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English
U-2S2303-30121-G V1.0 Cari Chair
OPERATION MANUAL
Resistance Test
Test Level as per
IEC 60601
Level of Compliance
Electromagnetic
Environment
Power frequency(50, 60
Hz) magnetic field IEC
61000-4-8
3 A/m
3 A/m
SR321 power frequency
m a g n e t i c f i e l d s
should be at levels
c h a r a c t e r i s t i c o f a
typical location in a
typical commercial or
hospital environment.
NOTE:
UT is the a.c. mains voltage prior to application of the test level.
Resistance Test
Test Level as per
IEC 60601
Level of
Compliance
Electromagnetic Environment
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80
MHz
3 Vrms
Portable and mobile RF communications
equipment should be used no closer to any
part of SR321 including cables, than the
recommended separation distance calculated
from the equation applicable to the frequency
of the transmitter.
Recommended distances:
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 mattress
(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:
Radiated high-
frequency
phenomena
IEC 61000-4-3
3 V/m
80 MHz to 2.5
GHz
3 V/m
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 SR321 is used exceeds the applicable
RF compliance level above, SR321 should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating SR321
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
NOTE
At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE
These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.