CareFusion SpiroUSB Manuel D'utilisation page 32

Recommended separation distances between
portable and mobile RF communications equipment and the SpiroUSB
The SpiroUSB is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or the user of the SpiroUSB can help
prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the SpiroUSB
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 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
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
30
800 MHz to
2.5 GHz
d = 2.3√P
0.23
0.73
2.3
7.3
23.3