12
Technical Data
12.7 Electromagnetic interferences
Page 158
A
rt.
no.
: 0-48-
0227
Rev.:
g
DEFIGARD/PHYSIOGARD Touch 7
12.7.3
Recommended minimum distances
The DEFIGARD/PHYSIOGARD Touch 7 is intended to be used in electromagnetic
environments in which it is possible to control radiated HF interferences. The user of
the DEFIGARD/PHYSIOGARD Touch 7 can prevent electromagnetic interferences
by always keeping a minimum distance between portable/mobile HF communication
devices (transmitters) and the DEFIGARD/PHYSIOGARD Touch 7. The
recommended minimum distances are listed in the following table according to the
transmitters' max. transmitting power.
Max. transmitting
power of the
transmitter (W)
Distances according to the transmitter's frequency (m)
between 150 kHz and 80
MHz
outside of
the ISM
frequency band
between 150 kHz and
80 MHz
within
the ISM
frequency band
between 80 MHz and
800 MHz
between 800 MHz and
2.5 GHz
0.01
0.12
0.12
0.12
0.23
0.1
0.37
0.38
0.38
0.73
1
1.17
1.2
1.2
2.3
10
3.69
3.79
3.79
7.27
100
11.67
12
12
23
For transmitters with a max. transmitting power that is not listed in the above table, the recommended minimum distance d in metres (m) can
be calculated using a formula based on the transmitter's frequency, where P is the max. transmitting power of the transmitter in Watts (W)
(according to manufacturer data).
Note 1 These guidelines might not always be applicable. Electromagnetic radiation is influenced by absorption and reflection on structures,
objects and people.
Note 2
To calculate the recommended minimum distance of transmitters in the ISM frequency bands between 150 kHz and 80M
Hz and in the frequency band between 80 MHz and 2.5 GHz, the additional factor 10/3 is used to minimise the probability of interferences caused
by mobile/portable communication equipment that accidentally happens to be in the patient environment.
d
3 5
,
3
-------
P
=
d
12
10
------
P
=
d
12
10
------
P
=
d
23
10
------
P
=
