Read Harman Kardon HS 300 (serv.man3) EMC - CB Certificate online
Report No. JSH006030124-001
Page 57 of 81
Floor standing EUT
The EUT was put on a 0.1m high wooder support, standing on the ground reference
plane(GRP) 2.6m by 1.8m, made by aluminuim 0.5mm thick.
A vertical coupling plane (VCP) 0.5m by 0.5m in size, the same material type and thickness as that
of the ground reference plane was applied ,and was connected to the GRP via a 470k
A vertical coupling plane (VCP) 0.5m by 0.5m in size, the same material type and thickness as that
of the ground reference plane was applied ,and was connected to the GRP via a 470k
Ω resistor at
each end.
The distance between EUT and any of the other metallic surface excepted the GRP, HCP & VCP
was greater than 1m.
The EUT was arranged and connected according to its functional requirements.
The distance between EUT and any of the other metallic surface excepted the GRP, HCP & VCP
was greater than 1m.
The EUT was arranged and connected according to its functional requirements.
14.3.2 Test Procedure
The EUT was arranged and connected according to its functional requirements
Direct static electricity discharges was applied only to those points and surface which are
Direct static electricity discharges was applied only to those points and surface which are
accessible to
personnel during normal usage.
The test voltage was increased from the minimum to the selected test level and with single
The test voltage was increased from the minimum to the selected test level and with single
discharge.
On each preselected points 10 times of each polarity single discharge were applied
The time interval between successive single discharges is 1s.
The ESD generator was held perpendicular to the surface to which the discharge is applied. The
discharge return cable of the generator was kept at a distance of 0.2m whilst the discharge is being
applied. During the contact discharges, the tip of the discharge electrode was touch the EUT before
the discharge switch is operated. During the air discharges, the round discharge tip of the discharge
electrode was approached as fast as possible to touch the EUT.
After each discharge, the ESD generator was removed from the EUT, the generator is then
The time interval between successive single discharges is 1s.
The ESD generator was held perpendicular to the surface to which the discharge is applied. The
discharge return cable of the generator was kept at a distance of 0.2m whilst the discharge is being
applied. During the contact discharges, the tip of the discharge electrode was touch the EUT before
the discharge switch is operated. During the air discharges, the round discharge tip of the discharge
electrode was approached as fast as possible to touch the EUT.
After each discharge, the ESD generator was removed from the EUT, the generator is then
retriggered
for a new single discharge.
Indirect discharge was conducted to objects placed near the EUT, simulated by applying the
Indirect discharge was conducted to objects placed near the EUT, simulated by applying the
dischares
of the ESD generator to a coupling plane, in the contact discharge mode.
10 times of each polarity single discharge were applied to HCP and VCP. The detail selected
10 times of each polarity single discharge were applied to HCP and VCP. The detail selected
points are
listed in the following table.
14.3.3 Photo For Test Set-up
none
14.4 Test Protocol
14.4 Test Protocol
Temperature :
23
°C
Relative Humidity:
34%
Direct discharge was applied at the following selected points:
Test point
#
Test level
[kV]
Air/
Contact
Polarity
(+/-)
Pass/
Fail
Comment
A
4
Contact
+/-
P
All touchable screws of
enclosure
enclosure
B
4
Contact
+/-
P
Accessible metal parts of the
EUT
EUT
C
8
Air
+/-
P
Air gap of the switch, button
D
8
Air
+/-
P
The air in-taking opening
E
8
Air
+/-
P
Slots around the EUT
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