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 60601 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.
Conducted RF
IEC 61000-4-6
3V rms
150kHz to 80MHz
3V
d
P
=
1 2
.
Radiated RF
IEC 61000-4-3
3V/m
80MHz to 2.5GHz
3V/m
d
P
=
1 2
.
80 MHz to 800MHz
d
P
=
2.3
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.
746-574-AM-1
61
