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Guidance and manufacturer's declaration – electromagnetic immunity
0% U
T
(100% dip in U
for 0,5 cycle
0% U
T
Voltage dips, short
(100% dip in U
interruptions
and
for 1 cycle
voltage variations on
power supply input
70% U
T
lines
(30% dip in U
for 25 cycles
IEC 61000-4-11
0% U
T
(100% dip in U
for 5 s
Power
frequency
(50/60 Hz) magnetic
field
30 A/m
IEC 61000-4-8
NOTE
U
is the a.c. mains voltage prior to application of the test level
T
Guidance and manufacturer's declaration – electromagnetic immunity
The Therma is intended for use in the electromagnetic environment specified below. The customer or the user of the Therma should assure that is
used in such an environment
Immunity test
IEC60601
test level
Conducted RF
3 Veff
IEC61000-4-6
150 kHz to 80 MHz
Radiated RF
3 V/m
IEC61000-4-3
80 MHz to 2,7 GHz
Radiated RF
9 to 28 V/m
wireless com.
380 to 5800 MHz
IEC61000-4-3
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.
Field strength from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and
a
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 Therma is used exceeds
the applicable RF compliance level above, the Therma should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the Therma.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
MA489f_ES
0% U
T
)
(100% dip in U
)
T
T
for 0,5 cycle
0% U
T
)
(100% dip in U
)
T
T
for 1 cycle
Mains power quality should be that of a typical commercial or hospital environment.
If the user of Therma requires continued operation during power mains interruptions, it is recommended
70% U
that the Therma be powered from a uninterruptible power supply or a battery.
T
)
(30% dip in U
)
T
T
for 25 cycles
0% U
T
)
(100% dip in U
)
T
T
for 5 s
Power frequency magnetic fields should be at levels characteristic of a typical location in a typical com-
30 A/m
mercial or hospital environment
Compliance
level
Portable and mobile RF communications equipment should be used no closer to any part of the Therma,
including cables, than the recommended separation distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
3 V
d= 1,2√P
d= 1,2√P
from 80 MHz to 800 MHz
d= 2,3√P
from800 MHz to 2,5 7Hz
3 V/m
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,
than the compliance level in each frequency range.
Interference may occur in the vicinity of equipment marked with the following symbol:
9 to 28 V/m
Wireless Communications System must be maintained at a distance greater than 30 cm (12
inches) from each part of the Therma including cables.
Electromagnetic environment - guidance
b
ALL IV
should be less
a
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