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– Electromagnetic immunity
The medizinisches Bett is intended for use in the electromagnetic environment specified below.
The customer or the user of the medizinisches Bett 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 medizinisches Bett is used exceeds the appli-
cable RF compliance level above, the medizinisches Bett should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the medizinisches Bett.
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 communica-
tions equipment and the medizinisches Bett
The medizinisches Bett is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the medizinisches Bett can help prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the medizinisches Bett as recommended below, according to the maximum output power of the
communications equipment.
Rated maximum output
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 equa-
tion 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 equip-
ment should be used no closer to any part of the
EQUIPMENT medizinisches Bett, including ca-
bles, than the recommended separation distance
calculated from the equation applicable to the fre-
quency of the transmitter.
Recommended separation distance:
where p is the maximum output power rating of
the transmitter in watts (W) according to the trans-
mitter manufacturer and d is the recommended
separation distance in metres (m).
Field strengths from fixed RF transmitters, as de-
termined by an electromagnetic site surveya,
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
39
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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