20
Guidance
and
manufacturer’s
declaration-electromagnetic
immunity
The device(s) is intended for use in the electromagnetic environment specified below.
The customer or the user of the device(s) should assure that is used in such and environment.
Immunity
test
IEC
60601
test
level
Compliance
level
Electromagnetic
environment-guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 KHz to 80 MHz
3 V/m
80MHz to 2,5 GHz
3 Vrms
3 V/m
Portable and mobile RF communications equipment
should be used no closer to any part of the
device(s) including cables, than the recommended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended
separation
distance:
d = 1,2
√𝑃
d = 1,2
√𝑃
80MHz to 800 MHz
d = 2,3
√𝑃
800MHz to 2,5 GHz
Where
P
is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and
d
is the recommended separation
distance in metres (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic 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:
NOTE1
At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE2
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) 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 fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the device(s) is used exceeds the applicable RF compliance level above, the device(s) should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating the
device(s).
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.