41
Guidance and manufacturer’s declaration – electromagnetic immunity
The digital system is intended for use in the electromagnetic environment specified below. The customer or the
user of the digital system 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
Radiated RF
IEC 61000-4-3
3 Vrms 150 kHz to
80 MHz outside
ISM bands
1)
3 V/m
80 MHz to 2.5 GHz
3 V
3)
3 V/m
Portable and mobile RF
communications equipment
should be used no closer to any
part of the digital system,
including cables, than the
recommended separation
distance calculated from the
equation applicable to the
frequency of the transmitter.
P
d
17
.
1
=
P
d
17
.
1
=
(80 MHz to 800 MHz);
P
d
33
.
2
=
(800 MHz to 2.5 GHz).
Field strengths from fixed RF
transmitters, as determined by
an electromagnetic site survey
1)
, should be less than the
compliance level in each
frequency range
2).
Interference
may occur in the vicinity of
equipment marked with the
following symbol:
1)
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
digital system is used exceeds the applicable RF compliance level above, the digital system should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the digital system.
2)
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
3)
Ensured by PC compliance with IEC 61000-4-6 requirements.
Notes:
1. At 80 MHz and 800 MHz, the higher frequency range applies.
2. These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
