19
Guidance and manufacture’s declaration – electromagnetic immunity
The device is intended for use in the electromagnetic environment specified below. The customer or the
user of the device should assure that it is used in such an environment.
Immunity
test
IEC 60601
test level
Compliance
level
Electromagnetic environment - guidance
Conducted
RF
IEC
61000-4-6
3 V
rms
150 kHz to 80
MHz
3 Vrms
Portable and mobile RF communications equipment
should be used no closer to any part of the device,
including cables, than the recommended separation
distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
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 meters (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:
Radiated RF
IEC
61000-4-3
3 V/m
80 MHz to 2.5
GHz
3 V/m
NOTE 1 At 80 MHz 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 (cell ular/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 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 re-orienting or relocating the device.
b) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
