73
Guidance and manufacture’s declaration-electromagnetic immunity
The device is intended for use in the electromagnetic environment listed below, and should only be
used in such environments:
Immunity test
IEC 60601
test level
Compliance
level
Electromagnetic environment -
guidance
Conducted RF
IEC61000-4-6
Radiated RF
IEC61000-4-3
3Vrms
150KHz to 80MHz
10V/m
80MHz to 2.5GHz
3Vrms
3V/m
Portable and mobile RF communica-
tions equipment should be used no clo-
ser to any part of the device, including
cables, than the recommended separa-
tion distance calculated from the equa-
tion applicable to the frequency
of the transmitter.
Recommended separation distance
80MHz to 800MHz
800MHz to 2.5GHz
Where
P
is the maximum output power
rating of the transmitter in watts (W) ac-
cording to the transmitter manufacturer
and
d
is the recommended separation
distance in meters (m).
Field strengths from fixed RF transmit-
ters, as determined by an electroma-
gnetic site survey,
a
should be less than
the compliance level in each frequency
range.
b
Interference may occur in the vicinity of
equipment marked with
the following symbol:
NOTE 1 At 80MHz and 800 MHz, 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.
a Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telepho-
nes 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 fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured field strength in
the location in which the device is used exceeds themapplicable RF compliance level above, the de-
vice 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, field strengths should be less than 3V/m.
3.5
V
1
√P
d
=
3.5
E
1
√P
d=
7
E
1
√P
d=
