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Guidance and manufacturer’s declaration – electromagnetic immunity
The Avant Hearing Instrument Test Box is intended for use in electromagnetic environment specific below. The customer or the user of the Avant Hearing Instrument
Test Box should assure that it is used in such an environment.
Immunity test
IEC 60601- test level
Compliance level
Electromagnetic environment - guidance
Portable and mobile RF communications equipment should be used no closer to any part of the
Avant Hearing Instrument Test Box, including cables, than the recommended separation distance
calculated from the equation applicable to the frequency of the transmitter. Recommended
separation distance:
Conducted RF
IEC 61000-4-6
0.15 - 80 MHz
3 Vrms & 6Vrms in
ISM Band 1 kHz
AC Mains
0.15 - 80 MHz
3 Vrms & 6Vrms in
ISM Band 1 kHz
AC Mains
d = 1,17
P
×
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2,5 GHz
3 V/m
d = 1,17
P
×
80 to 800 MHz
d = 2,33
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:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency ranges 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, 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 Avant REM is used exceeds the applicable RF
compliance level above, the Avant REM should be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the Avant REM.
b.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
