16
Electromagnetic Immunity
The device is intended for use in the electromagnetic environment specified below.
WARNINGS
The user must ensure that it is used in that specific environment.
Failure to observe may generate risk situations.
Immunity Test
Test Level
IEC 60601
Conformity
Electromagnetic Environment - Guidance
CEI EN 61000-4-6
RF conduct
3 Veff
from 150 KHz to 80
MHz
compliant
(3 V)
(applies to the
step of charging
the batteries)
Communications equipment to portable and mobile RF should
not be used closer to any part of the device, including cables,
than the recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended separation distance
P
d
2
,
1
=
P
d
2
,
1
=
(from 80 MHz to 800 MHz)
P
d
3
,
2
=
(from 800 MHz to 2,5 GHz)
where P is the maximum rated output of the transmitter in
watts (W) according to the transmitter manufacturer and
d
is the
recommended separation distance in meters (m).Field strengths
from fixed RF transmitters, as determined by an electromagnetic
survey of the site, may be less than the compliance level in each
frequency range b.Interference may occur near of equipment
marked with the following symbol:
CEI EN 61000-4-3
RF radiated
3 V/m
From 80 MHz to
2,5 GHz
compliant
(3 V/m)
Note:
(1) At 80 MHz and 800 MHzapplies the higer range frequency.
(2) These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from
structures, objects and people.
a) The intensity field from fixed trasmitterssuch as base stations for telephones radio (cellular and cordless) and land
mobile radios, amateur radio, AM and FM radio transmitters and TV transmitters can not be predicted theoretically
with accuracy.To assess the electromagnetic environment due to fixed RF transmitters, you should consider an
electromagnetic study of the site. If the measured field strength in the place where the device is used exceeds the
applicable RF compliance level above, should be placed under observation normal operation of the device. If
abnormal performance is observed additional measures may be necessary such as reorienting or device location.
b) The field strength in the frequency range from 150 kHz to 80 MHz should be less than 3 V / m.
Thev previous table (rif.204 of standard cited) and one below (rif.206) concern the noise generated by RF transmitters (ex mobile
phones) and indicate the minimum distance to be maintained between an RF transmitter and the device, as well as how to calculate
this distance.Obviously, these directions are valid for any device generating significant RF power, such as equipment for diathermy
(Radar and Marconitherapy, that is at 2.5 GHz and 27 MHz also produce several hundreds of watts).If it is true that these
apparatuses are not constructed to radiate with Antenna in space, it is true that even if the coupling with the patient was optimal
(99%), the remaining part would still dispersed in air, and 1% to 500W is equal to 5W. This power at 27 MHz leads to calculate a
minimum distance of about 2.7 meters.
These considerations lead to the conclusion that the use of rails for Marconi and / or
radar therapy is not compatible with the use of the device.
