50147-1 Pdf | En

The EN 50147-1 standard is the European benchmark for measuring the shielding attenuation of anechoic chambers and shielded enclosures. Published by CENELEC, it provides a rigorous, standardized procedure to verify that these rooms provide the electromagnetic isolation necessary for high-accuracy EMC testing. Scope and Applicability

Design and implementation implications

• Filtering and shielding: Use common-mode chokes, feed-through capacitors, shielded cabling, and bonded enclosures where tests indicate vulnerability.
• Grounding and bonding: Proper equipotential bonding and separate functional/protective earth strategies reduce susceptibility and prevent unintended currents.
• Isolation: Optical or transformer isolation on critical control and signal channels limits disturbance propagation.
• Redundancy and fail-safe design: For safety-related functions, design so that equipment either continues correct operation or enters a safe state if electromagnetic disturbances cause faults.
• Layout and routing: Keep high-speed or noisy conductors away from sensitive inputs and follow best practices for PCB layout to minimize coupling.
• Component selection: Prefer components with proven EMI performance and adequate voltage/current margins.

By following these procedures, labs ensure reproducible results that satisfy regulatory and accreditation bodies. Broad Application: en 50147-1 pdf

• IEC 61000-4-22 (Radiated emission and immunity measurements in fully anechoic chambers) — more modern
• IEEE 299 (Standard method for measuring shielding effectiveness of enclosures)
• MIL-STD-285 (older, but similar principle)