9
Radiated RF
EN 61000-4-3
3 V/m
80 MHz to 2.5 GHz
3 V/m
80 to 800 MHz
P
d
17
,
1
80 MHz to 800 MHz
P
d
33
,
2
800 MHz to 2.5 GHz
2 to 2.5 GHz
10 V/m
800 MHz to
2 GHz
where
P
is the maximum output power rating of the transmitter in watts (W) according to
the transmitter manufacturer and
d
the recommended separation distance in meters (m).
The field strengths transmitted by fixed RF transmitters, determined by an electromagnetic
measurement of the site
a
, must be less than the conformity level in each range of
frequencies.
Disturbances can occur near devices marked with this symbol:
Note 1 At 80 MHz and 800 MHz, the upper 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 medical bed (see references in contents) is used exceeds the applicable RF
compliance level above, the normal operation of the bed must be checked. If abnormal performance is observed, additional measures may be necessary, such as re-
orienting or relocating the medical bed.
B Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications equipment and the medical bed
(see references in contents)
The medical bed
(see references in contents)
is intended for use in the electromagnetic environment in which radiated RF disturbances are controlled. The user of the bed can help
prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the bed as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum power of transmitter
W
SEPARATION DISTANCE ACCORDING TO FREQUENCY OF TRANSMITTER M
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2.5 GHz
P
d
17
,
1
P
d
17
,
1
P
d
33
,
2
0.01
0.12 / 0.116
0.12 / 0.116
0.23 / 0.233
0.1
0.37 / 0.316
0.37 / 0.366
0.74 / 0.736
1
1.17 / 1.16
1.17 / 1.16
2.33 / 2.33
10
3.70 / 3.66
3.70 / 3.66
7.37 / 7.36
100
11.70 / 11.6
11.70 / 11.6
23.30 / 23.3
For transmitters rated at a maximum output power not listed above, the recommended separation distance
d
in meters (m) can be estimated using the equation applicable to the
frequency of the transmitter, where
P
is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
Note 1
At 80 MHz and 800 MHz, the separation distance for 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.
3.2.4. Equipotentiality
Under the head-half of the bed base
you will find an equipotentiality socket
,
identified by the label
, enabling you to
connect any electromedical devices.
The leads of these devices must
pass through the head end and
not the sides.
Label
Equipotentiality