Stiegelmeyer Deka - Page 109

Appendix
EMC Info Tables
Deka
109
Recommended Protection Distances Between Portable or Mobile HF Communication De-
vices and the Bed
IMPORTANT
An electric bed is intended for use in an electromagnetic environment in which radiated HF inter-
ference is controlled. The operator or user of the bed can help to avoid electromagnetic interfer-
ence by keeping a minimum distance between the bed and any portable or mobile communica-
tions devices (transmitters) – depending on the output rating of the communications device, as
described below.
Power Rat-
ing of the
Transmitter
[W]
Protection Distance (d) Dependent on the Transmission Frequency [m]
150 kHz to 80 MHz
d = 1.2 √P
80 MHz to 800 MHz
d = 1.2 √P
80 MHz to 800 MHz
d = 2.3 √P
0.01
0.2
0.2
0.3
0.1
0.4
0.4
0.8
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For transmitters whose maximum power rating is not listed in the above table,
the distance can be determined using the equation given in the relevant column,
where P is the maximum power rating of the transmitter in watts (W) as stated by
the manufacturer of the transmitter.
Note 1:
The higher frequency range applies for 80 MHz and 800 MHz.
Note 2:
These guidelines may not be applicable in all circumstances. The propagation of
electromagnetic interference is affected by buildings, objects and people due to
absorption and reflection.