EN 62311 Electrical Equipment Linked with Human Exposure
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Summary of EN 62311 Radiator Testing Information
EN 62311 assesses electronic equipment related to human exposure restrictions for electromagnetic fields from 0 Hz – 200 GHz. This international standard applies to electronic and electrical equipment for which no dedicated product or product family standard regarding human exposure to electromagnetic fields applies. The purpose of this test is to provide assessment methods and criteria to evaluate the equipment against basic restrictions or reference levels on exposure to the general public.
Compliance criteria is often derived using realist assumptions about conditions under which exposures from a device may occur.
An intentional radiator can be defined as any device that is deliberately designed to produce radio waves. Radio transmitters of all kinds, including the garage door opener, cordless telephone, cellular phone, wireless video sender, wireless microphone, and many others fall into this category.
An unintentional radiator is defined as any device that is designed to use radio frequency electrical signals within itself, or sends radio frequency signals over conducting cabling to other equipment, but is not intended to radiate radio frequency energy.
Scope of EN 62311 RF Testing of Wireless Devices
Reference levels for public exposure are derived from worst-case scenarios about exposure. If the reference levels are met, the basic restrictions will also be met. In some situations, it may be possible to show compliance with the basic restrictions directly.
Assessments are made according to an existing basic standard. If the assessment method is not fully applicable, deviations are allowed as long as:
- A description of the assessment method used is given
- An evaluation of the total uncertainty is given
Both must be given in the test report.
A relative uncertainty of 30% is used for several EMF assessment methods. Therefore, this level of relative uncertainty is used as a default maximum in this generic standard.
EN 62311 Wireless RF Testing Lab Procedures
First, the equipment determines the nature of EMF emissions. It also determines the intended usage conditions. The assessment is performed by field and body currents being determined at normal operating conditions.
If the quantities are below a certain threshold, the equipment is deemed to meet the requirements of this standard. If not, further assessment involving more detailed measurements, calculations, and sources of exposure is taken. Again, if the equipment meets the specified requirements, it is deemed to comply with this standard.
The decision of “low power / inherently compliant “is based on the assessment of emissions that are specified in a performance standard. E.g., a transmitter performance standard and where the output power is limited to a level that cannot exceed basic restrictions.
Keystone’s RF Laboratory Provides Expert Wireless RF Testing Services
In addition to EN 62311 testing, Keystone has a full scope of expertise including licensed exempt radios, simultaneous transmitters, and pre-approved radio modules. Our team strives to give our customers more time and energy on product development instead of testing. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling.
If you are ready to start your wireless product testing, please request a quote. Have a question about RF device testing? Contact us or call (724) 657-9940 and we will determine the best course of action.