CISPR 16-4-3/TR-2007
无线电干扰规范和抗扰度测量设备和测量方法.第4-3部分:不确定度,统计学和限值建模.统计考虑批量产品的EMC符合性确定

Specification for radio disturbance and immunity measuring apparatus and methods – Part 4-3: Uncertainties, statistics and limit modelling – Statistical considerations in the determination of EMC compliance of mass-produced products

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标准号

CISPR 16-4-3/TR-2007

发布

2007年

发布单位

国际电工委员会

 

 

引用标准

CISPR 16-4-2 IEC 60050-161-1990

适用范围

This part of CISPR 16 deals with statistical considerations in the determination of EMC compliance of mass-produced products. The reasons for such statistical considerations are: a) that the abatement of interference aims that the majority of the appliances to be approved shall not cause interference; b) that the CISPR limits should be suitable for the purpose of type approval of massproduced appliances as well as approval of single-produced appliances; c) that to ensure compliance of mass-produced appliances with the CISPR limits, statistical techniques have to be applied; d) that it is important for international trade that the limits shall be interpreted in the same way in every country; e) that the National Committees of the IEC which collaborate in the work of the CISPR should seek to secure the agreement of the competent authorities in their countries. Therefore, this part of CISPR 16 specifies requirements and provides guidance based on statistical techniques. EMC compliance of mass-produced appliances should be based on the application of statistical techniques that must reassure the consumer, with an 80 % degree of confidence, that 80 % of the appliances of a type being investigated comply with the emission or immunity requirements. Clause 4 gives some general requirements for this so-called 80 %/80 % rule. Clause 5 gives more specific requirements for the application of the 80 %/80 % rule to emission tests. Clause 6 gives guidance on the application of the CISPR 80 %/80 % rule to immunity tests. The 80 %/80 % rule protects the consumer from noncompliant appliances, but it says hardly anything about the probability that a batch of appliances from which the sample has been taken will be accepted. This acceptance probability is very important to the manufacturer. In Annex A, more information is given on acceptance probability (manufacturer’s risk).

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