Cardiac Science Atria 3100, Руководство по эксплуатации

Страница: 124 / 136

11 Maintenance and Service
11-12 Atria Electrocardiograph Operating Instructions 70-00082-01 A
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
3 V
c
3 V/m
c
Portable and mobile RF communications
equipment should be used no closer to any
part of the Atria, including cables, than the
recommended separation distance
calculated from the equation applicable to
the frequency of the transmitter.
Recommended separation distance
d
= 1.2
√ P
d
= 1.2
√ P
80 MHz to 800 MHz
d
= 2.3
√ 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 metres (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 80 MHz 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 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 Atria is used exceeds the applicable RF compliance level
above, then the Atria should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as reorienting or relocating the Atria.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
c
Amplitude modulated at 80% with a modulation frequency of 10 KHz per EN 60601-2-25.