BS EN 55024:2010+A1:2015

What is BS EN 55024 - Immunity characteristics — Limits and methods of measurement about?  

BS EN 55024 is a CISPR publication, which applies to information technology equipment (ITE) as defined in CISPR 22.  

BS EN 55024 defines the immunity test requirements for equipment within its scope in relation to continuous and transient conducted and radiated disturbances, including electrostatic discharges (ESD). Procedures are defined for the measurement of ITE and limits are specified which are developed for ITE within the frequency range from 0 Hz to 400 GHz. For exceptional environmental conditions, special mitigation measures may be required.   

Owing to testing and performance assessment considerations, some tests are specified in defined frequency bands or at selected frequencies. Equipment which fulfils the requirements at these frequencies is deemed to fulfil the requirements in the entire frequency range from 0 Hz to 400 GHz for electromagnetic phenomena.  

The test requirements are specified for each port considered.  

Note 1: Safety considerations are not covered in BS EN 55024. 

Note 2: In special cases, situations will arise where the level of disturbance may exceed the levels specified in BS EN 55024, for example where a hand-held transmitter is used in proximity to equipment. In these instances, special mitigation measures may have to be employed.  

Who is BS EN 55024 - Immunity characteristics — Limits and methods of measurement for? 

BS EN 55024:2010+A1 on Immunity characteristics — Limits and methods of measurement are useful for: 

• Information technology industry 
• Immunity Test conductors 
• Manufacturers of ITE 

Why should you use BS EN 55024 - Immunity characteristics — Limits and methods of measurement? 

BS EN 55024 establishes uniform requirements for the electromagnetic immunity of information technology equipment. The test methods are given in the referenced Basic EMC Immunity Standards. BS EN 55024 specifies applicable tests, test levels, product operating conditions, and assessment criteria. 

The object of BS EN 55024 is to establish requirements that will provide an adequate level of intrinsic immunity so that the equipment will operate as intended in its environment. 

What’s changed since the last update?  

BS EN 55024:2010+A1 supersedes EN 55024:1998, EN 55024:1998/IS1:2007 + A1:2001 + A2:2003. BS EN 55024:2010+A1 includes some technical changes with respect to EN 55024:1998, EN 55024:1998/IS1:2007 + A1:2001 + A2:2003. These include: 

• Dated references updated 
• Option of using a 4 % step size for continuous conducted immunity test deleted  
• Revision of Annex A for telephony equipment including methodology for measuring the demodulation from a speaker/hands-free device 
• Inclusion of new annex related to DSL equipment