2 – 14 HS40 Service Manual
Immunity
Te st
IEC 60601 Test
Level
Compliance
Level
Electromagnetic Environment –
Guidance
Conducted
RF
IEC 61000-4-
6
3 Vrms
150 kHz to
80MHz
3V Portable and mobile RF communications
equipment should not be used 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 to 800MHz
800MHz to 2.5GHz
Radiated RF
IEC 61000-4-
3
3 V/m
80 MHz to
2.5GHz
3V/m Where P is the transmitter’s maximum
output power rating in watts (W) according
to the transmitter’s manufacturer, and d is
the recommended separation distance in
meters (m).
Field strengths from fixed 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.
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 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 effectiveness and filter attenuation.
b
Over the frequency range 150kHz to 80MHz, field strengths should be less than 3V/m.
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