Magnetic Field Testing
Magnetic Field Immunity Testing
Magnetic Field Immunity Testing is a critical component of EMC testing, used to verify that electrical and electronic products continue to operate safely and reliably when exposed to low-frequency magnetic fields, pulsed magnetic fields, and damped oscillatory magnetic fields. As an ISO/IEC 17025 accredited laboratory, Stancer Testing-Lab performs magnetic field immunity testing to evaluate product performance under electromagnetic disturbances generated by transformers, power distribution networks, switchgear, rotating machinery, industrial equipment, and other sources of high magnetic flux commonly found in real-world environments.
By evaluating a product’s immunity to magnetic field disturbances, manufacturers can demonstrate international regulatory compliance, improve product robustness, support EMC certification, facilitate global market access, and ensure reliable performance in demanding industrial, commercial, medical, transportation, aerospace, defence, and critical infrastructure applications through accredited EMC testing and comprehensive engineering support.
Benefits of Magnetic Field Immunity Testing
- Ensures Operational Stability Near Power Equipment: Verifies that devices remain functional in proximity to transformers, switchgear, motors, and high-current conductors.
- Prevents Sensor and Control Circuit Disruption: Confirms that Hall sensors, current sensors, relays, and embedded controllers are not affected by 50/60 Hz magnetic fields.
- Validates Robustness Against High-Current Switching Events: Ensures functionality when exposed to magnetic pulses created by switching inductive loads, breakers, contactors, and fault currents.
- Protects Critical Electronics from Transient Field Effects: Confirms immunity of sensitive components such as microcontrollers, PLCs, sensors, and communication circuits.
- Mitigates Field Failures in Industrial and Utility Settings: Helps prevent operational disturbances in facilities where high-current transients are common.
Stancer Testing-Lab is equipped with complete setup for performing compliance magnetic field testing. This includes Helmholtz coils and high-performance magnetic field generators capable of producing uniform and controlled fields across the full range required by the standards.
Our Process and Testing Capabilities
For IEC/EN 61000-4-8, we generate sinusoidal magnetic fields from 50 Hz to 400 Hz, with adjustable field strengths up 1000A/m. This verifies a product’s ability to operate reliably under steady-state magnetic exposure caused by power transformers, motors, distribution systems, and other low-frequency sources.
For IEC/EN 61000-4-9, we generate pulsed magnetic fields representative of high-current switching events, fault conditions, and other transient phenomena typically found in industrial and substation applications. Our system produces controlled current impulses that create repeatable, high-intensity magnetic pulses, allowing precise verification of equipment immunity to sudden electromagnetic disturbances.
By adhering to the full requirements of IEC/EN 61000-4-8 and IEC/EN 61000-4-9, we help manufacturers demonstrate global compliance, validate product robustness, and ensure consistent performance even in environments with substantial magnetic interference.