User and Technical Manual: HotDog Temperature Management Controller
Page 24
of the HotDog Patient Warming System should assure that it is used in such an environment.
Immunity Test
IEC 60601
Test Level
Compliance Level
Electromagnetic Environment
–
Guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms with 6
Vrms in ISM bands
150 kHz to 80 MHz
10 V/m
80 MHz to 2,7 GHz
3 V, and 6 Vrms
10 V/m
Portable and mobile RF communications equipment should be used no
closer to any part of the HotDog Patient Warming System, including
cables, than the recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended separation distance
P
2
,
1
d
=
P
35
,
0
d
=
80 MHz to 800 MHz
P
7
,
0
d
=
800 MHz to 2,5 GHz
where
P
is the maximum output power rating of the transmitter in
watts (W) according to the transmitter manufacturer and
d
is the
recommended separation distance in metres (m). Field strengths from
fixed RF transmitters, as determined by an electromagnetic site survey,
a
should be less than the compliance level in each frequency range.
b
Interference may occur in the vicinity of equipment marked with the
following symbol:
NOTE 1 At 80 MHz and 800 MHz, 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.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur
radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the HotDog Patient Warming System is used exceeds the applicable RF compliance level above, the HotDog Patient
Warming System should be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the HotDog Patient Warming System.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications equipment
and the HotDog Patient Warming System
The HotDog Patient Warming System is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the System can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the System 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
P
2
,
1
d
=
80 MHz to 800 MHz
P
35
,
0
d
=
800 MHz to 2,5 GHz
P
7
,
0
d
=
0,01
0,12
0,04
0,07
0,1
0,37
0,11
0,22
1
1,2
0,35
0,70
10
3,7
1,1
2,2
100
12
3,5
7,0
