11/16/2018
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Recommended separation distances between portable and mobile RF communication
equipment and the 4000 Respiratory Monitor lung monitor
The 4000 Respiratory Monitor lung monitor is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled. The customer or the user of the
4000 Respiratory Monitor lung monitor can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the 4000 Respiratory Monitor lung monitor as recommended below, according
to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter
W
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz
d = 1.2
√
P
80 MHz to 800
MHz
d = 1.2
√
P
800 MHz to 2.5GHz
d = 2.3
√
P
0.01
0.1m
0.1m
0.2m
0.1
0.4m
0.4m
0.7m
1
1.2m
1.2m
2.3m
10
3.7m
3.7m
7.4m
100
11.7m
11.7m
23.3m
For transmitters rated at a maximum output power not listed above, the recommended
separation distance
d
in metres (m) can be estimated 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.
Medical Devices may be affected by cellular telephones and other personal or household devices
not intended for medical facilities. It is recommended that all equipment used near the Vitalograph
product comply with the medical electromagnetic compatibility standard and to check before use
that no interference is evident or possible. If interference is suspected or possible, switching off the
offending device is the normal solution, as is required in aircraft and medical facilities.
Medical electrical equipment needs special precautions regarding EMC and needs to be installed
and put into service according to the EMC information provided.
Portable and mobile RF communications equipment can affect medical electrical equipment.
