International Standards and Conformity Assessment for all electrical, electronic and related technologies

 

Project

Reference EN 61000-4-21:2011
Title Electromagnetic compatibility (EMC) - Part 4-21: Testing and measurement techniques - Reverberation chamber test methods
Project Number 22694
Abstract/Scope IEC 61000-4-21:2011 considers tests of immunity and intentional or unintentional emissions for electric and/or electronic equipment and tests of screening effectiveness in reverberation chambers. It establishes the required test procedures for performing such tests. Only radiated phenomena are considered. The objective of IEC 61000-4-21:2011 is to establish a common reference for using reverberation chambers to evaluate the performance of electric and electronic equipment when subjected to radio-frequency electromagnetic fields and for determining the levels of radio-frequency radiation emitted from electric and electronic equipment. IEC 61000-4-21:2011 does not intend to specify the tests to be applied to a particular apparatus or system. Its main aim is to give a general basic reference to all concerned product committees of the IEC. The product committees should select emission limits and test methods in consultation with CISPR. The product committees remain responsible for the appropriate choice of the immunity tests and the immunity test limits to be applied to their equipment. Other methods, such as those covered in IEC 61000-4-3, CISPR 16-2-3 and CISPR 16-2-4 may be used. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision and includes the following significant technical changes with respectto the first edition: - In Clause 8, the use and specifications of E-field probes for application to reverberation chambers has been added. - In Annex A, additional guidance and clarifications on the use of reverberation chambers at relatively low frequencies of operation (i.e., close to the lowest usable frequency of a given chamber) are given, and its implications on the estimation of field uncertainty are outlined. - In Annex B, symmetric location of the field probes when the chamber exhibits cylindrical symmetry has been disallowed, as such placement could otherwise yield a false indication of field uniformity and chamber performance at different locations. - Annex C now contains more quantitative guidance on the setting of the maximum permissible stirring speeds that warrant quasi-static conditions of operation for chamber validation and testing. - In Annex D, a requirement for the EUT and equipment not to occupy more than 8 % of the total chamber volume in immunity testing has been added. - Annex E has been extended with further guidance on the value of EUT directivity to be used in the estimation of radiated power and field. - In Annex I, some clarifications on antenna efficiency measurements have been added. - A new Annex K has been added that covers measurement uncertainty in reverberation chambers.
Status
Published

Status

Current Stage code 6060
Current Stage code date 2011-04-29
Current Stage code deadline  
Deadline date for vote  

Legal

Directive(s) EMC related (2004/108/EC)
Mandate(s) M/490
Order Voucher  

Details

IEC Technical Body IEC/SC 77B
Reference Document IEC 61000-4-21:2011 (EQV)
ICS 33.100.10 - Emission
33.100.20 - Immunity
Keywords Electromagnetic; Compatibility; EMC; Reverberation; Chamber
Note Supersedes EN 61000-4-21:2003
A-Deviation(s)  
Special National Condition(s)  

Environment

Clause
Categories - Aspects
Product Life Cycle
Information

History

Stage
Date
Deadline Date
Documents
6060 2011-04-29   export to doc file  EN  FR  DE
5099 2011-03-03 2011-03-31  
5060 2010-06-25 2010-07-12 export to doc file  EN
5020 2009-10-23 2010-03-26  
1090 2009-10-21 2009-10-23  

Implementation Dates

date of Ratification (DOR) (1) 2011-03-03
date of Availability (DAV) (2) 2011-04-29
date of Announcement (DOA) (3) 2011-06-03
date of Publication (DOP) (4) 2011-12-03
date of Withdrawal (DOW) (5) 2014-03-03

Relations

Supersedes EN 61000-4-21:2003
Superseded by  
Normative reference (6) EN 55016-1-1:2010
EN 55016-2-3:2010
corr.
IEC 60050-161:1990
EN 60068-1:1994
EN 61000-4-3:2006
A1:2008

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved


(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat


(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level


(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement


(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn


(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.