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11. EMC table
Conducted RF
3 Vrms
IEC 61000-4-6
150kHz - 80 MHz
Radiated RF
3 V/m
IEC 61000-4-3
80 MHz - 2.5 GHz
d is the recommended separation distance in metres (m).
P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
a) 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 a Field strengths from fixed transmitters, such as base stations for radio, (cellular/
cordless) telephones, 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 is used exceeds the
applicable RF compliance level above, the Medical Bed should be observed to verify normal operation. 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.
NOTE 1 Interference may occur in the vicinity of equipment marked with the following symbol:
NOTE 2 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 3 These guidelines may not apply in all situations.
Electromagnetic propagation is affected by absorption and reflection from structures, objects and people.
11.4 Recommended Separation Distances between portable and mobile RF
communications equipment and the Medical Bed
The Medical Bed is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the Medical Bed can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the Medical Bed as recommended below,
according to the maximum output power of the communications equipment.
Rated
Maximum
Output Power
of transmitter
150 kHz to 80 MHz
(W)
0.01
0.12
0.1
0.37
34
3 V
Portable and mobile RF communications equipment should be
used no closer to any part of the Medical Bed, including cables,
than the recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended separation distance
3 V/m
Separation Distance
according to frequency of transmitter
( m )
80 MHz to 800 MHz
0.40
1.26
80 MHz to 800 MHz
800 MHz to 2.5 GHz
800MHz to 2.55 GHz
0.40
1.26
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