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ITU-T Recommendations

ITU-T Recommendations on Human Exposure to Electromagnetic Fields


Rec. No.TitleSummaryStatusApproval Date
K.52 Guidance on complying with limits for human exposure to electromagnetic fieldsThis Recommendation aims to help with compliance of telecommunication installations and mobile handsets or other radiating devices used against the head with safety limits for human exposure to electromagnetic fields (EMFs). It presents general guidance, a calculation method, and an installation assessment procedure. The assessment procedure for telecommunication installations, based on safety limits provided by ICNIRP, helps users determine the likelihood of installation compliance based on accessibility criteria, antenna properties and emitter power. The IEC Standard for the compliance measurement of mobile handsets is recommended.Approved2004-12-14
K.61 Guidance on measurement and numerical prediction of electromagnetic fields for compliance with human exposure limits for telecommunication installationsRecommendation ITU-T K.61 helps telecommunication operators to verify compliance with exposure standards promulgated by local or national authorities. This Recommendation gives guidance on measurement methods that can be used to achieve a compliance assessment. It also provides guidance on the selection of numerical methods suitable for exposure prediction in various situations.Approved2008-02-29
K.62 System level radiated emissions compliance using mathematical modellingThis Recommendation supports telecommunication operators in demonstrating the compliance of the radiated emissions generated by telecommunication systems.Telecommunication operators typically construct their systems from many items of equipment that are each engineered to individually meet EMC requirements, including radiated emissions. This means that a system will typically contain a number of emissions sources (i.e., separate equipment items) at a number of common frequencies. This is true if the system contains many items of the same equipment or many items of different equipment.For such a system, the superposition of these multiple emissions has the potential to produce a system emission level that is greater than the system emission limit. This is of fundamental concern for telecommunication operators seeking to demonstrate the compliance of the radiated emissions of their systems.This Recommendation introduces a statistical approach to systems radiated emission compliance. By applying a statistical approach to the treatment of basic variables that are not known by the operator, a method is presented that allows the system emission level to be described statistically in terms of a probability and cumulative probability distributions.These distributions allow the compliance of the system emission level, with respect to a limit, to be expressed as a statistical confidence level (rather than as a simple "Pass" or "Fail" statement). It is proposed that the 80% confidence level be used for compliance to align with the approach taken for series production equipment within CISPR 22.The method presented may also be used by other organizations that either build or operate other systems that are formed from the integration of many items of digital electronic equipment that each individually comply with their own radiated emissions limit.Approved2004-02-29
K.70 Mitigation techniques to limit human exposure to EMFs in the vicinity of radiocommunication stationsITU-T Recommendation K.70 defines techniques which may be used by telecommunication operators to evaluate the cumulative (total) exposure ratio in the vicinity of transmitting antennas and to identify the main source of radiation. It offers guidance on mitigation methods which allow reduction of radiation level in order to comply with exposure limits. It also provides guidance on procedures necessary in the environment (on site) in which, in most cases, there is a simultaneous exposure to multiple frequencies from many different sources. Radiating sources may belong to many operators and may represent different radiocommunication services (e.g., cellular systems, trunking systems, broadcasting, radio relays, wireless access, etc.).Approved2007-06-29
K.83 Monitoring of electromagnetic field levelsRecommendation ITU-T K.83 gives guidance on how to make long-term measurements for the monitoring of electromagnetic fields (EMF) in the selected areas that are under public concern, in order to show that EMFs are under control and under the limits. The purpose of this Recommendation is to provide for the general public clear and easily available data concerning electromagnetic field levels in the form of results of continuous measurement.Approved2011-03-09
K.90 Evaluation techniques and working procedures for compliance with exposure limits of network operator personnel to power-frequency electromagnetic fieldsRecommendation ITU-T K.90 provides evaluation techniques and guidelines for compliance with safety limits for human exposure to electromagnetic fields (EMFs) of telecommunication network personnel (e.g., outside plant craft) at power frequencies (DC, 50 Hz and 60 Hz). This Recommendation does not set safety limits; it seeks to provide techniques and procedures for determining the need for any precautions at the work site. This Recommendation includes an electronic attachment containing the EMFACDC program. Approved2012-05-29
K.91 Guidance for assessment, evaluation and monitoring of human exposure to radio frequency electromagnetic fieldsThere are many possible methods of exposure assessment and each of them has its own advantages and disadvantages. Recommendation ITU-T K.91 gives guidance on how to assess and monitor human exposure to radio frequency (RF) electromagnetic fields (EMF) in areas with surrounding radiocommunication installations based on existing exposure and compliance standards in the frequency range of 9 kHz to 300 GHz. This includes procedures of evaluating exposure and how to show compliance with exposure limits with reference to existing standards. Recommendation ITU T K.91 is oriented to the examination of the area accessible to people in the real environment of currently operated services with many different sources of RF EMF, but also gives references to standards and Recommendations related to EMF compliance of products. This Recommendation includes an electronic attachment containing an uncertainty calculator and the Watt Guard modules. Approved2012-05-29