ISO 11452-2-2019 PDF

Full title and description

ISO 11452-2:2019 — Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 2: Absorber-lined shielded enclosure. This part of ISO 11452 specifies an absorber-lined shielded enclosure (ALSE) method for evaluating the immunity of vehicle electronic components and their associated wiring harnesses to continuous narrowband radiated electromagnetic fields.

Abstract

This standard defines the ALSE test method: the device under test (DUT), together with a prototype or standard harness, is exposed to controlled narrowband electromagnetic disturbances generated inside an absorber-lined shielded enclosure. Peripheral equipment may be placed inside or outside the enclosure. The method is intended to reproduce off-vehicle radiation coupling mechanisms and is used together with the general conditions and definitions given in ISO 11452‑1.

General information

• Status: Published (current edition at time of publication).
• Publication date: January 2019.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 33.100.20, 43.040.10.
• Edition / version: Edition 3 (2019).
• Number of pages: 37 pages.

(General bibliographic details above are taken from ISO registry information for ISO 11452‑2:2019.)

Scope

ISO 11452‑2:2019 applies to immunity testing of electronic components used in passenger cars and commercial vehicles regardless of propulsion type (internal combustion, hybrid or electric). It addresses immunity to continuous narrowband radiated electromagnetic energy by specifying the ALSE configuration, calibration and test procedures; it is intended to be used with the general test conditions and definitions provided in ISO 11452‑1. The method reproduces off‑vehicle radiated coupling into the DUT and harness and is not intended for transient broadband disturbances.

Key topics and requirements

• Definition and configuration of an absorber-lined shielded enclosure (ALSE) including absorber placement and optional floor ferrite treatment.
• Requirements for field generation: choice of antennas/amplifiers to achieve specified field strengths and polarizations at the DUT location.
• Field measurement and calibration: electrically small field probes (three‑axis/isotropic) and calibration procedures to ensure reproducible field levels.
• DUT mounting and harness arrangement rules (prototype vs. standard test harness) to reproduce realistic coupling conditions.
• Use of artificial networks (AN, HV‑AN, AMN, AAN) and grounding/shielding practices as referenced from ISO 11452‑1.
• Specified frequency coverage and test levels for narrowband radiated immunity (practical implementations typically span from tens of MHz into the GHz region depending on DUT class — e.g., many labs test roughly 80 MHz up to multiple GHz per application requirements).
• Performance criteria and monitoring: functional verification of DUT during exposure and classification of observed degradation or failure modes.
• Calibration and repeatability guidance to align ALSE results with open‑field or other test methods where applicable.

Key method and apparatus details, and the role of ISO 11452‑1 for general conditions, are described in the ISO text and industry test guidance. Practical frequency coverage and field strengths used in implementations are discussed in test-lab and industry summaries.

Typical use and users

Primary users are automotive OEMs, Tier‑1 and Tier‑2 electronic suppliers, independent EMC test laboratories and design teams performing component-level immunity verification early in product development. The ALSE method is used to validate electronic control units (ECUs), sensors, actuators and modules (and their harness interfaces) against realistic radiated narrowband threats expected in vehicle environments. Regulators and certification bodies reference ISO 11452 series methods when assessing EMC compliance for road vehicle components.

Related standards

ISO 11452‑2 is part of the ISO 11452 series of component‑level immunity tests. Closely related documents include ISO 11452‑1 (general principles and terminology), ISO 11452‑4 (harness excitation methods such as Bulk Current Injection and Tubular Wave Coupler), and other parts of the ISO 11452 family addressing magnetic fields, portable transmitters and specific coupling methods. Automotive EMC testing also references IEC/EN 61000‑4‑3 (radiated immunity), CISPR 25 (vehicle and component emission limits), ISO 16750 (environmental testing for electrical/electronic equipment), and industry-specific procedures (e.g., SAE J1113 series) where interoperability between standards is required.

Keywords

absorber-lined shielded enclosure, ALSE, radiated immunity, component test, narrowband, vehicle electronics, wiring harness, DUT, electromagnetic compatibility (EMC), ISO 11452 series, field calibration, artificial network.

FAQ

Q: What is this standard?

A: ISO 11452‑2:2019 specifies the absorber‑lined shielded enclosure (ALSE) test method for assessing the immunity of vehicle electronic components and their harnesses to continuous narrowband radiated electromagnetic energy.

Q: What does it cover?

A: It covers ALSE configuration, field generation and measurement, DUT and harness placement, use of artificial networks and calibration procedures for narrowband radiated immunity testing; general conditions (temperature, supply, dwell time, performance criteria) are taken from ISO 11452‑1.

Q: Who typically uses it?

A: Automotive OEMs, suppliers of ECUs and modules, EMC test laboratories and design verification teams use this standard to validate component immunity and to reproduce off‑vehicle radiated interference scenarios.

Q: Is it current or superseded?

A: ISO 11452‑2:2019 is the published (3rd) edition from January 2019. ISO has an approved work item for a subsequent revision (ISO/AWI 11452‑2) indicating ongoing maintenance and potential future update; users should verify the latest status with their national standards body or ISO registry for any updates after 2019.

Q: Is it part of a series?

A: Yes — ISO 11452 is a multipart series addressing component‑level immunity to narrowband radiated energy. Related parts include ISO 11452‑1 (general principles), ISO 11452‑4 (harness excitation methods / BCI & TWC), ISO 11452‑8, ISO 11452‑9, etc.; the series covers multiple coupling mechanisms and test methods used in automotive EMC.

Q: What are the key keywords?

A: absorber-lined shielded enclosure, ALSE, radiated immunity, narrowband, component test, wiring harness, DUT, calibration, artificial network, automotive EMC.