IEC 60584-3:2021

Thermocouples - Part 3: Extension and compensating cables - Tolerances and identification system

IEC 60584-3:2021 It is necessary for thermocouple temperature measurement that the electro-motive force (abbreviated as e.m.f. hereafter) of the thermocouple circuit is precisely measured by a measuring instrument. A thermocouple is electrically connected to the instrument by a proper pair of electric cables. IEC 60584-3:2021 standardizes these cables. It specifies identification and manufacturing tolerances for extension and compensating cables (mineral insulated extension and compensating cables are not included) provided directly to users of industrial processes. These tolerances are determined with respect to the e.m.f. ver-sus temperature relationship of IEC 60584-1. The requirements for extension and compensating cables for use in industrial process control are specified.

Couples thermoélectriques - Partie 3: Câbles d'extension et de compensation - Tolérances et système d'identification

IEC 60584-3:2021 Pour le mesurage de la température des couples thermoélectriques, il est nécessaire que la force électromotrice du circuit des couples thermoélectriques soit mesurée de manière précise à l'aide d'un appareil de mesure. Un couple thermoélectrique est relié électriquement à l'appareil de mesure au moyen d'une paire de câbles électriques appro-priée. L'IEC 60584-3:2021 normalise ces câbles. Elle spécifie les tolérances pour la fabrica-tion et l'identification des câbles d'extension et de compensation (autres que les câbles d'extension et de compensation à isolation minérale) fournis directement aux utilisateurs de procédés industriels. Ces tolérances sont déterminées par rapport à la relation force électromotrice - température établie dans l'IEC 60584­1. Les exigences relatives aux câbles d'extension et de compensation destinés à être utilisés dans le cadre de la com-mande des processus industriels sont spécifiées.

General Information

• Status: Published
• Publication Date: 15-Feb-2021
• ICS: 17.200.20 - Temperature-measuring instruments
• Technical Committee: SC 65B - Measurement and control devices
• Drafting Committee: WG 5 - TC 65/SC 65B/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 26-Feb-2021
• Completion Date: 16-Feb-2021

Relations

• Revises: IEC 60584-3:2007 - Thermocouples - Part 3: Extension and compensating cables - Tolerances and identification system
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60584-3 ®
Edition 3.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Thermocouples –
Part 3: Extension and compensating cables – Tolerances and identification
system
Couples thermoélectriques –
Partie 3: Câbles d'extension et de compensation – Tolérances et système
d'identification
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IEC 60584-3 ®
Edition 3.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Thermocouples –
Part 3: Extension and compensating cables – Tolerances and identification

system
Couples thermoélectriques –
Partie 3: Câbles d'extension et de compensation – Tolérances et système

d'identification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.200.20 ISBN 978-2-8322-9392-8

– 2 – IEC 60584-3:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General . 6
5 Tolerance values . 6
6 Colour coding . 7
6.1 Negative conductor . 7
6.2 Positive conductor . 7
6.3 Outer sheath . 7
6.4 Connectors . 7
7 Dimensions. 7
8 Requirements . 9
8.1 Materials . 9
8.1.1 Insulating materials . 9
8.1.2 Conductor materials. 9
8.2 Electromagnetic shielding . 9
8.3 Capacitance and inductance . 9
8.4 Resistance of positive or negative conductor and loop resistance of a cable . 9
8.5 Insulation resistance . 10
8.6 Dielectric strength . 10
9 Identification and shipping form . 10
9.1 Additional identification . 10
9.2 The shipping form and further information . 10
Annex A (informative) Examples for forms and sizes other than wires and stranded
wires . 11

Table 1 – Tolerance classes for extension and compensating cables . 6
Table 2 – Colour code of positive conductor insulation for extension and compensating
cables . 7
Table 3 – Nominal diameters of typical single strand (solid) wires . 8
Table 4 – Constructions and typical nominal cross-sectional area of multi-stranded
wires . 8
Table A.1 – Rods . 11
Table A.2 – Flat wires . 11
Table A.3 – Strips . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
THERMOCOUPLES –
Part 3: Extension and compensating cables –
Tolerances and identification system

FOREWORD
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International Standard IEC 60584-3 has been prepared by subcommittee 65B: Measurement
and control devices, of IEC Technical Committee 65: Industrial-process measurement, control
and automation.
This third edition cancels and replaces the second edition issued in 2007. This edition consti-
tutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) revision of tolerance values to take recent technological advancement into account,
b) addition of new colour coding for the thermocouple Type C and A in response to the newly
revised IEC 60584‑1 Edition 3: 2013,
c) creation of an annex to provide examples of sizes for the rod, flat wire and strip of the
compensating and extending conductors for thermocouples.

– 4 – IEC 60584-3:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
65B/1189/FDIS 65B/1191/RVD
Full information on the voting for
...