Interacoustics AT235 Mode D'emploi page 58

AT235 Instructions for Use - EN
Power frequency (50/60
Hz)
IEC 61000-4-8
Note: UT is the A.C. mains voltage prior to application of the test level.
Guidance and manufacturer's declaration — electromagnetic immunity
The AT235 is intended for use in the electromagnetic environment specified below. The customer or the user of the AT235 should
assure that it is used in such an environment,
Immunity test
Conducted RF
IEC / EN 61000-4-6
Radiated RF
IEC / EN 61000-4-3
NOTE1 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 AT235 is used exceeds the applicable RF compliance level above, the AT235 should be observed to verify normal
operation, If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the AT235.
(b)
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
(30% dip in UT) for 25 cycles
<5% UT
(>95% dip in UT) for 5 sec
3 A/m
IEC / EN 60601
test level
3 Vrms
150kHz to 80 MHz
3 V/m
80 MHz to 2,5 GHz
25 cycles
<5% UT
3 A/m
Compliance level
3 Vrms
3 V/m
Page 54
powered from an uninterruptable power
supply or its battery.
Power frequency magnetic fields should
be at levels characteristic of a typical
location in a typical commercial or
residential environment.
Electromagnetic environment – guidance
Portable and mobile RF communications
equipment should be used no closer to
any parts of the AT235, including cables,
than the recommended separation
distance calculated from the equation
applicable to the frequency of the
transmitter.
Recommended separation distance
=
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 meters (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: