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Guidance & Declaration — electromagnetic immunity
The TL90 is intended for use in the electromagnetic environment specified below. The customer or
the user of the TL90 should ensure that it is used in such an environment.
Immunity test IEC 60601
test level
Compliance
level
Electromagnetic environment –
guidance
Radiated RF
IEC61000-4-3
3 V/m
80MHzto2,5GHz
3 V/m
Portable and mobile RF communications
equipment should be used no closer to any
part of the TL90, including cables, than the
recommended separation distance calcu-
lated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
3V
d=1.2 P
1/2
80MHzto800MHz
d=2.3 P
1/2
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
metres(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800MHz,thehigherfrequencyrangeapplies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorpti-
on 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 electromagne-
tic site survey should be considered. If the measured field strength in the location in which the TL90 is used
exceeds the applicable RF compliance level above, the Medical Daylight should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting
or relocating the TL90.
b
Overthefrequencyrange150kHzto80MHz,fieldstrengthsshouldbelessthan[V1]V/m.
65


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