4
1. Important
Guidance and manufacturer’s declaration – electromagnetic immunity – for EQUIPMENT and
SYSTEMS that are not LIFE-SUPPORTING:
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the monitor 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
3 V/m
80 MHz 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 monitor,
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
80 MHz to 800 MHz
d = 1.2
¥
P
800 MHz 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).
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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:
Note
At 80 MHz and 800 MHz, the higher frequency range applies.
These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
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 monitor is used exceeds the applicable RF compliance level above,
the monitor should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as reorienting or relocating the monitor.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
