Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-034: Particular requirements for measurement equipment for insulation resistance and test equipment for electric strength (IEC 61010-2-034:2017)

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 of IEC 61010 specifies safety requirements for measurement equipment for
insulation resistance and test equipment for electric strength with an output voltage exceeding
50 V a.c. or 120 V d.c.
This document also applies to combined measuring equipment which has an insulation
resistance measurement function or an electric strength test measurement function.

Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2-034: Besondere Anfordungen für Prüf- und Messgeräte zur Isolationswiderstandsmessung und Prüfausrüstung für die Spannungsfestigkeit (IEC 61010-2-034:2017)

Exigences de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-034: Exigences particulières applicables aux appareils de mesure de la résistance d'isolement et aux appareils d'essai de rigidité diélectrique (IEC 61010-2-034:2017)

L'IEC 61010-2-034:2017 La présente publication groupée de sécurité est avant tout destinée à être utilisée en tant que norme en matière de sécurité des produits pour les produits cités dans le domaine d'application. Elle doit également être utilisée par les comités d'études dans le cadre de l'élaboration de leurs publications pour des produits similaires à ceux cités dans le domaine d'application de la présente norme, conformément aux principes établis dans le Guide IEC 104 et le Guide ISO/IEC 51. L'IEC 61010-2-034:2017 spécifie les exigences de sécurité applicables aux appareils de mesure de la résistance d'isolement et aux appareils d'essai de rigidité diélectrique avec une tension de sortie supérieure à 50 V en courant alternatif ou 120 V en courant continu. Le présent document s'applique également aux appareils de mesure combinés équipés d'une fonction de mesure de la résistance d'isolement ou d'une fonction de mesure de la rigidité diélectrique. Elle a le statut de norme horizontale conformément au IEC Guide 104. Cette publication doit être lue conjointement avec l' IEC 61010-1:2010.

Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko uporabo - 2-034. del: Posebne zahteve za merilno opremo za izolacijsko upornost in preskusno opremo za električno trdnost (IEC 61010-2-034:2017)

General Information

Status
Published
Publication Date
25-May-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
28-Apr-2021
Due Date
03-Jul-2021
Completion Date
26-May-2021

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SLOVENSKI STANDARD
SIST EN IEC 61010-2-034:2021
01-julij-2021
Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko
uporabo - 2-034. del: Posebne zahteve za merilno opremo za izolacijsko upornost
in preskusno opremo za električno trdnost (IEC 61010-2-034:2017)

Safety requirements for electrical equipment for measurement, control, and laboratory

use - Part 2-034: Particular requirements for measurement equipment for insulation

resistance and test equipment for electric strength (IEC 61010-2-034:2017)

Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2

-034: Besondere Anfordungen für Prüf- und Messgeräte zur
Isolationswiderstandsmessung und Prüfausrüstung für die Spannungsfestigkeit (IEC
61010-2-034:2017)

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

laboratoire - Partie 2-034: Exigences particulières applicables aux appareils de mesure

de la résistance d'isolement et aux appareils d'essai de rigidité diélectrique (IEC 61010-2

-034:2017)
Ta slovenski standard je istoveten z: EN IEC 61010-2-034:2021
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
SIST EN IEC 61010-2-034:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61010-2-034:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 61010-2-034:2021
EUROPEAN STANDARD EN IEC 61010-2-034
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2021
ICS 19.080; 71.040.10
English Version
Safety requirements for electrical equipment for measurement,
control, and laboratory use - Part 2-034: Particular requirements
for measurement equipment for insulation resistance and test
equipment for electric strength
(IEC 61010-2-034:2017)

Exigences de sécurité pour appareils électriques de Sicherheitsbestimmungen für elektrische Mess-, Steuer-,

mesurage, de régulation et de laboratoire - Partie 2-034: Regel- und Laborgeräte - Teil 2-034: Besondere

Exigences particulières applicables aux appareils de Anfordungen für Prüf- und Messgeräte zur

mesure de la résistance d'isolement et aux appareils Isolationswiderstandsmessung und Prüfausrüstung für die

d'essai de rigidité diélectrique Spannungsfestigkeit
(IEC 61010-2-034:2017) (IEC 61010-2-034:2017)

This European Standard was approved by CENELEC on 2017-02-14. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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 61010-2-034:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61010-2-034:2021
EN IEC 61010-2-034:2021 (E)
European foreword

The text of document 66/614/FDIS, future edition 1 of IEC 61010-2-034, prepared by IEC/TC 66

"Safety of measuring, control and laboratory equipment" was submitted to the IEC-CENELEC parallel

vote and approved by CENELEC as EN IEC 61010-2-034:2021.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2022-03-15

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024-03-15

document have to be withdrawn

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 mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of

EN IEC 61010-2-034:2021/A11:2021.
Endorsement notice

The text of the International Standard IEC 61010-2-034:2017 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 61010-2-033 NOTE Harmonized as EN 61010-2-033
IEC 61557-8 NOTE Harmonized as EN 61557-8
IEC 61557-9 NOTE Harmonized as EN 61557-9
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SIST EN IEC 61010-2-034:2021
IEC 61010-2-034
Edition 1.0 2017-01
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 2-034: Particular requirements for measurement equipment for insulation
resistance and test equipment for electric strength
Exigences de sécurité pour appareils électriques de mesurage, de régulation et
de laboratoire –
Partie 2-034: Exigences particulières applicables aux appareils de mesure de la
résistance d'isolement et aux appareils d'essai de rigidité diélectrique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080, 71.040.10 ISBN 978-2-8322-3789-2

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: 5 ----------------------
SIST EN IEC 61010-2-034:2021
– 2 – IEC 61010-2-034:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope and object ............................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 8

4 Tests ............................................................................................................................... 8

5 Marking, indicators and documentation ............................................................................ 8

6 Protection against electric shock ................................................................................... 11

7 Protection against mechanical HAZARDS ......................................................................... 19

8 Resistance to mechanical stresses ................................................................................ 19

9 Protection against the spread of fire .............................................................................. 19

10 Equipment temperature limits and resistance to heat ..................................................... 19

11 Protection against HAZARDS from fluids and solid foreign objects ................................... 19

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

ultrasonic pressure ........................................................................................................ 19

13 Protection against liberated gases and substances, explosion and implosion ................ 19

14 Components and subassemblies ................................................................................... 19

15 Protection by interlocks ................................................................................................. 20

16 HAZARDS resulting from application ................................................................................ 20

17 RISK assessment ........................................................................................................... 21

101 Measuring circuits ......................................................................................................... 21

Annexes ............................................................................................................................... 27

Annex K (normative) Insulation requirements not covered by 6.7 ......................................... 27

Annex L (informative) Index of defined terms ....................................................................... 34

Annex AA (normative) Measurement categories ................................................................... 35

Annex BB (informative) HAZARDS pertaining to measurements performed in certain

environments ........................................................................................................................ 37

Annex CC (informative) 4 mm “banana” TERMINALS .............................................................. 40

Annex DD (informative) Flowchart for insulation according to the type of circuit ................... 42

Bibliography .......................................................................................................................... 45

Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents............. 13

Figure 102 – Circuit with protective screen ........................................................................... 17

Figure 103 – Circuit with DOUBLE INSULATION ......................................................................... 18

Figure AA.1 – Example to identify the locations of measuring circuits ................................... 36

Figure CC.1 – Recommended dimensions for 4 mm TERMINALS ............................................. 41

Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation ........... 44

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS

with HAZARDOUS LIVE conductive parts up to 1 000 V a.c. or 1 500 V d.c ................................ 14

Table 102 – Impulse voltages ............................................................................................... 20

Table K.101 – CLEARANCES for measuring circuits of MEASUREMENT CATEGORIES II, III

and IV ................................................................................................................................... 28

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SIST EN IEC 61010-2-034:2021
IEC 61010-2-034:2017 © IEC 2017 – 3 –

Table K.102 – Test voltages for testing electric strength of solid insulation in

measuring circuits of MEASUREMENT CATEGORY II ................................................................... 29

Table K.103 – Test voltages for testing electric strength of solid insulation in

measuring circuits of MEASUREMENT CATEGORY III .................................................................. 30

Table K.104 – Test voltages for testing electric strength of solid insulation in

measuring circuits of MEASUREMENT CATEGORY IV .................................................................. 30

Table K.105 – Test voltages for testing long term stress of solid insulation in

measuring circuits ................................................................................................................. 30

Table K.106 – Maximum TRANSIENT OVERVOLTAGES ............................................................... 33

Table AA.1 – Characteristics of MEASUREMENT CATEGORIES ................................................... 36

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SIST EN IEC 61010-2-034:2021
– 4 – IEC 61010-2-034:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –
Part 2-034: Particular requirements for measurement equipment
for insulation resistance and test equipment for electric strength
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 61010-2-034 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
66/614/FDIS 66/622/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.
---------------------- Page: 8 ----------------------
SIST EN IEC 61010-2-034:2021
IEC 61010-2-034:2017 © IEC 2017 – 5 –

This Part 2-034 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, including its amendment 1

(2016).

This Part 2-034 supplements or modifies the corresponding clauses in IEC 61010-1 so as to

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

equipment for insulation resistance and test equipment for electric strength.

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:
a) 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;

b) 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).

This publication 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, can be found on the IEC

website.

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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SIST EN IEC 61010-2-034:2021
– 6 – IEC 61010-2-034:2017 © IEC 2017
INTRODUCTION

IEC 61010-1 specifies the safety requirements that are generally applicable to all equipment

within its scope. For certain types of equipment, the requirements of IEC 61010-1 and its

amendment will be supplemented or modified by the special requirements of one, or more

than one, particular Part 2 of the standard which are read in conjunction with the Part 1

requirements.

This Part 2-034 specifies the safety requirements for measurement equipment for insulation

resistance and test equipment for electric strength which are connected to units, lines or

circuits for test or measurement purposes.

Part 2-030 specifies the safety requirements for equipment with testing or measuring circuits

which are connected for test or measurement purposes to devices or circuits outside the

measurement equipment itself.

Part 2-032 specifies the safety requirements for HAND-HELD and hand-manipulated current

sensors (see Clause 1 of Part 2-032).

Part 2-033 specifies the safety requirements for HAND-HELD MULTIMETERS and other METERS

that have a primary purpose of measuring voltage on a live MAINS.

All requirements of Part 2-030 have been included into Part 2-034. Equipment within the

scopes of both Part 2-030 and Part 2-034 are considered to be covered by the requirements

of Part 2-034.

However, for equipment within the scope of Part 2-032, Part 2-033 and Part 034, the

standards are read in conjunction.
---------------------- Page: 10 ----------------------
SIST EN IEC 61010-2-034:2021
IEC 61010-2-034:2017 © IEC 2017 – 7 –
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –
Part 2-034: Particular requirements for measurement equipment
for insulation resistance and test equipment for electric strength
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 with 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 of IEC 61010 specifies safety requirements for measurement equipment for

insulation resistance and test equipment for electric strength with an output voltage exceeding

50 V a.c. or 120 V d.c.

This document also applies to combined measuring equipment which has an insulation

resistance measurement function or an electric strength test measurement function.

1.1.2 Equipment excluded from scope
Addition:
Add the following new items to the list:

aa) IEC 61557-8 (Electrical safety in low voltage distribution systems up to 1 000 V a.c. and

1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures –

– Part 8: Insulation monitoring devices for IT systems);

bb) IEC 61557-9 (Electrical safety in low voltage distribution systems up to 1 000 V a.c. and

1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures –

Part 9: Equipment for insulation fault location in IT systems).
2 Normative references
This clause of Part 1 is applicable except as follows:
Replacement:
Replace

IEC 60364-4-44, Low-voltage electrical installations – Part 4-44: Protection for safety –

Protection against voltage disturbances and electromagnetic disturbances
with the following new reference:
---------------------- Page: 11 ----------------------
SIST EN IEC 61010-2-034:2021
– 8 – IEC 61010-2-034:2017 © IEC 2017

IEC 60364-4-44:2007, Low-voltage electrical installations – Part 4-44: Protection for safety –

Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-4-44:2007/AMD1:2015
Addition:
Add the following new normative reference:

IEC 61010-2-032, Safety requirements for electrical equipment for measurement, control, and

laboratory use – Part 2-032: Particular requirements for hand-held and hand-manipulated

current sensors for electrical test and measurement.
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
3.5 Safety terms
Replacement:
Replace the definition of 3.5.4 with the following new definition:
3.5.4
MAINS
low-voltage electricity supply system
Addition:
Add the following new definition:
3.5.101
MEASUREMENT CATEGORY

classification of testing and measuring circuits according to the type of MAINS to which they

are intended to be connected

Note 1 to entry: MEASUREMENT CATEGORIES take into account OVERVOLTAGE CATEGORIES, short-circuit current

levels, the location in the building installation where the test or measurement is to be made, and some forms of

energy limitation or transient protection included in the building installation. See Annex AA for more information.

4 Tests
This clause of Part 1 is applicable.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:
Replace the title with the following new title:
5 Marking, indicators and documentation
5.1.5 TERMINALS, connections and operating devices
Addition:
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SIST EN IEC 61010-2-034:2021
IEC 61010-2-034:2017 © IEC 2017 – 9 –
Add the following new subclause:
5.1.5.101 Measuring circuit TERMINALS
5.1.5.101.1 General

Some measuring circuit TERMINALS for the equipment within the scope of this standard also

serve as output TERMINALS.
Except as permitted in 5.1.5.101.5:

a) the value of the RATED voltage to earth of measuring circuit TERMINALS shall be marked,

and

b) the value of the RATED voltage or the RATED current, as applicable, of each pair or set of

measuring circuit TERMINALS that are intended to be used together shall be marked, and

c) the pertinent MEASUREMENT CATEGORY for each individual pair or set of measuring circuit

TERMINALS or symbol 14 of Table 1 shall be marked as specified in 5.1.5.101.2 and

5.1.5.101.3, if applicable.

Measuring circuit TERMINALS are usually supplied in pairs or sets. Each pair or set of

TERMINALS may have a RATED voltage or a RATED current, or both, within that set, and each

individual TERMINAL may have a RATED voltage to earth. For some equipment, the RATED

voltage (between TERMINALS) may be different from the RATED voltage to earth. Markings shall

be clear to avoid misunderstanding.

Symbol 14 of Table 1 shall be marked if current measuring TERMINALS are not intended for

connection to current transformers without internal protection (see 101.2).

Markings shall be placed adjacent to the TERMINALS. However, if there is insufficient space (as

in multi-input equipment), the marking may be on the RATING plate or scale plate, or the

TERMINAL may be marked with symbol 14 of Table 1.

For any set of measuring circuit TERMINALS, symbol 14 of Table 1 does not need to be marked

more than once, if it is close to the TERMINALS.

Conformity is checked by inspection and, if applicable, as specified in 5.1.5.101.2, 5.1.5.101.3

and 5.1.5.101.4, taking the exceptions in 5.1.5.101.5 into account.

5.1.5.101.2 Measuring circuit TERMINALS RATED for MEASUREMENT CATEGORIES II, III or IV

The relevant MEASUREMENT CATEGORY shall be marked for measuring circuit TERMINALS RATED

for measurements within MEASUREMENT CATEGORIES II, III or IV. The MEASUREMENT CATEGORY

markings shall be “CAT II”, “CAT III” or “CAT IV” as applicable.

Marking more than one type of MEASUREMENT CATEGORY and its RATED voltage to earth is

permissible.
Conformity is checked by inspection.

5.1.5.101.3 Measuring circuit TERMINALS RATED for connection to voltages above the

levels of 6.3.1

Symbol 14 of Table 1 shall be marked for measuring circuit TERMINALS RATED for connection to

voltages above the levels of 6.3.1, but that are not RATED for measurements within

MEASUREMENT CATEGORIES II, III or IV (see also 5.4.1 bb)).
Conformity is checked by inspection.
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SIST EN IEC 61010-2-034:2021
– 10 – IEC 61010-2-034:2017 © IEC 2017
5.1.5.101.4 HAZARDOUS LIVE output TERMINALS

Output TERMINALS of measurement equipment for insulation resistance and test equipment for

electric strength which can be HAZARDOUS LIVE shall be marked with symbol 12 of Table 1 in

close proximity to those TERMINALS.
Conformity is checked by inspection.
5.1.5.101.5 Permanently connected, dedicated or low voltage measuring circuit
TERMINALS
Measuring circuit TERMINALS do not need to be marked if:

a) they are intended to be permanently connected and not ACCESSIBLE (see 5.4.3 aa) and

bb)), or

b) they are dedicated only for connection to specific TERMINALS of other equipment, or

c) it is obvious from other indications that the RATED voltage is below the levels of 6.3.1.

NOTE Examples of acceptable indications that the inputs are intended to be below the levels of 6.3.1 include:

– the full scale deflection marking of a single-range indicating voltmeter or ammeter or maximum marking of

a multi-range multimeter;
– the maximum range marking of a voltage selector switch;

– a marked voltage or power RATING expressed in dB, mW or W, where the equivalent value, as explained in

the documentation, is below 30 V a.c.
Conformity is checked by inspection.
5.4.1 General
Addition:
Add the following new items to the list and a new paragraph:

aa) information about each relevant MEASUREMENT CATEGORY if the measuring circuit has a

RATING for MEASUREMENT CATEGORY II, III or IV (see 5.1.5.101.2);

bb) for measuring circuits that do not have a RATING for MEASUREMENT CATEGORY II, III or IV,

but could be misused by connection to such circuits, a warning not to use the equipment

for measurements on MAINS, and a detailed RATING including TRANSIENT OVERVOLTAGES

(see AA.2.4 for more information).

Some equipment may have multiple MEASUREMENT CATEGORY RATINGS for the same measuring

circuit. For such equipment, the documentation shall clearly identify the MEASUREMENT

CATEGORIES where the equipment is intended to be used and where it must not be used.

5.4.3 Equipment installation
Addition:
Add the following
...

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