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BS EN IEC 60751:2022

BS EN IEC 60751:2022

$142.49

Industrial platinum resistance thermometers and platinum temperature sensors

Published By Publication Date Number of Pages
BSI 2022 32
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This International Standard specifies the requirements, in addition to the resistance versus temperature relationship, for both industrial platinum resistance thermometers (later referred to as “thermometers”) and industrial platinum resistance temperature sensors (later referred to as “platinum resistors”) whose electrical resistance is derived from defined functions of temperature. Values of temperature in this document are in terms of the International Temperature Scale of 1990, ITS-90. A temperature in the unit °C of this scale is denoted by the symbol t, except in Table A.1 where the full nomenclature t90 /°C is used. This document applies to platinum resistors whose temperature coefficient α, defined as α= R100 − R0 R0 ⋅ 100°C is conventionally written as α = 3,851⋅10-3 °C-1, where R100 is the resistance at t = 100 °C and R0 is the resistance at t = 0 °C. This document covers platinum resistors and thermometers for the temperature range −200 °C to +850 °C with different tolerance classes. It can also cover particular platinum resistors or thermometers for a part of this temperature range. For resistance versus temperature relationships with uncertainties less than 0,1 °C, which are possible only for platinum resistors or thermometers with exceptionally high stability and individual calibration, a more complex interpolation equation than is presented in this document can be necessary. The specification of such equations is outside the scope of this document.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 Blank Page
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
12 3 Terms and definitions
13 4 Characteristics
4.1 General
14 4.2 Nominal resistance versus temperature relationship
4.3 Numerical table of resistance values
5 Compliance and requirements
5.1 Compliance
15 5.2 Tolerance classes
5.2.1 Tolerance class and its temperature range of validity
5.2.2 Tolerance class of platinum resistors
5.2.3 Tolerance classes and marking of thermometers
Tables
Table 1 – Tolerance class of platinum resistors
16 Table 2 – Tolerance class of thermometers
17 5.3 Measuring current
5.4 Electrical supply
5.5 Connecting wire configuration
18 6 Tests
6.1 General
6.1.1 Test categories
6.1.2 Routine production tests
6.1.3 Type tests
Figure 1 – Example of connecting configurations
19 6.1.4 Additional type tests for thermometers
6.1.5 Summary of the tests
6.2 Routine production tests for platinum resistors
6.2.1 Tolerance acceptance test
Table 3 – Table of tests specified in this document
20 6.3 Routine production tests for thermometers
6.3.1 Tolerance acceptance test
Figure 2 – Examples of test results for selecting or rejecting platinum resistors
21 6.3.2 Insulation resistance at ambient temperature
6.3.3 Sheath integrity test
6.3.4 Dimensional test
6.4 Type tests for platinum resistors
6.4.1 Tolerances
22 6.4.2 Stability at upper temperature limit
6.4.3 Self-heating
6.5 Type tests for thermometers
6.5.1 Tolerances
6.5.2 Stability at upper temperature limit
6.5.3 Self-heating
6.5.4 Insulation resistance at elevated temperature
Table 4 – Minimum insulation resistanceof thermometers at the maximum temperature
23 6.5.5 Thermal response time
6.5.6 Thermoelectric effect
6.5.7 Effect of temperature cycling
6.5.8 Effect of hysteresis
6.5.9 Minimum immersion depth
24 6.6 Additional type tests for thermometers
6.6.1 General
6.6.2 Capacitance
6.6.3 Inductance
6.6.4 Dielectric strength
6.6.5 Vibration test
6.6.6 Drop test
6.6.7 Cold seal
7 Information to be made available by the supplier
7.1 General
25 7.2 Applicable to resistors
7.3 Applicable to thermometers
26 Annex A (informative)Numerical table
Table A.1 – Temperature versus resistance relationship below 0 °C; R0 = 100,00 Ω
27 Table A.2 – Temperature versus resistance relationship above 0 °C; R0 = 100,00 Ω
30 Bibliography

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BS EN IEC 60751:2022
$142.49