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ENGLISH
SYSTEM SPECIFICATIONS
Guidance and manufacturer’s declaration – electromagnetic immunity
The ResMed S7 Lightweight is intended for use in the electromagnetic environment specified below. The
customer or the user of the ResMed S7 Lightweight should assure that it is used in such an environment.
Immunity test
IEC60601-1-2
test level
Compliance
level
Electromagnetic environment – guidance
Portable and mobile RF communications
equipment should be used no closer to any part
of the ResMed S7 Lightweight, 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
3 Vrms d = 1.17 √P
Radiated RF
IEC 61000-4-3
10 V/m
80 MHz to 2.5 GHz
10 V/m d = 0.35 √P 80 MHz to 800 MHz
d = 0.70 √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 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 ResMed S7 Lightweight is
used exceeds the applicable RF compliance level above, the ResMed S7 Lightweight should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the ResMed S7 Lightweight.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 10 V/m.
308133r1.book Page 27 Thursday, March 27, 2003 3:17 PM