Widex USB LINK, User Instructions

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24
Electromagnetic immunity
The USB Link is intended for use in the electromagnetic environment specified below. The cus-
tomer or the user of a USB Link should assure that it is used in such an environment.
Immunity Test IEC 60601
Test level
Compliance
level
Electromagnetic
environment – guidance
Electrostatic
discharge (ESd)
IEc 61000-4-2
± 6 kV contact
± 8 kV air
± 6 kV contact
± 8 kV air
Floors should be wood, con-
crete or ceramic tile. If floors are
covered with synthetic material,
the relative humidity should be
at least 30 %.
Electrical fast
transients/burst
IEc 61000-4-4
± 2 kV for
power line sup-
plies
± 1 kV for input/
output lines
not
applicable *)
not
applicable *)
not applicable *)
Surge
IEc 61000-4-5
± 1 kV line(s) to
line(s)
± 2 kV line(s) to
earth
not
applicable *)
not
applicable *)
not applicable *)
Voltage dips,
short interrup-
tions and volt-
age variations
on power supply
input lines
IEc 61000-4-11
<5 %
U
T
(>95 %
dip in
U
T
) for
0.5 cycle
40 %
U
T
(60 % dip in
U
T
)
for 5 cycles
70 %
U
T
(30 % dip in
U
T
)
for 25 cycles
<5 %
U
T
(>95 % dip
in
U
T
) for 5 s
not
applicable *)
not applicable *)
power frequen-
cy (50/60 Hz)
magnetic field
IEc 61000-4-8
3 A/m 3 A/m power frequency magnetic
fields should be at levels charac-
teristic of a typical location
in a typical commercial or
hospital environment
noTE U
T
is the a.c. mains voltage prior to the application of the test level.
*) Equipment powered via USB cable