CISPR 16-4-2-2018 PDF

Full title and description

CISPR 16-4-2:2011/AMD2:2018 — Specification for radio disturbance and immunity measuring apparatus and methods — Part 4-2: Uncertainties, statistics and limit modelling — Measurement instrumentation uncertainty. This entry represents Amendment 2 consolidated into the Part 4-2 publication (edition 2.0) and updates the uncertainty modelling and measurement-instrumentation uncertainty requirements used for EMC measurements.

Abstract

This amendment clarifies and extends the methods for evaluating and reporting measurement instrumentation uncertainty for radio disturbance and immunity tests. It addresses uncertainty budgets, statistical treatment, and limit‑modelling approaches (including revised U‑values) relevant to EMC measurements—with emphasis on conducted disturbance and magnetic‑field measurement configurations (notably in the 9 kHz–30 MHz range). The document is intended to be used with the CISPR 16 series of basic EMC publications.

General information

• Status: Amendment (consolidated edition) / Active international CISPR/IEC publication.
• Publication date: 15 August 2018 (Amendment 2; consolidated as edition 2.0).
• Publisher: International Electrotechnical Commission (IEC) / CISPR technical committee.
• ICS / categories: 33.100.10; 33.100.20 (Electromagnetic compatibility — emission and immunity measurement methods).
• Edition / version: Edition 2.0 (CISPR 16-4-2:2011 + AMD1:2014 + AMD2:2018 consolidated).
• Number of pages: 38 pages (English/French bilingual consolidated document; corrigendum published subsequently).

Key bibliographic/status details above are taken from the IEC consolidated publication record and international national‑adoption notices.

Scope

The standard (Amendment 2 to CISPR 16‑4‑2) specifies how to model and quantify measurement instrumentation uncertainty for EMC disturbance and immunity measurements. It covers uncertainty component identification and combination, statistical treatment of measurement data, limit‑modelling methods used when comparing measurement results with limits, and guidance on reporting uncertainty (including recommended U‑values and uncertainty budgets for common measurement configurations, with particular guidance for conducted disturbances and magnetic‑field methods in the low‑frequency range). The amendment is intended to be applied alongside other parts of CISPR 16 that define measurement apparatus and methods.

Key topics and requirements

• Definition and modelling of measurement instrumentation uncertainty (uncertainty component identification and propagation).
• Statistical methods for processing measurement results and estimating repeatability and reproducibility.
• Limit‑modelling approaches for relating measured values and uncertainty to pass/fail limits.
• Updated uncertainty budgets and recommended U‑values for common EMC measurement configurations.
• Specific guidance for conducted disturbance and magnetic‑field measurements (including typical frequency ranges such as 9 kHz–30 MHz).

These topics reflect the amendment’s focus on harmonising uncertainty assessment across EMC test methods and improving consistency of reported measurement uncertainty.

Typical use and users

Applied by EMC test laboratories, equipment manufacturers, calibration laboratories, accreditation bodies, standards developers, and compliance engineers to: build or update uncertainty budgets; assess measurement capability; interpret measurement results against regulatory or product limits; and document measurement uncertainty in test reports used for compliance and product certification. Users typically apply this part in combination with other CISPR 16 parts detailing the measurement setups and instrumentation.

Related standards

CISPR 16‑4‑2 is part of the CISPR 16 series (basic EMC publications) and is used alongside related parts such as CISPR 16‑1‑1, CISPR 16‑1‑2, CISPR 16‑2‑1 and CISPR 16‑4‑1 which cover performance of measurement apparatus, site validation, antenna and probe calibration, and related uncertainty topics. The 2018 amendment is accompanied by Corrigendum 1 (published January 2019) which corrects editorial/technical items in the amendment.

Keywords

EMC; CISPR 16; measurement uncertainty; instrumentation uncertainty; statistics; limit modelling; uncertainty budget; conducted disturbance; magnetic field; 9 kHz–30 MHz; amendment 2018; corrigendum 2019.

FAQ

Q: What is this standard?

A: CISPR 16‑4‑2:2011/AMD2:2018 is Amendment 2 to Part 4‑2 of the CISPR 16 series, providing requirements and guidance for measurement instrumentation uncertainty used in radio‑disturbance and immunity measurements.

Q: What does it cover?

A: It covers uncertainty modelling, statistical treatment of measurement data, uncertainty budgets, recommended U‑values, and limit‑modelling methods—aimed at ensuring consistent reporting and interpretation of EMC measurement results (with specific examples for conducted and low‑frequency magnetic‑field measurements).

Q: Who typically uses it?

A: EMC test houses, manufacturers performing EMC testing, calibration labs, accreditation bodies, and engineers responsible for compliance testing and test‑reporting use this document alongside other CISPR 16 parts.

Q: Is it current or superseded?

A: The 2018 Amendment 2 was published 15 August 2018 and a Corrigendum (COR1) was issued in January 2019 to correct items in the amendment; the consolidated edition (edition 2.0 including amendments) remains the authoritative reference for Part 4‑2 as published by IEC. Check the IEC Webstore or national standard bodies for any later revisions.

Q: Is it part of a series?

A: Yes — it is part of the CISPR 16 series of basic EMC publications, which together define measurement apparatus, methods, site validation, and uncertainty/statistical procedures for EMC emission and immunity testing.

Q: What are the key keywords?

A: EMC, measurement uncertainty, uncertainty budget, measurement instrumentation, statistics, limit modelling, CISPR 16, conducted disturbance, magnetic field.