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Guidance and manufacturer’s declaration – electromagnetic immunity
The bed is intended for use in the electromagnetic environment specified below. The customer or the user of the bed
should assure that it is used in such an environment.
Immunity test
IEC 606 01 test
level
Compliance
level
Electromagnetic environment - guidance
Portable and mobile RF communication s
equipment should be used no closer to any part of
the bed, including cables, than the recommended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
Conducted RF
IEC 61000-4-6
3V rms
150kHz to 80MHz
3V
d=1.2
¥
P
Radiated RF
IEC 61000-4-3
3V/m
80MHz to 2.5GHz
3V/m
d=1.2
¥
P
80 MHz to 800MHz
d=2.3
¥
P
800MHz to 2.5GHz
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 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:
NOTE 1
At 80MHz and 800MHz, 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) 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 bed is used exceeds the applicable RF
compliance level above, the bed should be observed to verify normal operation. If abnormal performance is observed
additional measures may be necessary, such as reorienting or relocating the bed.
b
Over the frequency range 150kHz to 80MHz, field strengths should be less than 3V/m.