2016-07







INTERNATIONAL





STANDARD







NORME



INTERNATIONALE
colour

inside



GROUP SAFETY PUBLICATION

PUBLICATION GROUPÉE DE SÉCURITÉ






Safety requirements for electrical equipment for measurement, control and

laboratory use –

Part 2-012: Particular requirements for climatic and environmental testing and


other temperature conditioning equipment



Règles de sécurité pour appareils électriques de mesurage, de régulation et


de laboratoire –

Partie 2-012: Exigences particulières pour les appareils d'essais climatiques et

d'environnement, et autres appareils de conditionnement de température











INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 19.080 ISBN 978-2-8322-3504-1



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 61010-2-012:2016 © IEC 2016


CONTENTS



FOREWORD . 4

INTRODUCTION . 6

1 Scope and object . 9


2 Normative references. 10

3 Terms and definitions . 10

4 Tests . 16


5 Marking and documentation . 22
6 Protection against electric shock . 32
7 Protection against mechanical HAZARDS . 33
8 Resistance to mechanical stresses . 35
9 Protection against the spread of fire . 36
10 Equipment temperature limits and resistance to heat . 37
11 Protection against HAZARDS from fluids . 41
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 56
13 Protection against liberated gases and substances, explosion and implosion . 57
14 Components and subassemblies . 59
15 Protection by interlocks . 61
16 HAZARDS resulting from application. 63
17 RISK assessment . 64
Annex . 65
Annex K (normative) Insulation requirements not covered by 6.7 . 65
Annex L (informative) Index of defined terms . 66
Annex AA (informative) Useful symbols . 68
Annex BB (informative) Protection for people who are inside WALK-IN EQUIPMENT . 71
Annex CC (informative) Safety requirements for components and piping . 73
Annex DD (informative) Equipment containing FLAMMABLE REFRIGERANTS information
and marking requirements . 79
Annex EE (normative) Non-sparking “n” electrical device . 82

Bibliography . 83

Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a CONDENSER . 7
Figure 102 – Flow chart illustrating the selection process . 8
Figure 103 –Scratching TOOL tip details . 51

Table 1 – Symbols . 25
Table 101 – Time-temperature conditions . 29
Table 102 – Maximum temperatures for MOTOR-COMPRESSORS . 39
Table 103 – Minimum temperature for determination of SATURATED-VAPOUR PRESSURE
of REFRIGERANT . 46
Table 104 – REFRIGERANT flammability parameters . 54
Table 105 – Lamp or lamp systems considered photobiologically safe . 57

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IEC 61010-2-012:2016 © IEC 2016 – 3 –


Table 106 – Lamp or lamp systems considered photobiologically safe under certain

conditions . 57

Table AA.1 – Useful symbols . 68


Table CC.1 – Parameters of pressure vessels according to EN 14276-1 . 74

Table CC.2 – Parameters of piping according to EN 14276-2 . 75

Table CC.3 – Components and piping requirements . 76


Table CC.4 – Minimum wall thickness for copper and steel tubing . 78

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INTERNATIONAL ELECTROTECHNICAL COMMISSION


____________




SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT FOR

MEASUREMENT, CONTROL AND LABORATORY USE –



Part 2-012: Particular requirements for climatic and environmental testing

and other temperature conditioning equipment



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,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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agreement between the two organizations.
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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 61010-2-012 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.
The text of this standard is based on the following documents:
FDIS Report on voting
66/590/FDIS 66/599/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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IEC 61010-2-012:2016 © IEC 2016 – 5 –


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.


IEC 61010-2-012 is to be used in conjunction with the latest edition of IEC 61010-1. It was

established on the basis of the third edition (2010) of IEC 61010-1


This Part 2-012 .supplements or modifies the corresponding clauses in IEC 61010-1 so as to

convert that publication into the IEC standard: Particular requirements for climatic and

environmental testing and other temperature conditioning equipment.


Where a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies
as far as is reasonable. where this 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 and definitions: in roman type;
– NOTES: in smaller roman type;
– conformity and tests: 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.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

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– 6 – IEC 61010-2-012:2016 © IEC 2016


INTRODUCTION


This standard, in conjunction with Part 2-010 and Part 2-011, addresses the specific HAZARDS

associated with the heating and cooling of materials by equipment and are segregated as

follows:


specifically addresses the HAZARDS associated with equipment incorporating heating
IEC 61010-2-010

systems.

specifically addresses the HAZARDS associated with equipment incorporating REFRIGERATING
IEC 61010-2-011

SYSTEMS.

specifically addresses the HAZARDS associated with equipment incorporating both heating

and REFRIGERATING SYSTEMS that interact with each other such that the combined heating
IEC 61010-2-012 and cooling system yield additional or more severe HAZARDS for the two systems than if
treated separately. It also addresses the HAZARDS associated with the treatment of materials
by other factors like irradiation, excessive humidity, CO and MECHANICAL MOVEMENT etc.
2

Guidance for the application of the appropriate Part 2 standard(s)
When the equipment includes only a material heating system, and no REFRIGERATING SYSTEM
or other environmental factors apply, then Part 2-010 applies without needing Part 2-011 or
Part 2-012. Similarly, when the equipment includes only a REFRIGERATING SYSTEM, and no
material heating system or other environmental factors apply, then Part 2-011 applies without
needing Part 2-010 or Part 2-012. However, when the equipment incorporates both a material
heating system, and a REFRIGERATING SYSTEM or the materials being treated in the intended
application introduce significant heat into the REFRIGERATING SYSTEM, a determination should
be made whether the interaction between the two systems will generate additional or more
severe HAZARDS than if the systems were evaluated separately (application temperature, see
flow chart for selection process). If the interaction of the heating and cooling functions yields
no additional or more severe HAZARDS then both Part 2-010 and Part 2-011 apply for their
respective functions. Conversely, if additional or more severe HAZARDS result from the
combining of the heating and cooling function, or the equipment incorporates additional
material treatment factors then Part 2-012 applies but not Part 2-010 or Part 2-011.
What HAZARDS are applicable for a REFRIGERATING SYSTEM?
The typical HAZARDS for a REFRIGERATING SYSTEM (see Figure 101) consisting of a MOTOR-
COMPRESSOR, a CONDENSER, an expansion device and an EVAPORATOR include but are not
limited to:
– The maximum temperature of LOW-PRESSURE SIDE (return temperature) to the MOTOR-
COMPRESSOR. A MOTOR-COMPRESSOR incorporates a REFRIGERANT cooled motor and it
should be established that the maximum temperatures of LOW-PRESSURE SIDE under least

favourable condition do not exceed the insulation RATINGS within the motor.
– The maximum pressure of LOW-PRESSURE SIDE at the inlet to the MOTOR-COMPRESSOR. The
housing of the MOTOR-COMPRESSOR is exposed to this pressure and so the design RATING
of the MOTOR-COMPRESSOR housing should accommodate the worst case pressures whilst
providing the correct safety margin for a pressure vessel.
– The maximum temperature of HIGH-PRESSURE SIDE to the CONDENSER. The temperatures of
HIGH-PRESSURE SIDE under most unfavourable conditions may present a temperature
HAZARD if the OPERATOR is exposed to or electrical insulation is degraded.
– The maximum pressure of HIGH-PRESSURE SIDE at the outlet to the MOTOR-COMPRESSOR.
The REFRIGERANT components downstream of the MOTOR-COMPRESSOR up to the expansion
device are exposed to this pressure and so the design RATING of these components should
accommodate the worst case pressures whilst providing the appropriate safety margin for
a pressure vessel.
– The maximum application temperatures, namely, the SOAKED TEMPERATURE CONDITIONS,
where the heat is being extracted from, may impact the maximum temperature of LOW-
PRESSURE SIDE to the MOTOR-COMPRESSOR as well as present a temperature HAZARD if the

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IEC 61010-2-012:2016 © IEC 2016 – 7 –


OPERATOR is exposed to or electrical insulation is degraded. Whether this application

temperature is derived from an integral heating function of the device or from the heat

dissipated from the material being cooled the impact under worst case conditions should

be evaluated.

– The current draw of the equipment should be established when including the worst case

running conditions of the REFRIGERATING SYSTEM including any defrost cycles that may

apply.


The worst case conditions should be determined for the equipment and will include both the

least favourable NORMAL USE conditions as well as the most unfavourable testing results under
SINGLE FAULT CONDITIONS.


Maximum temperature
and pressure at
HIGH-PRESSURE SIDE
CONDENSER
MOTOR-
Expansion
COMPRESSOR
device
EVAPORATOR
Application
under SOAKED
Maximum temperature TEMPERATURE
and pressure at CONDITIONS
LOW-PRESSURE SIDE
IEC

Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a CONDENSER

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The selection process is illustrated in the following flow chart (see Figure 102).


Which Part 2 standard applies for equipment

under the scope of IEC 61010 that incorporates

heating and/or cooling?

Additional material treatment factors may
include irradiation, excessive humidity, CO ,
2

salt mist and chemicals etc.

Does the equipment
YES NO
Part 2-012 applies
incorporate additional material

alone
treatment factors?


YES NO
Does the equipment include a
REFRIGERATING SYSTEM?
Part 2-010 applies
alone
YES NO
Does the equipment include Part 2-011 applies
the heating of materials? alone
The application temperature could
be derived from the resultant heat
of the material being treated or an
integral heating function
Does the application
YES NO
Part 2-012 applies Both Part 2-010 and
temperature adversely impact
alone Part 2-011 apply
the REFRIGERATING SYSTEM?
The equipment shall be evaluated The equipment may take
to ensure the HAZARDS from the measures to reliably mitigate the
application temperature have impact of the application
been mitigated temperature

IEC
Figure 102 – Flow chart illustrating the selection process

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IEC 61010-2-012:2016 © IEC 2016 – 9 –


SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT FOR

MEASUREMENT, CONTROL AND LABORATORY USE –



Part 2-012: Particular requirements for climatic and environmental testing

and other temperature conditioning equipment








1 Scope and object

This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the first paragraph by the following:
This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51.
This Part 2 of IEC 61010 specifies safety requirements for electrical equipment and their
accessories within the categories a) through c), wherever they are intended to be used,
whenever that equipment incorporates one or more of the following characteristics:
– A REFRIGERATING SYSTEM that is acted on or impacted by an integral heating function such
that the combined heating and cooling system generates additional and/or more severe
HAZARDS than those for the two systems if treated separately.
– The materials being treated in the intended application introduce significant heat into the
REFRIGERATING SYSTEM that the cooling system in the application yield additional and/or
more severe HAZARDS than those for the cooling system if operated at the maximum RATED
ambient alone.
– An irradiation function for the materials being treated presenting additional HAZARDS.
– A function to expose the materials being treated to excessive humidity, carbon dioxide,
salt mist, or other substances which may result in additional HAZARDS.
– A function of MECHANICAL MOVEMENT presenting additional HAZARDS.

– Provision for an OPERATOR to walk-in to the operating area to load or unload the materials
being treated.
Addition:
Add the following text after the last paragraph:
NOTE 101 Examples of such equipment include environmental testing and plant growth TEST CHAMBERS,
refrigerating CIRCULATORS which incorporate heating, recirculating coolers for extracting heat.
If all or part of the equipment falls within the scope of one or more other Part 2 standards of
IEC 61010 as well as within the scope of this standard, it should also meet the requirements
of those other Part 2 standards. However, when the equipment incorporates only a
REFRIGERATING SYSTEM or only a heating function or a combination of the two without
introducing additional HAZARDS described in the above dashed paragraphs then the
application of IEC 61010-2-011 or IEC 61010-2-010 or both, as applicable, shall be
considered instead of this Part 2.

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See further information in the flow chart for selection process and guidance in the

INTRODUCTION.


NOTE 102 Subclause 3.1.107 and Annex BB provides definition and requirements for protection of people who

are inside WALK-IN EQUIPMENT.

1.1.2 Equipment excluded from scope


Addition:


Add the following two new items after item j):


aa) equipment for the heating, cooling, and ventilation of laboratories;
bb) sterilizing equipment.
1.2 Object
1.2.1 Aspects included in scope
Addition:
Add two new items to the list:
aa) biohazards (see 13.101);
bb) hazardous chemical substances (see13.102).
2 Normative references
This clause of Part 1 is applicable, except as follows:
Additions:
IEC 60079-15:2010, Explosive Atmospheres – Part 15: Equipment protection by type of
protection “n”
IEC 60079-20, Explosive Atmospheres – Part 20: Material characteristics for gas and vapour
classification
IEC 60335-2-24:2010, Household and similar electrical appliances
...