ResMed S8 Compact System Manual De Instrucciones página 31

338249r1.book Page 26 Friday, June 10, 2005 3:22 PM
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 test
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
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 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.
26
IEC60601-1-2 Compliance
test level level
3 Vrms 3 Vrms
150 kHz to 80 MHz
10 V/m 10 V/m
80 MHz to 2.5 GHz
Electromagnetic environment—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
d = 1.17 √P
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,
should be less than the compliance level in each
b
frequency range.
Interference may occur in the vicinity of
equipment marked with the following symbol:
a