AXOS
5
Compact immunity test System 35
12.1.3 Electrical fast transient/Burst
The HAEFELY EFT Verification Kit includes a 50 Ω and 1000 Ω attenuator as
required in the IEC 61000-4-4 standard. The appropriate attenuator is fitted to
the “Burst” coaxial output, and an oscilloscope is then connected to the output
of the attenuator. For measuring the waveform at the output of the coupling
filter, single phase and three phase adapters are available. NOTE: Be sure to
disconnect mains power from the “EUT Supply Input” before connecting the
measuring attenuators. Measuring attenuators are designed for burst voltages
only and will be destroyed if subjected to AC/DC voltage.
Figure 12-3: EFT Verification Kit
12.1.4 Burst verification adapter
Additionally, an EFT verification adapter is available for testing of every single
phase (L, N, PE front view from AXOS
5
). It gets connected with the PE pin
(Pos.12 Figure 5-1) and every single phase (L, N, PE Figure 5-1). The BNC
output of the burst adapter is then connected to the oscilloscope. Do not
connect “EUT Supply Input” to power supply, when verification of burst output.
Figure 12-4: Burst verification adapter
12.2
Calibration
Calibration period of the AXOS
5
has to be determined by the user, and depends on the intensity of use and end user
requirements. Typically, a calibration is recommended every 2 years. The AXOS
5
is factory calibrated before shipped
and supplied with the calibration certificate.
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