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17 Metrology and measurement. Physical phenomena
New standards
EVS-EN ISO 1938-1:2026
Geometrical product specifications (GPS) - Dimensional measuring equipment - Part 1: Plain limit gauges of linear size (ISO 1938-1:2026)
Scope: This document specifies requirements for the most important metrological and design characteristics of plain limit gauges of linear size.
This document defines the different types of plain limit gauges used to verify linear dimensional specifications associated with linear size.
This document also defines the design characteristics and the metrological characteristics for these limit gauges as well as the new or wear limits state maximum permissible limits (MPLs) for the new state or wear limits state for these metrological characteristics.
In addition, this document describes the use of limit gauges. It covers linear sizes of up to 500 mm.
This document defines the different types of plain limit gauges used to verify linear dimensional specifications associated with linear size.
This document also defines the design characteristics and the metrological characteristics for these limit gauges as well as the new or wear limits state maximum permissible limits (MPLs) for the new state or wear limits state for these metrological characteristics.
In addition, this document describes the use of limit gauges. It covers linear sizes of up to 500 mm.
Base documents: ISO 1938-1:2026; EN ISO 1938-1:2026
Replaces: EVS-EN ISO 1938-1:2015
EVS-EN ISO 9053-1:2026
Acoustics - Determination of airflow resistance - Part 1: Static method (ISO 9053-1:2026)
Scope: This document specifies the measurement of the determination of the static airflow resistance (see also References [1]and [2]) in a laminar flow regime, of porous materials for acoustical applications.
Base documents: ISO 9053-1:2026; EN ISO 9053-1:2026
Replaces: EVS-EN ISO 9053-1:2018
IEC 60704-2-1:2026
Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-1: Particular requirements for dry vacuum cleaners
Scope: IEC 60704-2-1:2026 specifies the determination of airborne acoustical noise of mains operated and cordless dry vacuum cleaners including their accessories and docking stations for household use or under conditions similar to those in households. For wet and dry vacuum cleaners, the dry cleaning function applies. The wet cleaning function is measured in accordance with IEC 60704-2-20. Particular requirements for floor cleaning robots are specified in IEC 60704-2-17 . This document describes the determination of the noise emission of dry vacuum cleaners under normal operating conditions on carpet and hard floor in accordance with IEC 62885-2. This fifth edition cancels and replaces the fourth edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with IEC 60704 1:2021;
b) addressing consumer relevant testing aspects;
c) robustness of standards and closing potential loopholes
d) enlarged scope to include noise measurement on docking stations.
This document is intended to be used in conjunction with IEC 60704-1:2021, Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 1: General requirements.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with IEC 60704 1:2021;
b) addressing consumer relevant testing aspects;
c) robustness of standards and closing potential loopholes
d) enlarged scope to include noise measurement on docking stations.
This document is intended to be used in conjunction with IEC 60704-1:2021, Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 1: General requirements.
Base documents:
Replaces: IEC 60704-2-1:2020
IEC 60704-2-1:2026 EXV
Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-1: Particular requirements for dry vacuum cleaners
Scope: IEC 60704-2-1:2026 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 60704-2-1:2026 EXV includes the content of the references made to IEC 60704-1:2021.
IEC 60704-2-1:2026 specifies the determination of airborne acoustical noise of mains operated and cordless dry vacuum cleaners including their accessories and docking stations for household use or under conditions similar to those in households. For wet and dry vacuum cleaners, the dry cleaning function applies. The wet cleaning function is measured in accordance with IEC 60704-2-20. Particular requirements for floor cleaning robots are specified in IEC 60704-2-17 . This document describes the determination of the noise emission of dry vacuum cleaners under normal operating conditions on carpet and hard floor in accordance with IEC 62885-2. This fifth edition cancels and replaces the fourth edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with IEC 60704 1:2021;
b) addressing consumer relevant testing aspects;
c) robustness of standards and closing potential loopholes
d) enlarged scope to include noise measurement on docking stations.
This document is intended to be used in conjunction with IEC 60704-1:2021, Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 1: General requirements.
IEC 60704-2-1:2026 specifies the determination of airborne acoustical noise of mains operated and cordless dry vacuum cleaners including their accessories and docking stations for household use or under conditions similar to those in households. For wet and dry vacuum cleaners, the dry cleaning function applies. The wet cleaning function is measured in accordance with IEC 60704-2-20. Particular requirements for floor cleaning robots are specified in IEC 60704-2-17 . This document describes the determination of the noise emission of dry vacuum cleaners under normal operating conditions on carpet and hard floor in accordance with IEC 62885-2. This fifth edition cancels and replaces the fourth edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with IEC 60704 1:2021;
b) addressing consumer relevant testing aspects;
c) robustness of standards and closing potential loopholes
d) enlarged scope to include noise measurement on docking stations.
This document is intended to be used in conjunction with IEC 60704-1:2021, Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 1: General requirements.
Base documents:
IEC 63506:2026
Calibration of the prompt fission neutron logging tools
Scope: IEC 63506:2026 specifies the calibration method of prompt fission neutron logging tools. This document applies to the calibration of prompt fission neutron logging tools for uranium exploration and mining.
Base documents:
IEC 63589-1:2026
Linear accelerator - Electron linear accelerator for radiation processing - Part 1: General requirements and test methods
Scope: IEC 63589-1:2026 specifies the general requirements and test methods of radiation processing electron linear accelerator device. The rules of naming, technical requirements, test methods, inspection rules, marking, packaging, storage, and transportation requirements are also provided.
This document applies to the electron linear accelerators for radiation processing with energy 1,0 MeV to 15 MeV.
This document applies to the electron linear accelerators for radiation processing with energy 1,0 MeV to 15 MeV.
Base documents:
IEC 62828-1:2026
Reference conditions and procedures for testing industrial and process measurement transmitters - Part 1: General procedures for all types of transmitters
Scope: IEC 62828-1:2026 establishes a general framework for defining reference conditions and test procedures applicable for assessing the measurement performances of all types of industrial and process measurement transmitters (PMTs) used in measuring and control systems for industrial process and machinery. For the purpose of this document, an analogue PMT is a process measurement transmitter with only analogue current and/or voltage output(s), irrespective the technology adopted and the complexity of the circuitry. All the other process measurement transmitters, with digital output(s) only or with hybrid analogue and digital output(s), are considered to be digital PMTs. This document constitutes a common reference for the other parts of the IEC 62828 series. Specific test procedures and additional requirements for given types of PMTs (pressure, temperature, level, flow, etc.) are covered by other parts of this series. Sensing devices according to the IEC 60947 series are excluded from the scope of this document.
NOTE 1 In industrial and process applications, to indicate the process measurement transmitters, it is common also to use the terms "industrial transmitters", or "process transmitters".
NOTE 2 For better clarity, when the complete definition "industrial and process measurement transmitter" makes the sentence too long in this document, the short term "transmitter", or PMT, is used instead.
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) informative Annexes E, F, G and H have been removed;
b) a new informative Annex G “Example of signal current for a 4 mA to 20 mA PMT” has been introduced (it has been moved from IEC 62828-2:2017 to this document);
c) the definitions of warm-up time, settling time and output signal have been moved from IEC 62828-4:2020 to this document;
d) The definitions of “inaccuracy” and “accuracy” have been reworked;
e) The clause regarding test report has been reworked.
NOTE 1 In industrial and process applications, to indicate the process measurement transmitters, it is common also to use the terms "industrial transmitters", or "process transmitters".
NOTE 2 For better clarity, when the complete definition "industrial and process measurement transmitter" makes the sentence too long in this document, the short term "transmitter", or PMT, is used instead.
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) informative Annexes E, F, G and H have been removed;
b) a new informative Annex G “Example of signal current for a 4 mA to 20 mA PMT” has been introduced (it has been moved from IEC 62828-2:2017 to this document);
c) the definitions of warm-up time, settling time and output signal have been moved from IEC 62828-4:2020 to this document;
d) The definitions of “inaccuracy” and “accuracy” have been reworked;
e) The clause regarding test report has been reworked.
Base documents:
Replaces: IEC 62828-1:2017
IEC 62828-2:2026
Reference conditions and procedures for testing industrial and process measurement transmitters - Part 2: Specific procedures for pressure transmitters
Scope: IEC 62828-2:2026 establishes specific procedures for testing pressure process measurement transmitters (PMT) used in measuring and control systems for industrial processes and for machinery. A pressure PMT can feature a remote seal to bring the process variable to the sensing element in the PMT. When the remote seal cannot be separated from the PMT, the complete device is tested. For general test procedures, reference is made to IEC 62828-1, which is applicable to all types of process measurement transmitters.
NOTE In industrial and process applications, to indicate the process measurement transmitters, it is common also to use the terms "industrial transmitters", or "process transmitters".
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) revision according to the latest IEC rules;
b) comparison with the general part of IEC 62828-1;
c) additions and more precise definitions in the “Terms and definitions” clause;
d) correction of the calculation formulas for the measurement error;
e) more precise formulation of long-term drift;
f) extension of additional tests;
g) transfer of the annex “Example of signal current range for a 4 to 20 mA PMT” in IEC 62828-1;
h) new Annex C “Main characteristics for pressure transmitters”.
NOTE In industrial and process applications, to indicate the process measurement transmitters, it is common also to use the terms "industrial transmitters", or "process transmitters".
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) revision according to the latest IEC rules;
b) comparison with the general part of IEC 62828-1;
c) additions and more precise definitions in the “Terms and definitions” clause;
d) correction of the calculation formulas for the measurement error;
e) more precise formulation of long-term drift;
f) extension of additional tests;
g) transfer of the annex “Example of signal current range for a 4 to 20 mA PMT” in IEC 62828-1;
h) new Annex C “Main characteristics for pressure transmitters”.
Base documents:
Replaces: IEC 62828-2:2017
Replaced standards
EVS-EN ISO 1938-1:2015
Geometrical product specifications (GPS) - Dimensional measuring equipment - Part 1: Plain limit gauges of linear size (ISO 1938-1:2015)
Scope: This international standard specifies the most important metrological and design characteristics of plaint limit gauges of linear size This International Standard defines the different types of plain limit gauges used to prove conformance with linear dimensional specification associated to linear size.
This international standard also defines the design characteristics and the metrological characteristics for these limit gauges as well as the new or worn state MPEs for these characteristics.
This international standard also describes the use of limit gauges and it covers linear sizes up to 500 mm.
This international standard also defines the design characteristics and the metrological characteristics for these limit gauges as well as the new or worn state MPEs for these characteristics.
This international standard also describes the use of limit gauges and it covers linear sizes up to 500 mm.
Base documents: ISO 1938-1:2015; EN ISO 1938-1:2015
Replaced: EVS-EN ISO 1938-1:2026
IEC 62828-2:2017
Reference conditions and procedures for testing industrial and process measurement transmitters - Part 2: Specific procedures for pressure transmitters
Scope: IEC 62828-2:2017 establishes specific procedures for testing pressure process measurement transmitters (PMT) used in measuring and control systems for industrial processes and for machinery control systems. A pressure PMT can feature a remote seal to bring the process variable to the sensing element in the PMT. When the remote seal cannot be separated from the PMT, the complete device is tested.
Base documents:
Replaced: IEC 62828-2:2026
IEC 62828-1:2017
Reference conditions and procedures for testing industrial and process measurement transmitters - Part 1: General procedures for all types of transmitters
Scope: IEC 62828-1:2017 establishes general framework for defining reference conditions and test procedures applicable to all types of industrial and process measurement transmitters (PMTs) used in measuring and control systems for industrial process and machinery. These reference test conditions are divided into “standard reference conditions”, which apply when determining the accuracy of measurement, and “ambient and process reference conditions”, which are used to assess the influence of external quantities on the measurement. The IEC 62828 series cancels and replaces the IEC 60770 series and proposes revisions for the IEC 61298 series.
Base documents:
Replaced: IEC 62828-1:2026
IEC 60704-2-1:2020
Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-1: Particular requirements for dry vacuum cleaners
Scope: IEC 60704-2-1:2020 is applicable for the determination of airborne acoustical noise of mains operated and cordless dry vacuum cleaners for household use or under conditions similar to those in households. This part of IEC 60704 does not apply to vacuum cleaners for industrial or professional purposes. This edition includes the following significant technical changes with respect to the previous edition:
a) product scope is extended to cordless and similar vacuum cleaners;
b) definitions of "cleaning head", "active nozzle" and "standard Wilton test carpet" have been added;
c) specification of standard Wilton test carpet has been removed; reference is made to IEC/TS 62885-1;
d) specific requirements on equipping and pre-conditioning have been added;
e) topic ageing of test carpet is addressed.
This Part 2-1 supplements or modifies the corresponding clauses in IEC 60704-1:2010.
a) product scope is extended to cordless and similar vacuum cleaners;
b) definitions of "cleaning head", "active nozzle" and "standard Wilton test carpet" have been added;
c) specification of standard Wilton test carpet has been removed; reference is made to IEC/TS 62885-1;
d) specific requirements on equipping and pre-conditioning have been added;
e) topic ageing of test carpet is addressed.
This Part 2-1 supplements or modifies the corresponding clauses in IEC 60704-1:2010.
Base documents:
Replaced: IEC 60704-2-1:2026
Drafts
prEN ISO 13164-2
Water quality - Radon-222 - Part 2: Test method using gamma-ray spectrometry (ISO/DIS 13164-2:2026)
Scope: ISO 13164-2:2013 specifies a test method for the determination of radon-222 activity concentration in a sample of water following the measurement of its short-lived decay products by direct gamma-spectrometry of the water sample.
The radon-222 activity concentrations, which can be measured by this test method utilizing currently available gamma-ray instruments, range from a few becquerels per litre to several hundred thousand becquerels per litre for a 1 l test sample.
This test method can be used successfully with drinking water samples. The laboratory is responsible for ensuring the validity of this test method for water samples of untested matrices.
An annex gives indications on the necessary counting conditions to meet the required sensitivity for drinking water monitoring.
The radon-222 activity concentrations, which can be measured by this test method utilizing currently available gamma-ray instruments, range from a few becquerels per litre to several hundred thousand becquerels per litre for a 1 l test sample.
This test method can be used successfully with drinking water samples. The laboratory is responsible for ensuring the validity of this test method for water samples of untested matrices.
An annex gives indications on the necessary counting conditions to meet the required sensitivity for drinking water monitoring.
Base documents: ISO/DIS 13164-2; prEN ISO 13164-2
prEN ISO 25178-70
Geometrical product specification (GPS) - Surface texture: Areal - Part 70: Material measures (ISO/DIS 25178-70:2026)
Scope: ISO 25178-70:2014 specifies the characteristics of material measures used for the periodic verification and adjustment of areal surface texture measurement instruments.
Base documents: ISO/DIS 25178-70; prEN ISO 25178-70