EMC-PARTNER ESD3000, Руководство пользователя, Страница: 55 / 66

E-ESD3000-E-Manual.doc 55/66
15 Appendix and Corrections
15.1 Appendix
15.1.1 Definition of the ESD Waveform
Level
1
2
3
4
Test
voltage
kV+-30%
2
4
6
8
Peak
current
A+-30%
7,5
15
22,5
30
Amplitude
at
30ns
A+-30%
4
8
12
16
Amplitude
at
60 ns
A+-30%
2
4
6
8
It is only possible to check the impulse current by using very expensive pieces of measuring equipment. The
price of such an instrument today lies at approx. 50 k$. In addition, persons who carry out such tests must
have some experience with high voltage and high frequency test work, so that they can interpret the
measured values. The calibration and verification of the generators must be carried out by the manufacturer
or the official calibration authorities.
wall cage
2 Ohm Target
50 Ohm
Termination
Attenuator
e.g. 20 dB
Oscillograph
50 Ohm
u2
u1
ESD-Mouse
The ESD-current produces on 2 Ohm Shunt a voltage trop u1. The 2 Ohm target is terminated with 50 Ohm
to avoid reflection. With the 20 dB attenuator the 60V trop on the 2 Ohm will be reduced to the allowed input
voltage of the oscilloscope. The memory oscilloscope must have a minimum bandwidth of 1 GHz. For all
four levels (2,4,6,8 kV) the current wave-form must be within the tolerances as specified in the IEC standard
61000-4-2.
The calibration of the ESD generator should be made at manufacturer side or at an accredited test house.
Current peak