IEC 60751:2022

IEC 60751 ®
Edition 3.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial platinum resistance thermometers and platinum temperature sensors

Thermomètres à résistance de platine et capteurs hermométriques de platine
industriels
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IEC 60751 ®
Edition 3.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial platinum resistance thermometers and platinum temperature sensors

Thermomètres à résistance de platine et capteurs hermométriques de platine

industriels
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.200.20 ISBN 978-2-8322-1069-2

– 2 – IEC 60751:2022 © IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Characteristics . 8
4.1 General . 8
4.2 Nominal resistance versus temperature relationship . 9
4.3 Numerical table of resistance values . 9
5 Compliance and requirements . 9
5.1 Compliance . 9
5.2 Tolerance classes . 10
5.2.1 Tolerance class and its temperature range of validity . 10
5.2.2 Tolerance class of platinum resistors . 10
5.2.3 Tolerance classes and marking of thermometers . 10
5.3 Measuring current . 12
5.4 Electrical supply . 12
5.5 Connecting wire configuration . 12
6 Tests . 13
6.1 General . 13
6.1.1 Test categories . 13
6.1.2 Routine production tests . 13
6.1.3 Type tests . 13
6.1.4 Additional type tests for thermometers . 14
6.1.5 Summary of the tests . 14
6.2 Routine production tests for platinum resistors . 14
6.2.1 Tolerance acceptance test . 14
6.3 Routine production tests for thermometers . 15
6.3.1 Tolerance acceptance test . 15
6.3.2 Insulation resistance at ambient temperature . 16
6.3.3 Sheath integrity test . 16
6.3.4 Dimensional test . 16
6.4 Type tests for platinum resistors . 16
6.4.1 Tolerances . 16
6.4.2 Stability at upper temperature limit . 17
6.4.3 Self-heating . 17
6.5 Type tests for thermometers . 17
6.5.1 Tolerances . 17
6.5.2 Stability at upper temperature limit . 17
6.5.3 Self-heating . 17
6.5.4 Insulation resistance at elevated temperature . 17
6.5.5 Thermal response time . 18
6.5.6 Thermoelectric effect . 18
6.5.7 Effect of temperature cycling . 18
6.5.8 Effect of hysteresis . 18
6.5.9 Minimum immersion depth . 18

6.6 Additional type tests for thermometers . 19
6.6.1 General . 19
6.6.2 Capacitance . 19
6.6.3 Inductance . 19
6.6.4 Dielectric strength . 19
6.6.5 Vibration test . 19
6.6.6 Drop test . 19
6.6.7 Cold seal . 19
7 Information to be made available by the supplier . 19
7.1 General . 19
7.2 Applicable to resistors . 20
7.3 Applicable to thermometers . 20
Annex A (informative) Numerical table . 21
Bibliography . 25

Figure 1 – Example of connecting configurations . 13
Figure 2 – Examples of test results for selecting or rejecting platinum resistors . 15

Table 1 – Tolerance class of platinum resistors. 10
Table 2 – Tolerance class of thermometers . 11
Table 3 – Table of tests specified in this document . 14
Table 4 – Minimum insulation resistance of thermometers at the maximum temperature . 17
Table A.1 – Temperature versus resistance relationship below 0 °C; R = 100,00 Ω . 21
Table A.2 – Temperature versus resistance relationship above 0 °C; R = 100,00 Ω . 22
– 4 – IEC 60751:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL PLATINUM RESISTANCE THERMOMETERS
AND PLATINUM TEMPERATURE SENSORS

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 interes
...