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Chapter 1 Safety
Immunity test
IEC 60601
test level
Compliance
level
Electromagnetic environment - guidance
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz
to 80 MHz
3 V Portable and mobile RF communications equipment
should be used no closer to any part of the Ultrasound
System, including cables, than the recommended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
80MHz a 800MHz
800MHz a 2.5GHz
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz
to 2.5 GHz
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 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 aected by
absorption and reection 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 Ultrasound System is used exceeds the applicable RF compliance level above, the Ultrasound
System should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the Ultrasound System, or using a
shielded location with a higher RF shielding eectiveness and lter attenuation.
b
Over the frequency range 150kHz to 80MHz, eld strengths should be less than 3V/m.
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