SIST EN 50715:2022

SLOVENSKI STANDARD
oSIST prEN 50715:2021
01-julij-2021
Specifikacija za merilne naprave in metode za merjenje radijskih motenj in
odpornosti - 4-3. del: Modeliranje negotovosti, statistike in mejnih vrednosti -
Statistični vidiki in določanje skladnosti z EMC serijsko proizvedenih izdelkov
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
Ta slovenski standard je istoveten z: prEN 50715:2021
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
oSIST prEN 50715:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 50715:2021

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oSIST prEN 50715:2021

EUROPEAN STANDARD DRAFT
prEN 50715
NORME EUROPÉENNE

EUROPÄISCHE NORM

May 2021
ICS
English Version
Electromagnetic compatibility - Radio frequency emission -
Statistical considerations in the determination of compliance for
mass-produced products with emission requirements
Compatibilité électromagnétique - Émissions To be completed
radiofréquences - Considérations statistiques pour la
détermination de la conformité des produits de série aux
exigences en matière d'émissions
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-07-30.

It has been drawn up by CLC/TC 210.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 68318 Ref. No. prEN 50715:2021 E

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oSIST prEN 50715:2021
prEN 50715:2021 (E)
9 Contents Page
10 European foreword . 4
11 INTRODUCTION . 5
12 1 Scope . 6
13 2 Normative references . 6
14 3 Terms and Definitions . 7
15 4 Interpretation of CISPR radio disturbance limits . 7
16 4.1 Significance of a CISPR limit . 7
17 4.2 General . 7
18 4.2.1 Equipment producing continuous disturbance . 7
19 4.2.2 Equipment producing discontinuous disturbance (clicks) . 7
20 4.3 Compliance with limits for equipment in large-scale production . 7
21 4.3.1 General . 7
22 4.3.2 Method based on a general margin to the limit . 8
23 Table 1 – General margin to the limit for statistical evaluation . 8
24 4.3.3 Test based on the non-central t-distribution . 8
25 Table 2 — Factor k for the application of the non-central t-distribution. 8
26 Figure 1 Unit-to-unit variation of the sub-range maximum . 9
27 4.3.4 Test based on the binomial distribution . 9
28 Table 3 — Application of the binomial distribution . 9
29 4.3.5 Larger sample size . 10
30 5 Definition of sub-ranges for the test based on the non-central t-distribution . 10
31 5.1 General . 10
32 5.2 Definition of subranges for products in the scope of EN 55011 . 10
33 5.3 Definition of subranges for products in the scope of EN 55014-1 . 10
34 5.4 Definition of subranges for products in the scope of EN 55015 . 11
35
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oSIST prEN 50715:2021
prEN 50715:2021 (E)
36 European foreword
37 This document [CLC standard reference] has been prepared by CLC/TC/SR/SC XX "Title".
38 This document is currently submitted to the Enquiry/ Primary Questionnaire.
39 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be
(to be confirmed or
withdrawn modified when voting)
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prEN 50715:2021 (E)
40 INTRODUCTION
41 This introduction is for information of the CENELEC NC’s only and will not be part of the final standard.
42 The creation of this standard is part of the so called “long term solution” for the problem, that the
43 European Commission does not want to list any standard under the European EMCD or RED, as long
44 as it contains a reference to the significance of CISPR-limits for type approved equipment.
45 Note: The significance of CISPR-limits for type approved equipment is that on a statistical basis at least
46 80 % of the mass-produced equipment complies with the limits with at least 80 % confidence. which
47 says that on a statistical basis at least 80 % of the mass-produced equipment shall comply with the limits
48 with at least 80 % confidence.
49 This “long term solution” contained the following steps:
50 1. CENELEC produces a separate document, containing all provisions for the statistical evaluation of
51 RFI measurements on mass produced equipment.
52 This document will not be listed under any Directive, but shall define the state of the art in Europe
53 for the evaluation of radio frequency emission of mass produced products.
54 2. CENELEC deletes all text about statistical considerations in the European versions of the CISPR
55 radio emission standards like CISPR 11, CISPR 14-1 and CISPR 15.
56 3. With these common modifications, the European radio emission standards will be again listed under
57 the EMCD and RED.
58 This standard is based on CISPR TR 16-4-3 “SPECIFICATION FOR RADIO DISTURBANCE AND
59 IMMUNITY MEASURING APPARATUS AND METHODS – Part 4-3: Uncertainties, statistics and limit
60 modelling – Statistical considerations in the determination of EMC compliance of mass-produced
61 products”
62 Additionally it contains specific provisions, given only in the product standards CISPR 11, CISPR 14-1
63 and CISPR 15.
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prEN 50715:2021 (E)
64 1 Scope
65 This document defines statistical considerations for the evaluation of radio frequency emission of mass
66 produced products.
67 Note 1 It is based on CISPR TR 16-4-3.
68 The reasons for such statistical considerations are:
69 a) that the abatement of interference aims that the majority of the products to be approved shall not
70 cause interference;
71 b) that the CISPR limits should be suitable for the purpose of type approval of mass- produced
72 products as well as approval of single-produced products;
73 c) that to ensure compliance of mass-produced products with the CISPR limits, statistical techniques
74 have to be applied;
75 d) that it is important for international trade that the limits shall be interpreted in the same way in every
76 country;
77 Therefore, this document specifies requirements and provides guidance based on statistical techniques.
78 EMC compliance of mass-produced products with the requirements of this document are based on the
79 application of statistical techniques that reassure the consumer, with an 80 % degree of confidence, that
80 80 % of the products of a type being investigated comply with the emission limits.
81 This document does not define limits or measuring methods. It can be used only after radio frequency
82 emission measurements have been performed according to the applicable radio frequency emission
83 standard.
84 Note 2 Clause 4 gives some general requirements on the interpretation of CISPR radio disturbance limits and
85 specifies different methods, which can be used alternatively. Clause 5 gives some specific requirements for certain
86 product groups.
87 Note 3 The 80 %/80 % rule protects the consumer from non-compliant products, but it says hardly anything
88 about the manufacturer’s risk, whether a type of products will be accepted during a second statistical evaluation.
89 More information on the acceptance probability for a repeated measurement is given in CISPR 16-4-3.
90 2 Normative references
91 The following documents are referred to in the text in such a way that some or all of their content
92 constitutes requirements of this document. For dated references, only the edition cited applies. For
93 undated references, the latest
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