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53
Electromagnetic immunity
The CLEAR™ series hearing aids are intended for use in the elec-
tromagnetic environment specified below. The customer or the
user of a CLEAR™ series hearing aid 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 con-
tact
± 8 kV air
± 6 kV contact
± 8 kV air
Floors should be
wood, concrete
or ceramic tile . If
floors are cov-
ered with syn-
thetic material,
the relative hu-
midity should be
at least 30 % .
Electrical
fast tran-
sients/burst
IEC
61000-4-4
± 2 kV for
power line
supplies
± 1 kV for in-
put/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 *)
immunity
Test
ieC 60601
Test level
Compliance
level
electromagnetic
environment –
guidance
Voltage
dips, short
interruptions
and voltage
variations on
power sup-
ply 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 fre-
quency
(50/60 Hz)
magnetic
field
IEC
61000-4-8
3 A/m
3 A/m
Power frequency
magnetic fields
should be at lev-
els characteristic
of a typical loca-
tion in a typical
commercial or
hospital environ-
ment
NOTE U
T
is the a .c . mains voltage prior to the application of the
test level .
*) Battery powered equipment
