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Anam Electronics Co., Ltd.
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HK3390/230
EMC Test Report
Reference No.:NK08E066
6. Electrostatic Discharges
6.1 Test Procedure
A ground reference plane was located on the floor, and connected to earth via a low impedance
connection. The return cable of the ESD generator was connected to the reference plane. In case of
a floor standing equipment, EUT was placed on the reference plane on 0.1 m of insulating support.
In case of table-top equipment, EUT was placed on a wooden table 0.8 m above the reference plane.
A horizontal coupling plane(HCP) of 1.6 m x 0.8 m was placed on the table, and connected to the reference
a floor standing equipment, EUT was placed on the reference plane on 0.1 m of insulating support.
In case of table-top equipment, EUT was placed on a wooden table 0.8 m above the reference plane.
A horizontal coupling plane(HCP) of 1.6 m x 0.8 m was placed on the table, and connected to the reference
plane via a cable with a 470 ㏀ resistor located in each end(0.5 mm insulating support between EUT
and HCP). In both cases a vertical coupling plane (VCP) of 0.5 m x 0.5 m was located 0.1 m from the
EUT’s sides. The VCP was connected to the reference plane in the same matter as the HCP. The
test was done by applying contact and air discharges to the EUT itself, and contact discharges to the HCP
and VCP. When applying the discharges to the HCP, the tip of the generator was located at the front edge
of each HCP opposite the center point of the EUT, at 0.1 m distance. When applying the discharges to the
VCP the tip of the generator was located at the middle edge of the VCP. The VCP was located 0.1 m from
each side of the EUT. Contact discharges up to ± 4 kV were applied to various points of the EUT at
conductive surfaces, and to the HCP/VCP. Air discharges up to ± 8 kV were applied to various points of
the EUT at non-conductive surfaces.
Ungrounded equipment, or ungrounded part(s) of equipment, cannot discharge itself similarly to class I
mains-supplied equipment. If the charge is not removed before the next ESD pulse is applied, it is
possible that the EUT or part(s) of the EUT be stressed up to twice the intended test voltage. Therefore,
double-insulated equipment could be charged at an unrealistically high charge, by accumulating several
ESD discharges on the capacitance of the class II insulation, and then discharge at the breakdown voltage
of the insulation with a much higher energy. In the case of class II & III equipment, to avoid of unrealistically
high charge, it is possible to ionize “using ionizer” before each discharge.
Instrumentation used during this session:
and HCP). In both cases a vertical coupling plane (VCP) of 0.5 m x 0.5 m was located 0.1 m from the
EUT’s sides. The VCP was connected to the reference plane in the same matter as the HCP. The
test was done by applying contact and air discharges to the EUT itself, and contact discharges to the HCP
and VCP. When applying the discharges to the HCP, the tip of the generator was located at the front edge
of each HCP opposite the center point of the EUT, at 0.1 m distance. When applying the discharges to the
VCP the tip of the generator was located at the middle edge of the VCP. The VCP was located 0.1 m from
each side of the EUT. Contact discharges up to ± 4 kV were applied to various points of the EUT at
conductive surfaces, and to the HCP/VCP. Air discharges up to ± 8 kV were applied to various points of
the EUT at non-conductive surfaces.
Ungrounded equipment, or ungrounded part(s) of equipment, cannot discharge itself similarly to class I
mains-supplied equipment. If the charge is not removed before the next ESD pulse is applied, it is
possible that the EUT or part(s) of the EUT be stressed up to twice the intended test voltage. Therefore,
double-insulated equipment could be charged at an unrealistically high charge, by accumulating several
ESD discharges on the capacitance of the class II insulation, and then discharge at the breakdown voltage
of the insulation with a much higher energy. In the case of class II & III equipment, to avoid of unrealistically
high charge, it is possible to ionize “using ionizer” before each discharge.
Instrumentation used during this session:
Instruments Manufacturer
Model
Serial number
Due to Calibration
ESD Simulator
Noiseken
ESS-2000
0199C02406
2008.12
Discharge Gun
Noiseken
TC-815P
1199C02485
2008.12
6.2 Test Parameters
Port:
Enclosure
Basic Standard:
EN 61000-4-2:1995+A1:1998+A2:2001
Performance Criteria: B
Performance Results :
A
Test Engineer:
Jin-ha, Ko
Test Level
Air Discharge:
± 8 kV
Contact
Discharge:
± 4 kV
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