16 Guidelines and manufacturer’s declaration
ASTOTHERM PLUS Instructions for Use
51
Guidance and manufacturer's declaration - electromagnetic immunity
The ASTOTHERM PLUS is intended for use in the electromagnetic environment specified below.
The customer or user of the ASTOTHERM PLUS should assure that it is used in such an environment.
Immunity test
Test level
Compliance
level
Electromagnetic environment
– guidance
Recommended separation distance
Conducted
disturbances induced
by RF fields
IEC/EN 61000-4-6
3 Vrms
0.15 MHz to 80 MHz
6 Vrms in ISM bands
between 0.15 MHz
and 80 MHz
80 % AM at 1 kHz
in compliance
P
d
2
.
1
Radiated RF EM
fields
IEC/EN 61000-4-3
3 V/m
80 MHz to 2.7 GHz
80 % AM at 1 kHz
in compliance
P
d
2
.
1
80 MHz to 800 MHz
P
d
3
.
2
800 MHz to 2.7 GHz
Portable and mobile RF communications equipment should be used no closer to any part of the ASTOTHERM PLUS,
including cables, than the recommended separation distance calculated from the equation applicable to frequency of the
transmitter.
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 meters (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:
NOTE1. At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE2. 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 ASTOTHERM PLUS is used exceeds the applicable
RF compliance level above, the ASTOTHERM PLUS should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or relocating the ASTOTHERM
PLUS.
b
Over the frequency range 150 kHz to 80 MHz, field strength should be less than 3 V/m.
Recommended separation distances between
Portable and mobile RF communications equipment and the ASTOTHERM PLUS
The ASTOTHERM PLUS is intended for use in the electromagnetic environment in which radiated RF disturbances are
controlled. The customer or user of the ASTOTHERM PLUS can help prevent electromagnetic interference by maintaining
a minimum distance between portable and mobile RF communications equipment (transmitters) and the ASTOTHERM
PLUS 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
d
2
.
1
80 MHz to 800 MHz
P
d
2
.
1
800 MHz to 2.7 GHz
P
d
3
.
2
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For transmitters rated at maximum output power not listed above, the recommended separation distance d in
meters (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: The compliance level between 80 MHz and 2.7 GHz is intended to decrease the likelihood that mobile/portable
communication equipment could cause interference if it is inadvertently brought into patient areas. For this reason, an
additional factor of 10/3 is used in calculating the recommended separation distance for transmitters in this frequency
range.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
