IEC 61010-2-034:2023

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 61010-2-034:2023 specifies safety requirements to equipment for measuring insulation resistance and to equipment for testing electric strength which have 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. This document has the status of a horizontal publication in accordance with IEC Guide 108. It has the status of a group safety publication in accordance with IEC Guide 104. This second edition cancels and replaces the first edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) in 1.2.1, requirements for protection against hazards which could occur from reading a voltage have been added to the scope;
b) Clause 2, all normative references have been dated; new normative references have been added;
c) in 4.3.2.5, requirements for power supply have been modified;
d) in 4.3.2.6, requirements for inputs/outputs have been modified;
e) in 5.1.5.101.2, minimum ratings for voltage of measuring terminals are required;
f) in 5.4.2, new ratings for documentation have been added;
g) in 5.4.4, new instructions for operation have been added;
h) in 5.101.1, hazard indicators shall be functional in normal condition and in single fault condition;
i) in 6.6.101.1, insulating material of group I may be allowed for determination of creepage distances of measuring circuit terminals;
j) in 6.6.101.2, Clearances and creepage distances above 1 000 V a.c. and 1 500 V d.c. for measuring circuit terminals in unmated position have been defined;
k) in 6.6.101.3, requirements for measuring circuit terminals in partially mated position have been specified;
l) in 6.6.101.4, requirements for measuring circuit terminals in mated position have been specified;
m) Subclause 6.102 replaces 6.9.103 and has been rephrased;
n) new Subclause 9.101 to consider the protection of measuring circuits against the spread of fire and arc flash has been added. Table 102 has been replaced by Table K.101;
o) In 9.101.2, relocation of 101.3 of previous edition;
p) In 9.101.3, relocation of 101.4 of previous edition, extension to measurement category II and reference to IEC 61000-4-5 for tests;
q) in 9.101.4, requirements for measuring circuit terminals in mated position have been specified;
r) in 9.101.5, relocation of K.103 of previous edition with numerous technical changes;
s) in 14.101, relocation of 14.102. 14.101 of previous edition has been removed;
t) in 101.3, relocation of 101.5 of previous edition, and more requirements added against hazard occurring from reading a voltage value;
u) in K.2.1, another method for determination of clearances of secondary circuits is proposed;
v) in K.3.2, new Table K.15 and Table K.16 for clearance calculation;
w) in K.3.101, relocation of 6.9.104 of previous edition;
x) in K.101.4.1, new Table K.103 and Table K.104 replace Table K.102, Table K.103 and Table K.104;
y) in K.101.4, the subclause has been reviewed. Tables and tests for solid insulation have been modified. Table K.105 replaces Table K.9;
z) Table K.101, replacement of Table K.106;
aa) Clause K.4, redraft of the clause to propose a method for determination of Ut for circuits which reduce transient overvoltages;
bb) Annex EE: addition of a new informative annex for determination of clearances for Table 101.

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

L'IEC 61010-2-034:2023 spécifie les exigences de sécurité pour les appareils de mesure de la résistance d’isolement et les 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 d’essai de rigidité diélectrique. Ce document a le statut d'une publication horizontale conformément au Guide 108 de l'IEC. Il a le statut d’une publication groupée de sécurité conformément au Guide IEC 104. Cette deuxième édition annule et remplace la première édition parue en 2017. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) au paragraphe 1.2.1, les exigences relatives à la protection contre les dangers susceptibles de survenir lors de la lecture d’une tension ont été ajoutées au domaine d’application;
b) à l’Article 2, toutes les références normatives ont été datées et de nouvelles références normatives ont été ajoutées;
c) au paragraphe 4.3.2.5, les exigences relatives à l’alimentation électrique ont été modifiées;
d) au paragraphe 4.3.2.6, les exigences relatives aux entrées/sorties ont été modifiées;
e) au paragraphe 5.1.5.101.2, des valeurs assignées minimales de tension des bornes des circuits de mesure sont exigées;
f) au paragraphe 5.4.2, de nouvelles valeurs assignées pour la documentation ont été ajoutées;
g) au paragraphe 5.4.4, de nouvelles instructions de fonctionnement ont été ajoutées;
h) au paragraphe 5.101.1, les indicateurs de danger doivent être fonctionnels en condition normale et en condition de premier défaut;
i) au paragraphe 6.6.101.1, les matériaux isolants du groupe I peuvent être admis pour la détermination des lignes de fuite des bornes des circuits de mesure;
j) au paragraphe 6.6.101.2, les distances d’isolement et les lignes de fuite supérieures à 1 000 V en courant alternatif et à 1 500 V en courant continu pour les bornes des circuits de mesure en position découplée ont été définies;
k) au paragraphe 6.6.101.3, les exigences relatives aux bornes des circuits de mesure en position partiellement couplée ont été spécifiées;
l) au paragraphe 6.6.101.4, les exigences relatives aux bornes des circuits de mesure en position couplée ont été spécifiées;
m) le paragraphe 6.102 remplace le paragraphe 6.9.103 et a été reformulé;
n) un nouveau paragraphe 9.101 a été ajouté pour prendre en compte la protection des circuits de mesure contre la propagation du feu et les arcs électriques. Le Tableau 102 a été remplacé par le Tableau K.101;
o) le paragraphe 101.3 de l’édition précédente a été déplacé au paragraphe 9.101.2;
p) le paragraphe 101.4 de l’édition précédente a été déplacé au paragraphe 9.101.3. Ce paragraphe a été étendu à la catégorie de mesure II et fait référence à l’IEC 61000‑4-5 pour les essais;
q) au paragraphe 9.101.4, les exigences relatives aux bornes des circuits de mesure en position couplée ont été spécifiées;
r) le paragraphe K.103 de l’édition précédente a été déplacé au paragraphe 9.101.5 et inclut de nombreuses modifications techniques;
s) le paragraphe 14.101 de l’édition précédente a été supprimé et le paragraphe 14.102 de l’édition précédente a été déplacé au paragraphe 14.101;
t) le paragraphe 101.5 de l’édition précédente a été déplacé au paragraphe 101.3 et des exigences supplémentaires ont été ajoutées contre les dangers liés à la lecture d’une valeur de tension;
u) au paragraphe K.2.1, une autre méthode de détermination des distances d’isolement des circuits secondaires a été proposée;
v) au paragraphe K.3.2, le Tableau K.15 et le Tableau K.16 ont été modifiés pour le calcul de la distance d’isolement;
w) le paragraphe 6.9.104 de l’édition précédente a été déplacé au paragraphe K.3.101;
x) au paragraphe K.101.4.1, les nouveaux Tableau

General Information

• Status: Published
• Publication Date: 16-Jul-2023
• ICS: 19.080 - Electrical and electronic testing
• ICS: 71.040.10 - Chemical laboratories. Laboratory equipment
• Technical Committee: TC 66 - Safety of measuring, control and laboratory equipment
• Drafting Committee: WG 2 - TC 66/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 17-Jul-2023
• Completion Date: 05-May-2023

Relations

• Revises: 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
• Effective Date: 05-Sep-2023

Overview

IEC 61010-2-034:2023 is the IEC group safety publication that defines safety requirements for measurement equipment for insulation resistance and test equipment for electric strength. It applies to equipment with output voltages exceeding 50 V a.c. or 120 V d.c., including combined instruments that perform insulation resistance measurements or electric-strength tests. This second edition (2023) updates and replaces the 2017 edition and is aligned with IEC Guide 108 and IEC Guide 104.

Keywords: IEC 61010-2-034:2023, insulation resistance measurement, electric strength test equipment, safety requirements, measuring equipment

Key topics and technical requirements

• Scope & verification: Defines which devices are included/excluded, environmental conditions, and verification procedures.
• Protection against electric shock: Requirements for basic, supplementary and reinforced insulation; limits for accessible parts; and protective bonding.
• Measuring circuit terminals: New and revised requirements for clearances and creepage distances in unmated, partially mated, and mated positions, including tables and new calculation methods.
• Hazard indicators & single-fault condition: Hazard indicators must remain functional in normal and single-fault conditions; tests and sequences for single-fault scenarios are specified.
• Power supply and I/O: Updated requirements for internal power supplies, inputs/outputs and protection against unintended or automatic energising of outputs.
• Marking & documentation: New ratings, documentation and operation instructions requirements to ensure safe use and clear manufacturer information.
• Construction and testing: Voltage test procedures, insulating materials, discharging residual voltages, and limits for accessible voltages and currents.
• Fire and arc-flash protection: New subclauses addressing protection against spread of fire and arc flash in measuring circuits.
• Normative references & alignment: All normative references dated; cross-references to IEC 61010-1 and to EMC/lightning tests such as IEC 61000-4-5 where relevant.

Keywords: clearances, creepage distances, hazard indicator, single fault condition, arc flash, documentation

Applications and who uses this standard

• Manufacturers of insulation resistance testers, high-voltage dielectric (hipot) testers, and combined test/measurement instruments.
• Design and safety engineers responsible for compliance of laboratory and production test equipment.
• Test laboratories, certification bodies, and procurement teams evaluating equipment safety.
• Regulatory and compliance professionals creating safety documentation, manuals and markings.

Practical value: ensures equipment design minimizes electric-shock and fire/arc risks, provides test methods for type and single-fault conditions, and standardizes user instructions and ratings.

Related standards

• IEC 61010-1 (general requirements for electrical equipment for measurement, control, and laboratory use) - referenced and included in extended version.
• IEC 61000-4-5 (surge immunity) - referenced for certain measurement-category tests.
• IEC Guide 108 and IEC Guide 104 (publication status and group safety considerations).

Keywords: IEC 61010-1, IEC 61000-4-5, safety standard, laboratory equipment

For procurement, compliance checks or technical design, IEC 61010-2-034:2023 is the authoritative reference for safe design and use of insulation resistance and electric-strength test equipment.

Standards Content (Sample)

IEC 61010-2-034 ®
Edition 2.0 2023-07
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 61010-2-034:2023 includes the content of the references made to
IEC 61010-1:2010 and IEC 61010-1:2010/AMD1:2016

GROUP SAFETY PUBLICATION
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

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 61010-2-034 ®
Edition 2.0 2023-07
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 61010-2-034:2023 includes the content of the references made to
IEC 61010-1:2010 and IEC 61010-1:2010/AMD1:2016
GROUP SAFETY PUBLICATION
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.080; 71.040.10 ISBN 978-2-8322-7284-8

TC 66/Publication 61010-1 (2010), Third edition/I-SH 01
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 1: General requirements
INTERPRETATION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 66: Safety of
measuring, control and laboratory equipment.
The text of this interpretation sheet is based on the following documents:
ISH Report on voting
66/497A/ISH 66/505/RVD
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
___________
IEC 61010-1:2010 contains a requirement in 6.8.3.1 pertaining to voltage testers for type tests
as follows:
“The generator shall be able to supply a power of at least 500 VA.”
This has given rise to the following questions:
How does one interpret the requirement for voltage testers in 6.8.3.1 of IEC 61010-1:2010?
Specifically, this subclause requires that “The generator shall be able to supply a power of at
least 500 VA.” Does this requirement apply throughout the rated output range of the voltage
tester? What is meant by the word “generator”? Is the “generator” the power supply within the
voltage tester, or the voltage tester output, or something else?
Interpretation:
“A voltage tester used for type tests must be able to deliver at least 500 VA at its full-rated
output voltage. It does not necessarily need to deliver 500 VA if set for lower voltages.
For example, a voltage tester that can deliver 100 mA at any test output voltage up to 5 000 V
(and a current corresponding to 500 VA above 5 000 V) would meet the requirement.
The requirements for voltage testers used for routine (production line) tests are included in
Annex F. The requirements of 6.8.3.1 do not apply to these voltage testers.”

February 2013 ICS 19.080, 71.040.10 French text overleaf

– 2 – IEC 61010-2-034:2023 EXV © IEC 2023
CONTENTS
FOREWORD . 11
INTRODUCTION to IEC 61010-1:2010 and IEC 61010 1:2010/AMD1:2016 . 15
INTRODUCTION . 16
1 Scope and object . 17
1.1 Scope . 17
1.1.1 Equipment included in scope . 17
1.1.2 Equipment excluded from scope . 17
1.1.3 Computing equipment . 18
1.2 Object . 18
1.2.1 Aspects included in scope . 18
1.2.2 Aspects excluded from scope . 18
1.3 Verification . 18
1.4 Environmental conditions . 19
1.4.1 Normal environmental conditions . 19
1.4.2 Extended environmental conditions . 19
2 Normative references . 19
3 Terms and definitions . 22
3.1 Equipment and states of equipment . 22
3.2 Parts and accessories . 22
3.3 Quantities . 23
3.4 Tests . 23
3.5 Safety terms . 24
3.6 Insulation . 25
4 Tests . 27
4.1 General . 27
4.2 Sequence of tests. 27
4.3 Reference test conditions . 27
4.3.1 Environmental conditions . 27
4.3.2 State of equipment . 28
4.4 Testing in SINGLE FAULT CONDITION . 29
4.4.1 General . 29
4.4.2 Application of fault conditions . 30
4.4.3 Duration of tests . 32
4.4.4 Conformity after application of fault conditions . 32
5 Marking and documentation . 33
5.1 Marking . 33
5.1.1 General . 33
5.1.2 Identification . 33
5.1.3 MAINS supply . 34
5.1.4 Fuses . 35
5.1.5 TERMINALS, connections and operating devices . 36
5.1.6 Switches and circuit-breakers . 38
5.1.7 Equipment protected by DOUBLE INSULATION or REINFORCED
INSULATION . 38
5.1.8 Field-wiring TERMINAL boxes . 38
5.2 Warning markings . 39

5.3 Durability of markings . 39
5.4 Documentation . 39
5.4.1 General . 39
5.4.2 Equipment RATINGS . 40
5.4.3 Equipment installation . 41
5.4.4 Equipment operation . 41
5.4.5 Equipment maintenance and service . 42
5.4.6 Integration into systems or effects resulting from special conditions . 43
5.101 HAZARD indicator . 43
5.101.1 General . 43
5.101.2 HAZARD indicator light for fixed equipment . 43
6 Protection against electric shock . 44
6.1 General . 44
6.1.1 Requirements . 44
6.1.2 Exceptions . 44
6.2 Determination of ACCESSIBLE parts . 44
6.2.1 General . 44
6.2.2 Examination. 45
6.2.3 Openings above parts that are HAZARDOUS LIVE. 45
6.2.4 Openings for pre-set controls. 45
6.3 Limit values for ACCESSIBLE parts . 46
6.3.1 Levels in NORMAL CONDITION . 46
6.3.2 Levels in SINGLE FAULT CONDITION . 46
6.4 Primary means of protection . 49
6.4.1 General . 49
6.4.2 ENCLOSURES and PROTECTIVE BARRIERS . 49
6.4.3 BASIC INSULATION . 49
6.4.4 Impedance . 49
6.5 Additional means of protection in case of SINGLE FAULT CONDITIONS . 49
6.5.1 General . 49
6.5.2 PROTECTIVE BONDING . 50
6.5.3 SUPPLEMENTARY INSULATION and REINFORCED INSULATION . 54
6.5.4 PROTECTIVE IMPEDANCE . 55
6.5.5 Automatic disconnection of the supply . 55
6.5.6 Current- or voltage-limiting device . 55
6.6 Connections to external circuits . 56
6.6.1 General . 56
6.6.2 TERMINALS for external circuits . 56
6.6.3 Circuits with TERMINALS which are HAZARDOUS LIVE . 56
6.6.4 TERMINALS for stranded conductors . 56
6.6.101 Measuring circuit TERMINALS . 57
6.7 Insulation requirements . 59
6.7.1 The nature of insulation . 59
6.7.2 Insulation for MAINS CIRCUITS of OVERVOLTAGE CATEGORY II with a
nominal supply voltage up to 300 V . 62
6.7.3 Insulation for secondary circuits derived from MAINS CIRCUITS of
OVERVOLTAGE CATEGORY II up to 300 V . 65
6.8 Procedure for voltage tests . 71
6.8.1 General . 71

– 4 – IEC 61010-2-034:2023 EXV © IEC 2023
6.8.2 Humidity preconditioning . 72
6.8.3 Test procedures . 73
6.9 Constructional requirements for protection against electric shock . 74
6.9.1 General . 74
6.9.2 Insulating materials . 74
6.9.3 Colour coding . 74
6.10 Connection to the MAINS supply source and connections between parts of
equipment . 74
6.10.1 MAINS supply cords . 74
6.10.2 Fitting of non-detachable MAINS supply cords . 75
6.10.3 Plugs and connectors . 77
6.11 Disconnection from supply source . 77
6.11.1 General . 77
6.11.2 Exceptions . 77
6.11.3 Requirements according to type of equipment . 78
6.11.4 Disconnecting devices . 78
6.101 Protection against HAZARDOUS LIVE outputs . 79
6.101.1 Insulation between MAINS CIRCUITS and output circuits . 79
6.101.2 Protection against unintended energising of the outputs . 79
6.101.3 Protection against automatic energising of the outputs . 79
6.102 Discharging residual voltages . 80
6.102.1 General . 80
6.102.2 d.c. voltage tests . 80
6.102.3 a.c. voltage tests . 80
7 Protection against mechanical HAZARDS . 81
7.1 General . 81
7.2 Sharp edges . 81
7.3 Moving parts . 81
7.3.1 General . 81
7.3.2 Exceptions . 82
7.3.3 RISK assessment for mechanical HAZARDS to body parts . 82
7.3.4 Limitation of force and pressure . 83
7.3.5 Gap limitations between moving parts . 84
7.4 Stability . 86
7.5 Provisions for lifting and carrying . 87
7.5.1 General . 87
7.5.2 Handles and grips . 87
7.5.3 Lifting devices and supporting parts. 87
7.6 Wall mounting . 87
7.7 Expelled parts . 88
8 Resistance to mechanical stresses . 88
8.1 General . 88
8.2 ENCLOSURE rigidity tests . 89
8.2.1 Static test . 89
8.2.2 Impact test . 89
8.3 Drop test . 90
8.3.1 Equipment other than HAND-HELD EQUIPMENT and DIRECT PLUG-IN
EQUIPMENT . 90
8.3.2 HAND-HELD EQUIPMENT and DIRECT PLUG-IN EQUIPMENT . 91

9 Protection against the spread of fire . 91
9.1 General . 91
9.2 Eliminating or reducing the sources of ignition within the equipment . 93
9.3 Containment of fire within the equipment, should it occur . 93
9.3.1 General . 93
9.3.2 Constructional requirements . 93
9.4 Limited-energy circuit . 96
9.5 Requirements for equipment containing or using flammable liquids . 97
9.6 Overcurrent protection . 97
9.6.1 General . 97
9.6.2 PERMANENTLY CONNECTED EQUIPMENT . 98
9.6.3 Other equipment . 98
9.101 Protection of measuring circuits . 98
9.101.1 General . 98
9.101.2 Protection against mismatches of inputs and ranges . 99
9.101.3 Protection against MAINS overvoltages . 101
9.101.4 Protection against extraneous voltages from distribution system. 102
9.101.5 Protection against currents and voltages induced by the environment . 102
10 Equipment temperature limits and resistance to heat . 104
10.1 Surface temperature limits for protection against burns . 104
10.2 Temperatures of windings . 105
10.3 Other temperature measurements . 105
10.4 Conduct of temperature tests . 105
10.4.1 General . 105
10.4.2 Temperature measurement of heating equipment . 106
10.4.3 Equipment intended for installation in a cabinet or a wall . 106
10.5 Resistance to heat. 106
10.5.1 Integrity of CLEARANCES and CREEPAGE DISTANCES . 106
10.5.2 Non-metallic ENCLOSURES . 106
10.5.3 Insulating material . 107
11 Protection against HAZARDS from fluids and solid foreign objects . 108
11.1 General . 108
11.2 Cleaning . 108
11.3 Spillage . 108
11.4 Overflow . 108
11.5 Battery electrolyte . 109
11.6 Equipment RATED with a degree of ingress protection (IP code) . 109
11.6.1 General . 109
11.6.2 Conditions for testing . 109
11.6.3 Protection against solid foreign objects (including dust) . 110
11.6.4 Protection against water . 110
11.7 Fluid pressure and leakage . 110
11.7.1 Maximum pressure . 110
11.7.2 Leakage and rupture at high pressure . 111
11.7.3 Leakage from low-pressure parts . 112
11.7.4 Overpressure safety device . 112
12 Protection against radiation, including laser sources, and against sonic and

ultrasonic pressure . 113
12.1 General . 113

– 6 – IEC 61010-2-034:2023 EXV © IEC 2023
12.2 Equipment producing ionizing radiation . 113
12.2.1 Ionizing radiation . 113
12.2.2 Accelerated electrons . 114
12.3 Optical radiation . 114
12.4 Microwave radiation . 115
12.5 Sonic and ultrasonic pressure . 115
12.5.1 Sound level . 115
12.5.2 Ultrasonic pressure. 116
12.6 Laser sources . 116
13 Protection against liberated gases and substances, explosion and implosion . 117
13.1 Poisonous and injurious gases and substances . 117
13.2 Explosion and implosion . 117
13.2.1 Components . 117
13.2.2 Batteries and battery charging . 117
13.2.3 Implosion of cathode ray tubes . 118
14 Components and subassemblies . 118
14.1 General . 118
14.2 Motors . 119
14.2.1 Motor temperatures . 119
14.2.2 Series excitation motors . 119
14.3 Overtemperature protection devices . 120
14.4 Fuse holders . 120
14.5 MAINS voltage selection devices . 120
14.6 MAINS transformers tested outside equipment . 120
14.7 Printed wiring boards . 121
14.8 Circuits used to limit TRANSIENT OVERVOLTAGES . 121
14.101Probe assemblies and accessories . 121
15 Protection by interlocks . 122
15.1 General . 122
15.2 Prevention of reactivating . 122
15.3 Reliability . 122
16 HAZARDS resulting from application . 122
16.1 REASONABLY FORESEEABLE MISUSE . 122
16.2 Ergonomic aspects . 122
17 RISK assessment . 123
101 Measuring circuits . 123
101.1 General . 123
101.2 Current measuring circuits . 124
101.3 Indicating devices . 124
101.3.1 General . 124
101.3.2 Battery level . 124
101.3.3 Over-range indication . 125
101.3.4 Permanent overvoltages . 125
Annex A (normative) Measuring circuits for touch current (see 6.3) . 127
Annex B (normative) Standard test fingers (see 6.2) . 130
Annex C (normative) Measurement of CLEARANCES and CREEPAGE DISTANCES . 132
Annex D (normative) Parts between which insulation requirements are specified (see

6.4 and 6.5.3) . 136

Annex E (informative) Guideline for reduction of POLLUTION DEGREES . 139
Annex F (normative) ROUTINE TESTS . 140
Annex G (informative) Leakage and rupture from fluids under pressure . 142
Annex H (normative) Qualification of conformal coatings for protection against
POLLUTION . 147
Annex I (informative) Line-to-neutral voltages for common MAINS supply systems . 150
Annex J (informative) RISK assessment . 152
Annex K (normative) Insulation requirements not covered by 6.7 . 155
Annex L (informative) Index of defined terms . 184
Annex AA (normative) Measurement categories . 186
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 189
Annex CC (informative) 4 mm "banana" TERMINALS . 192
Annex DD (informative) Flowchart for insulation according to the type of circuit . 194
Annex EE (informative) Determination of CLEARANCES for Table 101 . 197
Bibliography . 198

ENCLOSURES . 45
Figure 1 – Measurements through openings in
Figure 2 – Maximum duration of short-term ACCESSIBLE voltages in SINGLE FAULT
CONDITION (see 6.3.2 a)) . 47
Figure 3 – Capacitance level versus voltage in NORMAL CONDITION and SINGLE FAULT
CONDITION (see 6.3.1 c) and 6.3.2 c)) . 48
Figure 4 – Acceptable arrangement of protective means against electric shock . 50
Figure 5 – Examples of binding screw assemblies . 52
Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents. 54
Figure 6 – Distance between conductors on an interface between two layers . 64
Figure 7 – Distance between adjacent conductors along an interface of two inner

layers. 64
Figure 8 – Distance between adjacent conductors located between the same two
layers. 65
Figure 9 – Detachable MAINS supply cords and connections . 75
Figure 10 – Impact test using a sphere . 90
Figure 11 – Flow chart to explain the requirements for protection against
the spread of fire . 92
Figure 12 – Baffle . 95
Figure 13 – Area of the bottom of an ENCLOSURE to be constructed as specified in
9.3.2 c) 1) . 95
Figure 102 – Test circuit for induced voltage and current . 103
Figure 14 – Ball-pressure test apparatus. 107
Figure 16 – Ratio between test pressure and maximum working pressure . 112
Figure 15 – Flow chart for conformity options 14.1 a), b), c) and d) . 119
Figure A.1 – Measuring circuit for a.c. with frequencies up to 1 MHz and for d.c. . 127
Figure A.2 – Measuring circuits for sinusoidal a.c. with frequencies up to 100 Hz and
for d.c. . 128
Figure A.3 – Current measuring circuit for electrical burns . 129
Figure A.4 – Current measuring circuit for wet contact . 129

– 8 – IEC 61010-2-034:2023 EXV © IEC 2023
Figure B.1 – Rigid test finger . 130
Figure B.2 – Jointed test finger . 131
Figure C.1 – Examples of methods of measuring CLEARANCES and CREEPAGE DISTANCES . 135
Figures D.1a) to d) – Protection between HAZARDOUS LIVE circuits and ACCESSIBLE
parts . 137
Figures D.1e) to h) – Protection between HAZARDOUS LIVE circuits and circuits with
ACCESSIBLE external TERMINALS . 137
Figures D.2 a) and D.2 b) – Protection between a HAZARDOUS LIVE internal circuit and
an ACCESSIBLE part which is not bonded to other ACCESSIBLE parts . 138
Figures D.2 c) and D.2 d) – Protection between a HAZARDOUS LIVE primary circuit and
circuits which have ACCESSIBLE external TERMINALS . 138
Figure D.3 – Protection of external ACCESSIBLE TERMINALS of two HAZARDOUS LIVE
circuits . 138
Figure G.1 – Conformity verification process (see G.2) . 143
Figure H.1 – Test sequence and conformity . 149
Figure J.1 – Iterative process of RISK assessment and RISK reduction . 152
Figure J.2 – RISK reduction . 153
Figure K.1 – Distance between conductors on an interface between two layers . 159
Figure K.2 – Distance between adjacent conductors along an interface of an inner
layer . 160
Figure K.3 – Distance between adjacent conductors located between the same two
layers. 161
Figure K.4 – Example of recurring peak voltage . 173
Figure K.101 – Circuit with protective screen . 175
Figure K.102 – Circuit with DOUBLE INSULATION . 176
Figure K.103 – Test circuit for evaluation of TRANSIENT OVERVOLTAGE attenuation . 178
Figure AA.1 – Example to identify the locations of MEASUREMENT CATEGORIES . 187
Figure CC.1 – Recommended dimensions of 4 mm TERMINALS . 193
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 196

Table 1 – Symbols . 35
Table 2 – Tightening torque for binding screw assemblies . 52
Table 101 – CLEARANCES for unmated measuring circuit TERMINALS. 58
Table 3 – Multiplication factors for CLEARANCES of equipment RATED for operation at
altitudes up to 5 000 m . 60
TABLE 4 – CLEARANCES and CREEPAGE DISTANCES for MAINS CIRCUITS of OVERVOLTAGE
CATEGORY II up to 300 V . 62
Table 5 – Test voltages for solid insulation in MAINS CIRCUITS of OVERVOLTAGE
CATEGORY II up to 300 V . 63
Table 6 – CLEARANCES and test voltages for secondary circuits derived from MAINS
CIRCUITS of OVERVOLTAGE CATEGORY II up to 300 V. 66
Table 7 – CREEPAGE DISTANCES for secondary circuits . 68
Table 8 − Minimum values for distance or thickness (see 6.7.3.4.2 to 6.7.3.4.4) . 70
Table 9 – Distances between TERMINALS and foil . 71
Table 10 – Correction factors according to test site altitude for test voltages for
CLEARANCES . 72
Table 11 – Values for physical tests on cord anchorages . 76

Table 12 – Protective measures against mechanical HAZARDS to body parts . 83
Table 13 – Minimum maintained gaps to prevent crushing for different body parts . 85
Table 14 – Maximum gaps to prevent access for different body parts . 86
Table 15 – Impact energy levels, test height and corresponding IK codes . 90
Table 16 – Acceptable perforation of the bottom of an ENCLOSURE . 94
Table 17 – Limits of maximum available current . 96
Table 18 – Values for overcurrent protection device
...

IEC 61010-2-034 ®
Edition 2.0 2023-07
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 2-034: 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

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IEC 61010-2-034 ®
Edition 2.0 2023-07
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 2-034: 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 978-2-8322-6737-0

– 2 – IEC 61010-2-034:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope and object . 8
2 Normative references . 9
3 Terms and definitions . 10
4 Tests . 10
5 Marking, documentation and HAZARD indicator . 11
6 Protection against electric shock . 15
7 Protection against mechanical HAZARDS . 22
8 Resistance to mechanical stresses . 22
9 Protection against the spread of fire and arc flash . 22
10 Equipment temperature limits and resistance to heat . 28
11 Protection against HAZARDS from fluids and solid foreign objects . 28
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 28
13 Protection against liberated gases and substances, explosion and implosion . 28
14 Components and subassemblies . 28
15 Protection by interlocks . 28
16 HAZARDS resulting from application . 28
17 RISK assessment . 28
101 Measuring circuits . 29
Annexes . 32
Annex K (normative) Insulation requirements not covered by 6.7 . 32
Annex L (informative) Index of defined terms . 46
Annex AA (normative) MEASUREMENT CATEGORIES . 47
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 50
Annex CC (informative) 4 mm "banana" TERMINALS . 53
Annex DD (informative) Flowchart for insulation according to the type of circuit . 55
Annex EE (informative) Determination of CLEARANCES for Table 101 . 58
Bibliography . 59

Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents. 16
Figure 102 – Test circuit for induced voltage and current . 27
Figure K.101 – Circuit with protective screen . 36
Figure K.102 – Circuit with DOUBLE INSULATION . 37
Figure K.103 – Test circuit for evaluation of TRANSIENT OVERVOLTAGE attenuation . 40
Figure AA.1 – Example to identify the locations of MEASUREMENT CATEGORIES . 48
Figure CC.1 – Recommended dimensions of 4 mm TERMINALS . 54
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 57

Table 101 – CLEARANCES for unmated measuring circuit TERMINALS. 17

Table K.15 – CLEARANCE values for the calculation of K.3.2 . 33
Table K.16 – Test voltages based on CLEARANCES . 34
Table K.101 – Impulse voltages for circuits connected to MAINS . 39
Table K.102 – CLEARANCES for measuring circuits RATED for MEASUREMENT CATEGORIES . 41
Table K.103 – Impulse test voltages for testing electric strength of solid insulation for
measuring circuits RATED for MEASUREMENT CATEGORIES . 42
Table K.104 – a.c. test voltages for testing electric strength of solid insulation for
RATED for MEASUREMENT CATEGORIES . 42
measuring circuits
Table K.105 – Minimum values for distance or thickness of solid insulation for
measuring circuits RATED for MEASUREMENT CATEGORIES . 44
Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 49
Table EE.1 – CLEARANCES values for Table 101 . 58

– 4 – IEC 61010-2-034:2023 © IEC 2023
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.
IEC 61010-2-034 has been prepared by IEC technical committee 66: Safety of measuring,
control and laboratory equipment. It is an International Standard.
It has the status of a group safety publication in accordance with IEC Guide 104.
This second edition cancels and replaces the first edition published in 2017. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) in 1.2.1, requirements for protection against HAZARDS which could occur from reading a
voltage have been added to the scope;
b) Clause 2, all normative references have been dated; new normative references have been
added;
c) in 4.3.2.5, requirements for power supply have been modified;
d) in 4.3.2.6, requirements for inputs/outputs have been modified;
e) in 5.1.5.101.2, minimum RATINGS for voltage of measuring TERMINALS are required;
f) in 5.4.2, new RATINGS for documentation have been added;
g) in 5.4.4, new instructions for operation have been added;
h) in 5.101.1, HAZARD indicators shall be functional in NORMAL CONDITION and in SINGLE FAULT
CONDITION;
i) in 6.6.101.1, insulating material of group I may be allowed for determination of CREEPAGE
DISTANCES of measuring circuit TERMINALS;
LEARANCES and CREEPAGE DISTANCES above 1 000 V a.c. and 1 500 V d.c. for
j) in 6.6.101.2, C
measuring circuit TERMINALS in unmated position have been defined;
k) in 6.6.101.3, requirements for measuring circuit TERMINALS in partially mated position have
been specified;
l) in 6.6.101.4, requirements for measuring circuit TERMINALS in mated position have been
specified;
m) Subclause 6.102 replaces 6.9.103 and has been rephrased;
n) new Subclause 9.101 to consider the protection of measuring circuits against the spread of
fire and arc flash has been added. Table 102 has been replaced by Table K.101;
o) In 9.101.2, relocation of 101.3 of previous edition;
p) In 9.101.3, relocation of 101.4 of previous edition, extension to MEASUREMENT CATEGORY II
and reference to IEC 61000-4-5 for tests;
q) in 9.101.4, requirements for measuring circuit TERMINALS in mated position have been
specified;
r) in 9.101.5, relocation of K.103 of previous edition with numerous technical changes;
s) in 14.101, relocation of 14.102. 14.101 of previous edition has been removed;
t) in 101.3, relocation of 101.5 of previous edition, and more requirements added against
HAZARD occurring from reading a voltage value;
u) in K.2.1, another method for determination of CLEARANCES of secondary circuits is proposed;
v) in K.3.2, new Table K.15 and Table K.16 for CLEARANCE calculation;
w) in K.3.101, relocation of 6.9.104 of previous edition;
x) in K.101.4.1, new Table K.103 and Table K.104 replace Table K.102, Table K.103 and
Table K.104;
y) in K.101.4, the subclause has been reviewed. Tables and tests for solid insulation have
been modified. Table K.105 replaces Table K.9;
z) Table K.101, replacement of Table K.106;
for circuits
aa) Clause K.4, redraft of the clause to propose a method for determination of U
t
which reduce TRANSIENT OVERVOLTAGE;
bb) Annex EE: addition of a new informative annex for determination of CLEARANCES for
Table 101.
The text of this International Standard is based on the following documents:
Draft Report on voting
66/778/FDIS 66/784/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

– 6 – IEC 61010-2-034:2023 © IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
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.
This document is to be used in conjunction with IEC 61010-1:2010 and
IEC 61010-1:2010/AMD1:2016.
This document 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 IEC 61010-1 is not mentioned in this document, that subclause
applies as far as is reasonable. Where this document states "addition", "modification",
"replacement", or "deletion", the relevant requirement, test specification or note in IEC 61010-1
should be adapted accordingly.
In this standard:
• the following print types are used:
– requirements: in roman type;
– NOTES: in small roman type;
– conformity and tests: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL ROMAN
CAPITALS;
• subclauses, figures, tables and notes which are additional to those in IEC 61010-1 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 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.
IMPORTANT – The "colour inside" logo on the cover page of this document 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.

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
standard from the IEC 61010-2 series which is/are read in conjunction with the requirements of
IEC 61010-1.
1) IEC 61010-2-030 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.
2) IEC 61010-2-032 specifies the safety requirements for hand-held and hand-manipulated
current sensors for measuring, detecting or injecting current, or indicating current
waveforms on circuits without physically opening the current path of the circuit being
measured.
Most of the requirements of IEC 61010-2-030 have been included in
IEC 61010-2-032. Equipment within the scopes of both IEC 61010-2-030 and IEC 61010-2-
032 are considered to be covered by the requirements of IEC 61010-2-032.
However, for current sensors in combined equipment with protective bonding and automatic
disconnection of the supply, IEC 61010-2-030 and IEC 61010-2-032 are read in conjunction.
3) IEC 61010-2-033 specifies the safety requirements for hand-held multimeters and other
meters for domestic and professional use, capable of measuring mains voltage, intended to
measure voltage and other electrical quantities such as resistance or current.
All relevant requirements of IEC 61010-2-030 have been included in
IEC 61010-2-033.
4) This document 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.
All relevant requirements of IEC 61010-2-030 have been included in this document.
However, for equipment within the scope of IEC 61010-2-032 and of this document, these
standards are read in conjunction.
IEC 61010-031 specifies the safety requirements for hand-held and hand-manipulated probe
assemblies and their related accessories intended to be used in particular with equipment in
the scope of IEC 61010-2-030, IEC 61010-2-032, IEC 61010-2-033 and this document. These
probe assemblies are for non-contact or direct electrical connection between a part and
electrical test and measurement equipment. They may be fixed to the equipment or be
detachable accessories for the equipment.

– 8 – IEC 61010-2-034:2023 © IEC 2023
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
IEC 61010-1:2010, Clause 1 and IEC 61010-1:2010/AMD1:2016, Clause 1 apply except as
follows:
1.1.1 Equipment included in scope
Replace the existing text with the following:
This document specifies safety requirements to equipment for measuring insulation resistance
and to equipment for testing electric strength which have 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.
This group safety publication focusing on safety essential requirements is primarily intended to
be used as a product safety standard for the products mentioned in the scope, but is also
intended to be used by technical committees in the preparation of publications for products
similar to those mentioned in the scope of this document, in accordance with the principles laid
down in IEC Guide 104 and lSO/lEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of
basic safety publications and/or group safety publications in the preparation of its publications.
1.1.2 Equipment excluded from scope
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).
1.2.1 Aspects included in scope
Replace item c) of the second paragraph with the following new item c):
c) spread of fire or arc flash from the equipment (see Clause 9);
Replace the third paragraph with the following two new paragraphs:
HAZARDS arising from NORMAL USE, REASONABLY
Requirements for protection against
FORESEEABLE MISUSE and ergonomic factors are specified in Clause 16 and Clause 101.

Annex BB provides guidance to equipment manufacturers on HAZARDS that should be
considered for equipment intended for performing tests and measurements on hazardous
conductors, including MAINS conductors and telecommunication network conductors.
2 Normative references
IEC 61010-1:2010, Clause 2 and IEC 61010-1:2010/AMD1:2016, Clause 2 apply except as
follows:
Replace the following existing normative references:
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
IEC 61010-031, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 031: Safety requirements for hand-held probe assemblies for electrical
measurement and test
IEC 61180 (all parts), High-voltage test techniques for low-voltage equipment
IEC 61180-1, High-voltage test techniques for low-voltage equipment – Part 1: Definitions, test
and procedure requirements
IEC 61180-2, High-voltage test techniques for low-voltage equipment – Part 2: Test equipment
IEC 61672-1, Electroacoustics – Sound level meters – Part 1: Specifications
IEC 61672-2, Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests
with the following new normative references:
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
IEC 60364-4-44:2007/AMD2:2018
IEC 61010-031:2022, Safety requirements for electrical equipment for measurement, control
and laboratory use – Part 031: Safety requirements for hand-held and hand-manipulated probe
assemblies for electrical test and measurement
IEC 61180:2016, High-voltage test techniques for low-voltage equipment – Definitions, test and
procedure requirements, test equipment
IEC 61672-1:2013, Electroacoustics – Sound level meters – Part 1: Specifications
IEC 61672-2:2013, Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests
IEC 61672-2:2013/AMD1:2017
___________
IEC 61180:2016 replaces everywhere IEC 61180, IEC 61180-1 and IEC 61180-2 are referenced in IEC 61010-1.

– 10 – IEC 61010-2-034:2023 © IEC 2023
Add the following new normative references:
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-5:2014/AMD1:2017
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
IEC 61010-1:2010, Clause 3 and IEC 61010-1:2010/AMD1:2016, Clause 3 apply except as
follows:
3.5 Safety terms
Replace the definition of 3.5.4 with the following new definition:
3.5.4
MAINS
electricity supply system
Add the following new term and 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
4 Tests
IEC 61010-1:2010, Clause 4 and IEC 61010-1:2010/AMD1:2016, Clause 4 apply except as
follows:
4.3.2.5 MAINS supply
Replace the existing title and text with the following:
4.3.2.5 Power supply
The following requirements apply:
a) the voltage of the power supply connected to the MAINS shall be between 90 % and 110 %
of any RATED supply voltage for which the equipment can be set or, if the equipment is RATED
for a greater fluctuation, at any supply voltage within the fluctuation range;
b) the MAINS frequency shall be any RATED frequency;
c) equipment for both a.c. and d.c. shall be connected to an a.c. or d.c. supply;
d) equipment powered from MAINS by single-phase a.c. shall be connected both with normal
and reverse polarity;
e) if the means of connection permit reversal, battery-operated and d.c. equipment shall be
connected with both reverse and normal polarity.

4.3.2.6 Input and output voltages
Replace the existing title and text with the following:
4.3.2.6 Input and output voltages or currents
Input and output voltages or currents, including floating voltages but excluding the supply
voltage connected to the MAINS, shall be set to any voltage or current within their RATED range,
in normal and reverse polarity if possible.
Add the following new subclause:
4.4.2.101 Surge protective devices
Surge protective devices used in MAINS circuits or the circuits measuring MAINS shall be
short-circuited and open-circuited.
5 Marking and documentation
Replace the existing title with the following:
5 Marking, documentation and HAZARD indicator
IEC 61010-1:2010, Clause 5 and IEC 61010-1:2010/AMD1:2016, Clause 5 apply except as
follows:
5.1.5 TERMINALS, connections and operating devices
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 document also
serve as output TERMINALS.
Except as permitted in 5.1.5.101.5:
a) the value of the nominal a.c. r.m.s. line-to-neutral or d.c. voltage of MAINS being measured
shall be marked for measuring circuit TERMINALS RATED for MEASUREMENT CATEGORIES, or the
value of the RATED voltage to earth for other measuring circuit TERMINALS, and
NOTE CLEARANCES and solid insulation for MEASUREMENT CATEGORIES are specified for a nominal a.c. r.m.s.
line-to-neutral or d.c. voltage of MAINS being measured. Neutral is considered to be earthed (see Annex I).
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
MEASUREMENT CATEGORY for each individual, pair, or set of measuring circuit
c) the pertinent
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 arranged 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.
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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
The relevant MEASUREMENT CATEGORY shall be marked for TERMINALS of measuring circuits
RATED for MEASUREMENT CATEGORIES. The MEASUREMENT CATEGORY markings shall be "CAT II",
"CAT III" or "CAT IV" as applicable.
The RATED voltage of the TERMINALS of a measuring circuit intended for MAINS voltage
measurements shall be equal to or higher than their RATED a.c. r.m.s. line-to-neutral or d.c.
voltage.
Marking those TERMINALS with more than one type of MEASUREMENT CATEGORY and its RATED
voltage 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 adjacent to the TERMINALS for measuring circuit TERMINALS
RATED for connection to voltages above the levels of 6.3.1, but that are not RATED for
MEASUREMENT CATEGORIES (see also 5.4.1 bb)).
Conformity is checked by inspection.
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 Measuring circuit TERMINALS which are permanently connected, dedicated or
for non-HAZARDOUS LIVE voltages
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 does not exceed the levels of
6.3.1.
NOTE Examples of acceptable indications that the RATED voltage of the inputs is intended to not exceed 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, does not exceed 30 V a.c.
Conformity is checked by inspection.
5.4.1 GENERAL
Add the following two new items to the list and a new paragraph at the end of the list:
aa) information about each relevant MEASUREMENT CATEGORY if the measuring circuit is RATED
for MEASUREMENT CATEGORIES (see 5.1.5.101.2);
bb) for measuring circuits that are not RATED for MEASUREMENT CATEGORIES, but that 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 shall not be used.
5.4.2 Equipment RATINGS
Add the following three new items to the list:
aa) the output voltage or voltage range, frequency and current RATING;
bb) for insulation resistance measurement equipment, the RATED line or unit capacitance as
required by 6.102;
cc) for insulation resistance measurement equipment intended for use in power station or
substation, the RATED induced current (see 9.101.5).
5.4.3 Equipment installation
Add the following two new items to the list:
aa) for measuring circuit TERMINALS intended for permanent connection and that are RATED
for MEASUREMENT CATEGORIES, information regarding the MEASUREMENT CATEGORY, RATED
voltages or RATED currents as applicable (see 5.1.5.101.2);
bb) for measuring circuit TERMINALS intended for permanent connection and that are not
RATED for MEASUREMENT CATEGORIES, information regarding the RATED voltages, RATED
currents, and RATED TRANSIENT OVERVOLTAGES as applicable (see 5.1.5.101.5).
5.4.4 Equipment operation
Add the following three new items to the list:
aa) instructions for a daily or routine check to ensure the correct functionality of the equipment
before use when one HAZARD indicator has been considered to be sufficient (see 5.101.1);
bb) when performing an a.c. voltage test, instructions to warn the OPERATOR that a hazardous
residual voltage can be present after the interruption of the test if the capacitance value
of the line or unit under test exceeds the maximum RATED line or unit capacitance value
(see 6.102.3);
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cc) when an automatic operation to energise the equipment outputs is provided, a warning to
keep distance from the unit under test.
Add the following new subclause:
5.101 HAZARD indicator
5.101.1 General
At least one of the following HAZARD indicators shall be provided and it shall be functional in
NORMAL CONDITION and in SINGLE FAULT CONDITION of the indicator. One indicator is considered
to be sufficient if the manufacturer's instructions or markings require a daily or routine check to
ensure the correct functionality of the equipment before use.
a) Indicator light
Where an indicator light is provided, it shall illuminate or flash when there are HAZARDOUS
LIVE voltages present on the output TERMINALS. It may start illuminating or flashing at any
point when the output is activated.
The indicator light shall be red in colour.
If the indicator light flashes, the frequency shall be 50 cycles per minute to 300 cycles per
minute. The duty cycle shall be at least 40 %.
Conformity is checked by inspection and measurement.
b) Variable visible indicator
Where a variable visible indicator with contrasting colours is provided, it shall operate when
there are HAZARDOUS LIVE voltages present on the output TERMINALS. It may start operating
at any point when the output is activated.
The visible indicator shall have equally spaced areas of significantly contrasting either
colours or patterns or both.
Conformity is checked by inspection.
c) Audible indicator
Where an audible indicator is provided, it shall produce a sound with a minimum constant
sound pressure level of 70 dBA and a frequency of the fundamental wave lower than 5 kHz
to warn the OPERATOR or a bystander when there are HAZARDOUS LIVE voltages present on
the output TERMINALS. It may start producing a sound at any point when the output is
activated.
Conformity is checked by measuring the maximum A-weighted sound pressure level at the
OPERATOR'S position and at bystander positions. The following conditions apply.
NORMAL USE.
1) During measurement, the equipment is fitted and operated as in
2) Sound level meters used in the measurement conform either to class 1 of
IEC 61672-1:2013 and, when used, integrating sound level meters have been evaluated
according to class 1 of IEC 61672-2:2013.
3) The distance between any wall or any other object and the surface of the equipment is
not less than 3 m.
5.101.2 HAZARD indicator light for fixed equipment
Where the equipment can be permanently installed, provision shall be made to connect an
external HAZARD indicator light.
The power source for the external indicator light may be separated from the equipment.
Conformity is checked by inspection.

6 Protection against electric shock
IEC 61010-1:2010, Clause 6 and IEC 61010-1:2010/AMD1:2016, Clause 6 apply except as
follows:
6.5.2.1 General
Replace the conformity statement with the following:
Conformity is checked as specified in 6.5.2.2 to 6.5.2.6 and 6.5.2.101.
6.5.2.3 PROTECTIVE CONDUCTOR TERMINAL
Replace h) 2) with the following:
h) 2) the PROTECTIVE BONDING shall not be interrupted by any switching or interrupting device.
Devices used for indirect bonding in testing and measuring circuits (see 6.5.2.101) are
permitted to be part of the PROTECTIVE BONDING.
Add the following new subclause and figure:
6.5.2.101 Indirect bonding for testing and measuring circuits
Indirect bonding establishes a connection between the PROTECTIVE CONDUCTOR TERMINAL and
ACCESSIBLE conductive parts if these become HAZARDOUS LIVE as a result of a fault.
Devices to establish indirect bonding are the following:
a) Voltage limiting devices which become conductive when the voltage across them exceeds
the relevant levels of 6.3.2 a), with overcurrent protection to prevent damage of the device.
The duration of current flow versus the body current shall not exceed the levels of
Figure 101.
Conformity is checked by connecting the ACCESSIBLE conductive parts to the minimum and
the maximum HAZARDOUS LIVE voltage according to the equipment RATINGS while the
equipment is operated in NORMAL USE. The current between the ACCESSIBLE conductive parts
and the PROTECTIVE CONDUCTOR TERMINAL is measured with the circuit of Figure A.1.
b) Voltage-sensitive tripping devices which interrupt all poles of the supply connected to the
MAINS or the HAZARDOUS LIVE voltage source, and connect the ACCESSIBLE conductive parts
to the PROTECTIVE CONDUCTOR TERMINAL whenever the voltage across them reaches the
relevant levels of 6.3.2 a). The tripping duration versus the current shall not exceed the
levels of Figure 101.
Conformity is checked by applying successively the relevant voltage level of 6.3.2 a) and
the maximum RATED voltage between the ACCESSIBLE conductive parts and the PROTECTIVE
CONDUCTOR TERMINAL. The current between the ACCESSIBLE con
...