Beurer BC 57 Instructions For Use Manual page 140

Guidance and manufacture's declaration – electromagnetic immunity
in the location in which the BC 57 is used exceeds the applicable RF compliance level above, the BC 57 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 57.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
For ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
Recommended separation distances between portable and mobile RF communications equipment and the BC 57
The BC 57 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer
or the user of the BC 57 can help prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the BC 57 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 affected by absorption and reflection
from structures, objects and people.
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d = 1.2
0.12
0.38
1.2
3.8
12
140
(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