E
xclusive
C
ertification
C
orp
.
Tel:886-2-2792-3366 Fax:886-2-2792-1100
Issued date: Dec. 16, 2003
14 of 14
EMC
Test Report: CE03111004-A
7.2.
Test Procedure
a. In the case of air discharge testing the climatic conditions shall be within the following ranges:
- ambient temperature: 15 to 35 ;
℃
℃
- relative humidity : 30
％
to 60
％
;
- atmospheric pressure : 68 KPa (680 mbar) to 106 KPa (1060 mbar).
b. Test programs and software shall be chosen so as to exercise all normal modes of operation of the
EUT. The use of special exercising software is encouraged, but permitted only where it can be
shown that the EUT is being comprehensively exercised.
c. The test voltage shall be increased from the minimum to the selected test severity level, in order to
determine any threshold of failure. The final severity level should not exceed the product
specification value in order to avoid damage to the equipment.
d. The test shall be performed with both air discharge and contact discharge. On preselected points at
least 10 single discharges (in the most sensitive polarity) shall be applied on air discharge. On
preselected points at least 25 single discharges (in the most sensitive polarity) shall be applied on
contact discharge.
e. For the time interval between successive single discharges an initial value of one second is
recommended. Longer intervals may be necessary to determine whether a system failure has
occurred.
f. In the case of contact discharges, the tip of the discharge electrode shall touch the EUT before the
discharge switch is operated.
g. In the case of painted surface covering a conducting substrate, the following procedure shall be
adopted :
If the coating is not declared to be an insulating coating by the equipment manufacturer, then the
pointed tip of the generator shall penetrate the coating so as to make contact with the
conducting substrate.
Coating declared as insulating by the manufacturer shall only be submitted to the air discharge.
The contact discharge test shall not be applied to such surfaces.
h. In the case of air discharges, the round discharge tip of the discharge electrode shall be approached
as fast as possible (without causing mechanical damage) to touch the EUT . After each discharge, the
ESD generator (discharge electrode) shall be removed from the EUT. The generator is then
retriggered for a new single discharge. This procedure shall be repeated until the discharges are
completed. In the case of an air discharge test, the discharge switch, which is used for contact
discharge, shall be closed.