Instructions for Use
Spirostik Blue
Serial no.:
2111xxxxx
Page 88
Version: 7 | Release date: 02. August 2021
12.4.4
Recommended Safety Distances for Non-Life-Supporting
ME Systems
Recommended safety distance between portable and mobile RF communication devices
and the Spirostik Blue
The Spirostik Blue is determined for operation in an electromagnetic environment in which the
RF disturbances are controlled. The user / operator of the Spirostik Blue may help to avoid
electromagnetic interference by keeping the minimum distance between portable and mobile RF
telecommunication devices (transmitters) and the Spirostik Blue, depending on the emitted
power of the communication device as indicated below:
Power rating
of the transmitter
[W]
Safety distance,
depending on the transmitter frequency
[m]
150 kHz to 80 MHz
𝑑𝑑
=
�
3.5
𝑈𝑈
1
� √𝑃𝑃
80 MHz to 800 MHz
𝑑𝑑
=
�
3.5
𝐸𝐸
1
� √𝑃𝑃
800 MHz to 2.7 GHz
𝑑𝑑
=
�
7
𝐸𝐸
1
� √𝑃𝑃
0.01
0.12
0.04
0.07
0.1
0.37
0.11
0.22
1
1.17
0.35
0.70
10
3.70
1.11
2.21
100
11.70
3.50
7.00
For transmitters whose maximum power rating is not given in the table above, the recommended
safety distance d in meters (m) can be determined using the equations given with each column,
where P is the maximum power rating of the transmitter in watts (W) as specified by the
manufacturer.
Note 1: The higher frequency range shall be used at 80 MHz and 800 MHz.
Note 2: These guidelines may not be applicable in all cases. The propagation of electromagnetic
parameters is influenced by absorptions and reflections from buildings, objects and people.
