3231
ELECTROMAGNETIC COMPATIBILITY (EMC)
• Guidance and manufacturer’s declaration – electromagnetic emissions
The device is intended for use in the electromagnetic environments listed below, and should only be used in such
environments:
Emissions test Compliance Electromagnetic environment – guidance
RF emissions CISPR 11
Group 1
RF energy is used only to maintain device’s operation.
Therefore, its RF emissions are so low that it’s not likely to
cause any interference in nearby electronic equipment.
RF emissions CISPR 11
Class B
Harmonic emissions IEC
61000-3-2
Not
Applicable
The device is suitable for use in all establishments, including
domestic establishments, and those directly connected to
the public low-voltage power supply network that supplies
buildings used for domestic purposes.
Voltage fluctuations/ flicker
emissions IEC 61000-3-3
Not
Applicable
• 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
Electrostatic
discharge (ESD)
IEC 61000-4-2
± 6 kV contact
± 8 kV air
± 6 kV contact
± 15 kV air
The relative humidity should be at
least 5 %.
Power frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
3 A/m 30 A/m
Power frequency magnetic fields should
be at levels characteristic of a typical
location in a typical commercial or
hospital environment.
Recommended separation distance
I
r = --------- (m)
188
where I is the current in amperes in a
power bus or an appliance wire and r is
the recommended separation distance
between your device and the power bus
or appliance wire, in meters (m).
• Recommended separation distances between portable and mobile RF communication equipment and the device.
The device is intended for use in an electromagnetic environment where radiated RF disturbances are under control. User
can help prevent electromagnetic interference by keeping the device at a minimum distance from portable and mobile RF
communications equipment (transmitters). Below table details the maximum output power of transmitter:
Rated maximum
output power of
transmitter W
Separation distance according to frequency of transmitter m
150 kHz to 80 MHz
Not Applicable
80 MHz to 800 MHz
d = 1.2
800 MHz to 2.5 GHz
d = 2.3
0.01 NA 0.12 0.23
0.1 NA 0.38 0.73
1 NA 1.2 2.3
10 NA 3.8 7.3
100 NA 12 23
For transmitters rated at a maximum output power not listed above, the recommended separation dis-
tance d in metres (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 At 80 MHz and 800 MHz, the separation distance for 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.
• 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
Radiated
RF
IEC 61000-
4-3
3 Vrms
150 kHz to
80 MHz
3 V/m
80 MHz to
2.5 GHz
Not Ap-
plicable
10 V/m
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.
Recommended separation distance
d = 1.2 80 MHz to 800 MHz
d = 2 .3 800 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 compli-
ance 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 absorp-
tion 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
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 150 kHz to 80 MHz, field strengths should be less than 10 V/m.