BS EN 55012-2007 + A1-2009 PDF

Full title and description

BS EN 55012:2007 + A1:2009 — Vehicles, boats and internal combustion engines — Radio disturbance characteristics — Limits and methods of measurement for the protection of off‑board receivers. This publication is the British adoption of EN 55012:2007 amended by A1:2009 (identical to CISPR 12:2007/A1:2009) and specifies emission limits and measurement methods for electromagnetic disturbances from vehicles, boats and devices with internal combustion engines in order to protect external broadcast receivers.

Abstract

Specifies radio‑disturbance limits and methods of measurement for emissions in the frequency range 30 MHz to 1 000 MHz from vehicles, boats and devices driven by internal combustion engines, electric drive or both, intended to protect off‑board broadcast receivers used in residential environments. Measurement detectors (peak, quasi‑peak and average), measurement distances (reference 10 m with procedures for alternate distances such as 3 m), and procedures for ignition‑noise and suppressor assessment are included.

General information

• Status: Superseded (replaced by BS EN IEC 55012:2025).
• Publication date: Published as BS adoption 31 January 2010 (EN 55012:2007 with A1:2009). (Original EN approval 1 September 2007; amendment A1:2009).
• Publisher: British Standards Institution (BSI) / European Committee for Electrotechnical Standardization (CENELEC) origin; internationally aligned with CISPR (IEC).
• ICS / categories: 27.020 (Internal combustion engines); 33.100.10 (Emission).
• Edition / version: EN 55012:2007 with Amendment A1:2009 — referenced as BS EN 55012:2007+A1:2009.
• Number of pages: 58 pages (BS publication).

Scope

The standard applies to electromagnetic emissions from vehicles (cars, trucks, buses, agricultural and construction machinery, etc.), boats (surface vessels up to specified lengths), and devices equipped with internal combustion engines or with electric traction where applicable. It covers emission measurement methods and limit values intended to protect off‑board broadcast receivers in the 30 MHz–1 000 MHz band and includes procedures for ignition‑noise assessment, alternative antenna distances, and statistical treatment of measurement results. Exclusions and special cases (for example aircraft, traction systems, and in‑vehicle receiver protection which is covered by other standards) are also addressed.

Key topics and requirements

• Frequency range of applicability: 30 MHz to 1 000 MHz; protection aimed at off‑board broadcast receivers in residential environments.
• Defined emission limits expressed for peak, quasi‑peak and average detectors; guidance on detector selection for conformity assessment.
• Measurement geometries and distances — reference 10 m antenna distance with procedures for alternative distances (e.g., 3 m) and outdoor test site definitions.
• Methods to assess impulsive ignition noise and requirements for measuring the effectiveness (insertion loss / attenuation) of ignition‑noise suppressors.
• Reference to CISPR/IEC measurement standards (for instrumentation and site specifications), statistical analysis of measurement results and flow charts to determine applicability.
• Annexes covering normative statistical treatment, alternative limit determination, antenna/line maintenance, vehicle construction features affecting emissions, and informative guidance for testing.

Typical use and users

Used by automotive and marine OEM design and compliance teams, engine and equipment manufacturers, accredited EMC test laboratories, regulatory authorities, type‑approval bodies and suppliers of ignition‑noise suppression components. The standard is applied during R&D, pre‑compliance and formal compliance testing to demonstrate that external radio‑reception is not unacceptably affected by emissions from vehicles, boats or engines.

Related standards

Directly aligned with CISPR 12 (international text) and cross‑references measurement and instrumentation requirements to the CISPR/IEC 16 series. Related documents include CISPR 25 (in‑vehicle receiver protection), EN/IEC 61000‑4‑1 (test and measurement techniques) and later consolidated editions such as EN IEC 55012:2025 (which supersedes this publication).

Keywords

EMC, radio disturbance, vehicle emissions, boat emissions, internal combustion engine, ignition noise, quasi‑peak, peak detector, average detector, off‑board receivers, CISPR 12, measurement methods, antenna distance, outdoor test site.

FAQ

Q: What is this standard?

A: BS EN 55012:2007 + A1:2009 is the British adoption of the European standard EN 55012:2007 amended by A1:2009 (identical to CISPR 12:2007/A1:2009). It defines radio‑disturbance limits and measurement methods for vehicles, boats and devices with internal combustion engines to protect off‑board broadcast receivers.

Q: What does it cover?

A: It covers emissions in the 30 MHz to 1 000 MHz range, measurement procedures (detectors, antennas, test distances and sites), methods for dealing with impulsive ignition noise, and guidance/annexes for statistical analysis and alternative measurement arrangements. It is intended for protection of receivers in residential environments (antenna ~10 m from source).

Q: Who typically uses it?

A: Automotive and marine manufacturers, engine and equipment suppliers, EMC test laboratories, certification and type‑approval bodies, and component suppliers (for example ignition‑noise suppressor manufacturers) use the standard during design, testing and certification.

Q: Is it current or superseded?

A: BS EN 55012:2007+A1:2009 was superseded by BS EN IEC 55012:2025; the supersession (BS publication) is recorded as 24 September 2025. Users should apply the 2025 consolidated edition for current compliance requirements.

Q: Is it part of a series?

A: Yes — it is part of the CISPR/IEC family of EMC standards (CISPR 12 at international level) and references measurement technique standards in the CISPR/IEC 16 series; related automotive EMC standards include CISPR 25 and other EN/IEC EMC test standards.

Q: What are the key keywords?

A: EMC, radio disturbance, vehicles, boats, internal combustion engines, ignition noise, quasi‑peak, CISPR 12, measurement methods, off‑board receivers.