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AVR445 (Harman Kardon)
EMC Test Report
Reference No.: NK2GE 642.EMS
10. Electrostatic Discharges (EN 61000-4-2)
10.1 Test criteria and test procedure
Operating environment;
Temperature:
20 ℃
Relative Humidity:
40 %
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 10cm of insulating support
In case of table-top equipment, EUT was placed on a wooden table 0.8m above the reference planed On the
floor. A horizontal coupling plane (HCP) of 1.6*0.8m was placed on the table, and connected to the reference
plane via a cable with a 470 ㏀ resistor located in each end(0.5mm insulating support between EUT and HCP).
In both cases a vertical coupling plane (VCP) of 0.5*0.5m was located 10cm 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 each side of the
EUT, at 10cm 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 10cm from each side of the EUT.
Contact discharges of ±4kV were applied to various points of the EUT at conductive surfaces, and to the
HCP/VCP. Air discharges of ±8kV 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.
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 10cm of insulating support
In case of table-top equipment, EUT was placed on a wooden table 0.8m above the reference planed On the
floor. A horizontal coupling plane (HCP) of 1.6*0.8m was placed on the table, and connected to the reference
plane via a cable with a 470 ㏀ resistor located in each end(0.5mm insulating support between EUT and HCP).
In both cases a vertical coupling plane (VCP) of 0.5*0.5m was located 10cm 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 each side of the
EUT, at 10cm 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 10cm from each side of the EUT.
Contact discharges of ±4kV were applied to various points of the EUT at conductive surfaces, and to the
HCP/VCP. Air discharges of ±8kV 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
2006. 12
Discharge Gun
Noiseken
TCP-815P
1199C02485
2006. 12
10.2 Test Parameters
Port:
Enclosure
Test Engineer:
J. Y. Yu
Basic Standard: EN 61000-4-2:1998+A2: 2001
Performance Criteria: B
Test Level:
Air Discharge:
±4, 8kV
Contact Discharge:
±2, 4kV
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