27 28
TABLE 3
Voltage dips,
short interruptions
and voltage variations
on power supply
input lines
IEC61000-4-11
Power frequency
( 50Hz/60Hz) magnetic
field IEC61000-4-8
NOTE: UT is the a.c. mains voltage prior to application of the test level.
30A/m 30A/m
Dips: 0% UT for 0.5 cycle
at 0°, 45°,90°,135°,180°,
225°,270 and 315° 0%
UT for 1 cycle at 0°
70% UT for 25 cycles
(50Hz), 30 cycles
(60Hz) at 0°
Interruptions: 0% UT for
250 cycles (50Hz),
300 cycles (60Hz)
70% UT for 25 cycles
(50Hz), 30 cycles
(60Hz) at 0°
N/A
Interruptions: 0% UT for
250 cycles (50Hz),
300 cycles (60Hz)
Power frequency
magnetic fields should
be at levels characteristic
of a typical location in a
typical commercial
or hospital environment.
Dips: 0% UT for 0.5 cycle
at 0°,45°,90°,135°,180°,
225°,270 and 315° 0%
UT for 1 cycle at 0°
0.12 0.23
0.38 0.73
1.2 2.3
3.8 7.3
0,01
0,1
1
10
100 N/A
N/A
N/A
N/A
N/A
12 23
Recommended separation distances between portable and
mobile RF communication the equipment
The Hearing Aid is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of The Hearing Aid can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the Hearing Aid as recommended below, according to the maximum output power of the
communications equipment.
For transmitters rated at a maximum output power not listed above, the recommended separation distance
in met ers (m) can be determined using the equation applicable to the frequency of the transmitter,
where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter
manufacturer.
NOTE 1 : At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE 2 : These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.
Rated maximum output
power of transmitter
W(Watts)
Separation distance according to frequency of transmitter M (Meters)
150kHz to 80MHz
d=1.2
80MHz to 800MHz
d=1.2
80MHz to 2,5GHz
d=2.3
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