User Manual MUT_RD_009H_GB Page
17
of 43
It is important that fixed RF transmitter field intensity,
determined by an electromagnetic investigation on site
a
,
be less than the compliance levels, for each frequency
range
b
Interferences may occur close to the device marked with
the following symbol:
Note 1: at 80 MHz and at 800 MHz, the highest frequency range applies.
Note 2: These directives may not apply in all cases. Electromagnetic propagation is affected by
absorption and reflection of structures, objects and persons.
a
The field intensities of fixed transmitters, such as base stations for radiotelephones (cellular) and
terrestrial mobile radios, amateur radio, MA and MF radio, and TV diffusion, cannot be theoretically
predicted with accuracy. To assess the electromagnetic environment produced by the fixed RF
transmitters, an electromagnetic investigation must be conducted on site. If the field intensity,
measured at the location where the medical device is being used, exceeds the above applicable RF
compliance level, the medical device must be checked for normal operation. If abnormal performances
are observed, it may be necessary to take additional measures, such as reorienting or repositioning the
medical device.
b
As pertains to the frequency range from 150 kHz to 80 MHz, the field intensities must be less than 3
V/m.
Recommended separation distances between RF communication
mobile devices and medical device
The medical device is intended for use in an electromagnetic environment in which RF radiated
emissions are controlled. The customer or medical device user can contribute to preventing
electromagnetic interferences by maintaining a minimal distance between the mobile device/RF mobile
communication device and medical device, as recommended below, in function of the maximal
emission power of the mobile communication device.
Maximum rated
output power of
the transmitter
(in W)
Separation distance depending on the transmitter frequency (in m)
from 150 kHz to 80 MHz
d = [3.5/3]
√𝑃
from 80 MHz to 800
MHz
d = [3.5/3]
√𝑃
from 800 MHz to 2.5
GHz
d = [3.5/3]
√𝑃
0.01
0.12
0 .12
0.23
0.1
0.37
0.37
0.74
1
1.17
1.17
2.34
10
3.7
3.7
7.4
100
11.7
11.7
23.4
For transmitters whose maximum rated output power is not indicated in the above table, the
recommended separation distance
d
in meters (m) can be assessed by using the equation applicable to
the transmitter frequency, where
P
is the transmitter maximal output power in watts (W), according to
the transmitter’s manufacturer.
Note 1: at 80 MHz and at 800 MHz, the separation distance for the highest frequency range applies.