Equipment & Materials

Multi-Test EMC Generators


Accomplish all common conducted immunity testing to conform with EMC (electromagnetic compliance) standards for CE marking in one multi-purpose instrument. Generate electrical disturbances for Surge (Combination wave pulse 1.2/50 - 8/20 μs), Burst/EFT (5/50 ns), and Ringwave (0.5 μs/100 kHz) as well as pass power quality compliance standards by simulating AC dips, drops, and interruptions. The EMC Shop stocks all types of multifunction generators for compliance and pre-compliance testing. Rent or buy generators for individual tests or multifunction generators to complete an assortment of tests in a compact solution. Most systems can be easily upgraded to include additional tests as required.

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Multifunction generators are typically benchtop, but heavy equipment. When doing testing on three phase power lines systems usually require much larger coupling/decoupling networks which substantially increase system size. EM test environments with ground planes with connections to earth are required to safely use transient generators.

Common Combination Wave/Surge Tests

  • IEC/EN 61000-4-5 specifies two Combination Wave pulses: Open Circuit Voltage Short Circuit Current
  • A common combination wave test is the 1.2/50 & 8/20
  • Another common wave test is the 10/700 & 5/320, or otherwise known as telecom wave
  • The four standard test levels , excluded of EUT: 0.5, 1, 2, 4 kV (0.25, 0.5, 1, 2 kA)

Common (EFT)/Burst Generator Tests

  • A typical burst has a single pulse rise time/duration of 5 ns/50 ns from a source impedance of 50 Ω
  • Bursts of 15 ms duration with a repetition rate of 5 kHz (or 100 kHz) are applied every 300 ms
  • The standard defines four basic test levels, all with repetition frequencies 5 or 100 kHz
  • The level voltage depends on equipment being tested:
  • Power ports: 0.5 , 1, 2, 4 kV
  • Signal and control ports: 0.25, 0.5, 1, 2 kV

Ring Wave Immunity Generator Tests

For compliance, the ring wave has a measured 0.5 us rise time and 100 kHz oscillation frequency This impulse is commonly used for applications related to power distribution and railway environments.

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