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5 Preparation for Operation
5.1 Attention, Refer to Manual
This manual is an integral part of the ESD3000. The safety rules and precautions in the manual must
be observed. EMC PARTNER and their representatives accept no responsibility not responsible for
damages to persons and equipment as a results of non-observation of the safety rules and
precautions in this manual.
5.1.1 ESD test set up
Ports which must be tested:
Enclosure Ports include operational keys, displays, ground and earth points, metallic parts such as
connector etc.
Coupling path:
Basically all types of coupling exists during static discharges. Practical experience shows that, for the most
electronic equipment, the current is the dominant parameter.
In practice the current path of the discharge current plays a important role e.g. if secondary sparks or
breakdown in the UET occur the test is no longer reproducible.
The frequencies contained in the ESD discharge current are higher than in the EFT spike impulse. As a
consequences, reproducibility of the ESD test is more difficult than the reproducibility of the EFT test results.
The ESD test is one of the most complex transient test.
Test set-up:
As shown by the example in the IEC document 61000-4-2 the same test set up can be used for all different
discharge mode (contact-, air- and indirect-discharge). Under the table lays the reference ground plan and
on the table is the horizontal coupling plane placed.
The test mode used depends on the test object.
The three different kinds of test object are:
Metallic equipment under test
EUT
Combination such as metal
case, insulated keyboard
Insulated EUT plastic, paint,
varnish
I I I I
I
I -<----<----<---- -----<----I I---------> --->---->---->--I
I
with contact possibility
I
with discharge ----<-----<
I
voltage test with IEC finger and
Vmax
I I I
I I I
I
I
without contact possibility
I
without discharge
( breakdown)
I I I
Discharge directly contacted
with relay tip
Air discharge with IEC finger.
Holding time 5 seconds.
Indirect test with coupling plane
and relay
direct discharge air discharge indirect discharge