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EMC Information
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Immunity Test
IEC 60601 Test
Level Compliance Level Guidance: Electromagnetic Environment
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:
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz
outside ISM bands
1
3 V d = 1.2 √P
10 Vrms
150 kHz to 80 MHz in
ISM bands
a
10 V d = 1.2 √P
Radiated RF
IEC 61000-4-3
10 V/m
80 MHz to 2.5 GHz
20 V/m
80 MHz to 2.5 GHz
d = 0.6 √P 80 MHz to 800 MHz
d = 1.2 √P 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 meters (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.
2
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 reection
from structures, objects, and people.
1 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 re-orienting or relocating
the device.
2 Over the frequency range 150 kHz to 80 MHz, the eld strengths should be less than 3 V/m.