CareFusion MicroLab Betriebshandbuch Seite 92

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 MicroLab is used exceeds the applicable RF compliance level above, the MicroLab
should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as re-orientating or relocating the
MicroLab.
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 MicroLab
The MicroLab is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or the user of the MicroLab can help
prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the MicroLab as
recommended below, according to the maximum output power of the communications
equipment.
Rated Maximum
Output Power of
Transmitter in
Watts (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 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.
Separation Distance in Meters (m) according to
Frequency of Transmitter
150 KHz to
80 MHz
d = 1.2√P
0.12
0.38
1.2
3.8
12
80 MHz to
800 MHz
d = 1.2√P
0.12
0.38
1.2
3.8
12
91
800 MHz to
2.5 GHz
d = 2.3√P
0.23
0.73
2.3
7.3
23.3