Beurer IH 21 Mode D'emploi page 71

Guidance and manufacturer's declaration – electromagnetic immunity
The IH21 is intended for use in the electromagnetic environment specified below. The customer or the user
of the IH21should assure that it is used in such an environment.
Immunity test IEC 60601
test level
Conducted RF 3 V
rms
IEC 61000-4-6 150 kHz to
80 MHz
Radiated RF 3 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 IH21 is used exceeds the applicable RF compliance level above, the IH21 should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the IH21.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Compliance Electromagnetic environment – guidance
level
3 V Portable and mobile RF communications equipment
rms
should be used no closer to any part of the IH21, inclu-
ding cables, than the recommended separation distance
calculated from the equation applicable to the frequency
of the transmitter.
Recommended separation distance
d = 1.2 P
3 V/m
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 trans-
mitter in watts (W) according to the transmitter manufac-
turer and d is the recommended separation distance in
metres (m).
Field strengths from fixed RF transmitters, as determined
by an electromagnetic site survey,
the compliance level in each frequency range.
Interference may occur in the vicinity of
equipment marked with the following symbol:
71
a should be less than
b