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– Electromagnetic immunity
The nursing care bed is intended for use in the electromagnetic environment specified below.
The customer or the user of the nursing care bed should assure that it is used in such an environment.
Immunity test
IEC 60601 test level
Conducted RF
3 V 150kHz-80MHz
IEC 61000-4-6
.............................................
Radiated RF
3 V/m 80MHz-2500MHz
IEC 61000-4-3
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection form 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, en electromagnetic site survey should be considered. If the measured field strength in the location in which the nursing care
bed is used exceeds the applicable RF compliance level above, the nursing care bed should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or relocating the nursing care 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 commu-
nications equipment and the nursing care bed
The nursing care bed is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the nursing care bed can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the nursing care bed as recommended below, according to the maximum
output power of the communications equipment.
Rated maximum out-
put of transmitter W
0,01
0,1
1
10
100
For transmitters rated at a maximum output power not listed above the recommended separation distance d in metres (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.
Compliance level
3 V 150kHz-80MHz
..........................................
3 V/m 80MHz-2500MHz
Separation distance according to frequency of transmitter m
150 kHz to 80 MHz
3,5
�� = [
] √ ��
3
0,12
0,37
1,17
3,69
11,67
Electromagnetic environment - guidance
Portable and mobile RF communications
equipment should be used no closer to any
part of the EQUIPMENT nursing care bed, in-
cluding cables, than the recommended sepa-
ration distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance:
�� = [
where p is the maximum output power rating
of the transmitter in watts (W) according to
the transmitter manufacturer and d is the rec-
ommended separation distance in metres (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site sur-
veya, should be less than the compliance
level in each frequency rangeb.
Interference may occur in the vicinity of equip-
ment marked with the following symbol:
80 MHz to 800 MHz
3,5
�� = [
] √ ��
3
0,12
0,37
1,17
3,69
11,67
62
3,5
�� = [
] √ ��
150 kHz to 80 MHz
3
3,5
�� = [
] √ ��
80 MHz to 800 MHz
3
7
] √ ��
800 MHz to 2,5 GHz
3
800 MHz to 2,5 GHz
7
�� = [
] √ ��
3
0,23
0,74
2,33
7,38
23,33
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