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a). Field strengths from fi xed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast
cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due
to fi xed RF transmitters, an electromagnetic site survey should be considered. If the measured
fi eld strength in the location in which the device is used exceeds the applicable RF compliance
level above, the device should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as reorienting or relocating the device.
b). Over the frequency range 150 kHz to 80 MHz, fi eld strengths should be less than 3 V/m.
Guidance and manufacturer’s declaration - electromagnetic immunity
The device is intended for use in the electromagnetic environments listed below, and should only
be used in such environments:
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, concrete or
ceramic tile. If fl oors are covered with
synthetic material, the relative humidity
should be at least 30 %.
Power frequency
(50/60 Hz)
magnetic fi eld
IEC 61000-4-8
3 A/m 3 A/m
Power frequency magnetic fi elds should
be at levels characteristic of a typical
location in a typical commercial or hospital
environment.
Recommended separation distances between portable and mobile RF communication
equipment and the device.
The device is intended for use in an electromagnetic environment where radiated RF disturbances
are under control. The user can help prevent electromagnetic interference by keeping the device
at a minimum distance from portable and mobile RF communications equipment (transmitters).
The table below details the maximum output power of the transmitter:
Rated maximum
output power of
transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
N/A
80 MHz to 800 MHz
d = 1.2
800 MHz to 2.5 GHz
d = 2.3
0.01 N/A 0.12 0.23
0.1 N/A 0.38 0.73
1 N/A 1.2 2.3
10 N/A 3.8 7.3
100 N/A 12 23
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in meters (m) can be estimated 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 refl ection from structures, objects and people.