ResMed Astral Series Clinical Manual page 158

Immunity test IEC60601-1-2 test
level, Ed. 4
Radiated RF 10 V/m
IEC 61000-4-3 80 MHz to 2.5 GHz
for Home
environment
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 device is used exceeds the applicable RF compliance level above, the device should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the device.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 10 V/m.
Notes:
•
Ut is the AC mains voltage prior to application of the test level.
•
At 80 MHz and 800 MHz, the higher frequency range applies.
•
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
•
ISM bands: 6.765 to 6.795MHz, 13.533 to 13.567MHz, 26.957 to 27.283MHz and 40.66 to 40.70Mz
Guidance and Manufacturer's Declaration Electromagnetic Emissions & Immunity
Compliance level
10 V/m
80 MHz to 2.5 GHz
Electromagnetic environment—guidance
Recommended separation distance for life
support equipment
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 meters (m). Field strengths
from fixed RF transmitters, as determined by an
electromagnetic site survey,
compliance level in each frequency range.
Interference may occur in the vicinity of equipment
marked with the following symbol:
should be less than the
a
b
English 151