Beurer medical BC 31 Mode D'emploi page 90

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 BC 31 is used exceeds the applicable RF compliance level above, the BC 31 should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating the BC 31.
b
Over the frequency range 150 kHz to 80 MHz, fi eld strengths should be less than 3 V/m.
Table 4
For ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
Recommended separation distances between portable and mobile RF communications equipment and the BC 31
The BC 31 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer
or the user of the BC 31 can help prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the BC 31 as recommended below, according to the maximum output
power of the communications equipment.
Rated maximum output
power 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 meters (m) can be
determined 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 aff ected by absorption and refl ection
from structures, objects and people.
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
Not applicable
–
–
–
–
–
90
(m)
80 MHz to 800 MHz
d = 1.2
0.12
0.38
1.2
3.8
12
800 MHz to 2.5 GHz
d = 2.3
0.23
0.73
2.3
7.3
23