Werbung
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
IEC 61000-4-6
Radiated RF
3 V/m
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 refl ection from structures, objects and
people.
a
Field strengths from fi xed 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 fi xed RF
transmitters, an electromagnetic site survey should be considered. If the measured fi eld strength in the location in which the medizinisches Bett
is used exceeds the applicable 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, fi eld strengths should be less than [V
Recommended separation distances between portable
and mobile RF communications 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 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 absorp-
tion and refl ection from structures, objects and people.
Compliance level
3 V
3 V/m
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
80 MHz to 800 MHz
3,5
d = [
] P
d = [
V
1
0.12
0.12
0.37
0.37
1.17
1.17
3.69
3.69
11.67
11.67
Electromagnetic environment – guidance
Portable and mobile RF communications equipment should be used no closer
to any part of the EQUIPMENT medizinisches Bett, including cables, than the
recommended separation distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance:
80 MHz to 800 MHz
800 MHz to 2,5 GHz
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
distance in metres (m).b
Field strengths from fi xed 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:
] V/m.
1
800 MHz to 2,5 GHz
3,5
7
] P
d = [
E
E
1
0.23
0.74
2.33
7.38
23.33
] P
1
51
Werbung
