Instruction Manual for the Delivery Table FREYA 3
Page 29
Electromagnetic immunity
The medical device:
Delivery Table LM-03,
is intended for use in the electromagnetic environment characterised
by the following features. The user is to ensure that the medical device:
Delivery Table LM-03
, is used in this type
of environment.
Resistance
IEC 60601-1-2
Test level
Resistance level
Explanations and guidelines
Conducted
interference
induced by radio
frequency fields
IEC 61000-4-6
Radio frequency
electromagnetic
fields
IEC 61000-4-3
3 Vrms
150 kHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz
3 Vrms
3 V/m
Portable radio devices should not be used at
the distance lower than the recommended
separation distance, determined acc. to the
appropriate formula, depending on the
transmitter frequency. This distance in
question is a distance between the
transmitter and any part of the medical
device and/or its cabling.
The recommended separation distance:
P
d
2
,
1
=
P
d
2
,
1
=
80 MHz to 800 MHz
P
d
3
,
2
=
800 MHz to 2.5 GHz
where:
P is the max. output power of the transmitter
in watts (W) acc. to the transmitter
manufacturer declaration;
d is the recommended distance in metres
(m).
The field strength of stationary radio
frequency transmitters, determined by
measurements in the installation location
a
,
should be lower than the column resistance
level within the entire frequency range
b
.
There might be interference in the medical
device functioning, if the column is being
used in the vicinity of equipment marked with
the following symbol.
Do verify whether the medical device
functions properly, when the medical device
is used in the vicinity of equipment marked
with such a symbol
a
The field strength of such stationary transmitters as: radio stations, telephone stations (mobile, wireless
telephony), land mobile radio stations, amateur radio stations, AM FM broadcasting stations, TV
transmitters cannot be estimated with sufficient accuracy. In order to evaluate the electromagnetic
radiation of radio frequency stationary transmitters, carry out measurements in the medical device
installation location:
Delivery Table LM-03.
If the electromagnetic field strength value in the installation
location of the medical device exceeds its resistance level, verify whether it functions properly. If the
medical device does not function properly, it may be necessary to carry out additional measurements,
change the medical device orientation and/or location and/or employ additional protective measures.
b
Beyond the frequency range 150 kHz to 80 MHz, the field strength should be lower than 3 V/m.
NOTE
The above explanation could not be applicable in all situations. Propagation of electromagnetic waves is subject
to absorption and reflection from buildings, objects and people.