Conducted Immunity Test Systems
Surge, EFT/burst, ring wave, voltage dips, magnetic field, and RF conducted immunity test systems, with coupling networks and measurement accessories.
Conducted immunity test systems reproducing surge, EFT/burst, ring wave, voltage dips, magnetic field, damped oscillatory wave, and aerospace voltage spike disturbances, plus RF power amplification for conducted RF immunity work.
Understanding the Test Setup
Conducted immunity covers a family of distinct disturbances, each defined by its own IEC 61000-4-x standard and requiring its own generator and coupling method.
- Surge (61000-4-5) — a surge generator plus a coupling/decoupling network (CDN) injects a high-energy 1.2/50µs impulse onto power or signal lines without damaging supporting equipment.
- EFT/burst (61000-4-4) — an EFT generator couples fast transient bursts via a capacitive coupling clamp, simulating relay switching and inductive load interruption.
- Voltage dips and interruptions (61000-4-11/4-34) — a dips/variations generator switches the EUT's supply voltage directly, no separate coupling network needed.
- RF conducted immunity (61000-4-6) — an RF signal source and power amplifier inject a modulated RF signal through a CDN onto cables, testing susceptibility to conducted RF disturbance below the frequencies where radiated testing applies.
- Magnetic field immunity (61000-4-8/4-9/4-10) — a magnetic field generator and induction coil expose the EUT to power-frequency or impulse magnetic fields.
Automotive testing (ISO 7637-2/3, ISO 16750-2) follows the same principle but with vehicle-specific pulse shapes for load dump, alternator ripple, and battery disconnect events.
