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Test Report
No.:
DR50120306G
5.2 Electrostatic discharge
RESULT :
Pass
5.2.1 Measurement Procedure
The immunity against electrostatic discharge was tested in accordance with
EN55020:1994+A11:1996 +A12,A13,A14:1999. 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 table top equipment, EUT was
placed on the reference plane on 80cm of insulating support. And 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 via a cable with a 470㏀(2EA) resistor. The test was made by applying contact
EN55020:1994+A11:1996 +A12,A13,A14:1999. 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 table top equipment, EUT was
placed on the reference plane on 80cm of insulating support. And 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 via a cable with a 470㏀(2EA) resistor. The test was made by applying contact
and air discharges to the EUT itself, and contact discharges to the VCP/HCP. 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 VCP. Air discharges of ±8kV were
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 VCP. Air discharges of ±8kV were
applied to various points of the EUT at non-conductive surfaces.
Severity level
: 2 (Contact Discharge)
3 (Air Discharge)
Test voltages
: ±4.0㎸ (Contact Discharge)
±
8.0㎸ (Air Discharge)
EUT Type
: Unground equipment
Number of
Contact
discharges
Number of
Air
discharges
:
>total 200 discharges(100 each at negative and positive)
> 10 discharges
Test Method
: The charge on the EUT shall be removed prior to each
applied ESD pulse.
Performance criterion
: B
5.2.2 List of Test and Measurement Instruments
Electrostatic discharge
Name of
Instrument
Model No
Serial No
Manufacturer
Next Cal.
Date
BEST EMC
BEST EMCV2.7 200122-043SC
SCHAFFNER
2003.09
ESD GUN
BEST-ESD
1072
SCHAFFNER
2003.09
PC
emachines/AC 50035 045 00056 COMPUTOWN
N/A
#683-3,Yubang-Dong, Yongin-Si,Kyunggi-Do,Korea,449-080
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