ResMed S8 Elite II User Manual page 42

Guidance and manufacturer's declaration—electromagnetic immunity
The S8 series of devices is intended for use in the electromagnetic environment specified below. The
customer or the user of the S8 device should assure that the device is used in such an environment.
Immunity IEC60601-1-2
test test level
Conducted RF 3 Vrms
IEC 61000-4-6 150 kHz to 80 MHz
Radiated RF 10 V/m
IEC 61000-4-3 80 MHz to 2.5 GHz
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 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
S8 device is used exceeds the applicable RF compliance level above, the S8 device should be observed to
verify normal operation. If abnormal performance is observed, additional measures may be necessary, such
as reorienting or relocating the S8 device.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 10 V/m.
Compliance Electromagnetic environment—
level guidance
Portable and mobile RF communications
equipment should be used no closer to any
part of the S8 device, including cables, than
the recommended separation distance
calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
3 Vrms d = 1.17 P
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,
level in each frequency range.
Interference may occur in the vicinity of
equipment marked with the following symbol:
a
should be less than the compliance
b
System Specifications 36