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Guidance and manufacturer’s declaration – electromagnetic immunity
The device is intended for use in the electromagnetic environments listed below, and should only be
used in such environments:
Immunity
test
IEC 60601 test
level
Compliance level
Electromagnetic environment
-guidance
Conducted RF
IEC 61000-4-6
3V rms
At 0.15-80MHz
6V rms
At ISM & Radio
Amateur Freq
3V rms
At 0.15-80MHz
6V rms
At ISM & Radio
Amateur Freq.
Portable and mobile RF communications
equipment should be used no 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.
Radiated RF
IEC 61000-4-3
Proximity
elds from RF
wireless
communications
equipment
IEC 61000-4-3
10 V/m at
80 - 2700MHz AM
Modulation And
9 - 28V/m at
385 - 6000MHz,
Pulse Mode and
other Modulation.
The system shall be
tested as specied in
IEC60601-1-2
Table 9
for proximity elds
from RF wireless
communications
equipment using
the test methods
specied in IEC
61000-4-3
10 V/m at
80 - 2700 MHz AM
Modulation And
9 - 28V/m at
385 - 6000MHz,
Pulse Mode and
other Modulation.
The system shall be
tested as specied in
IEC60601-1-2
Table 9
for proximity elds
from RF wireless
communications
equipment using
the test methods
specied in IEC
61000-4-3
Recommended separation distance
Considering to reduce the minimum
separation distance, based on RISK
MANAGEMENT, and using higher
IMMUNITY TEST LEVELS that are
appropriate for the reduced minimum
separation distance. Minimum
separation distances for higher
IMMUNITY TEST LEVELS shall be
calculated using the following equation:
E=6/d
where P is the maximum power in W,
d is the minimum separation distance
in m, and E is the IMMUNITY TEST
LEVELS in V/m. Field strengths from xed
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 80MHz and 800MHz, 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 xed 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 xed RF
transmitters, an electromagnetic site survey should be considered. If the measured eld strength in
the location in which the device is used exceeds the applicable RF compliance level above, the device
should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the device.
b
Over the frequency range 150kHz to 80MHz, field strengths should be less than 3V/m.
P
Test specications for enclosure port immunity to RF wireless communications equipment.
Test frequency (MHz)
Modulation
IMMUNITY TEST LEVEL (V/m)
385
Pulse modulation 18Hz
a)
27
450
FM ±5kHz deviation 1kHz sine
b)
28
710
745
780
Pulse modulation 217Hz
a)
9
810
870
930
Pulse modulation 18Hz
a)
28
1720
1845
1970
Pulse modulation 217Hz
a)
28
2450
Pulse modulation 217Hz
a)
28
5240
5500
5785
Pulse modulation 217Hz
a)
9
NOTE:
If necessary to achieve the IMMUNITY TEST LEVEL, the distance between the transmitting antenna and
the ME EQUIPMENT or ME SYSTEM may be reduced to 1m, The 1m test distance is permitted by IEC
61000-4-3.
a)
The carrier shall be modulated using a 50% duty cycle square wave signal.
b)
AS an alternative to FM modulation, 50% pulse modulation at 18Hz may be used because while it
does not represent actual modulation, it would be worst case.
