Widex BEYOND B-F2 RIC User Instructions page 39

Immunity Test
a. Field strengths from fixed transmitters, such as base stations
for radio (cellular/cordless) telephones and land mobile radios, amateur ra-
dio, AM and FM radio broadcast and TV broadcast cannot be predicted the-
oretically 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 BEYOND™ series
hearing aid is used exceeds the applicable RF compliance level above, the
BEYOND™ series hearing aid should be observed to verify normal opera-
tion. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or re-locating the BEYOND™ series hearing
aid.
b. Over the frequency range 150 kHz to 80 MHz, field strengths should be
less than 3 V/m.
Recommended separation distances
Recommended separation distances between portable and mobile RF com-
munication equipment and the BEYOND™ series hearing aids.
The BEYOND™ series hearing aids are intended for use in the electromag-
netic environment in which RF disturbances are controlled. The customer or
the user of the BEYOND™ series hearing aid can help prevent electromag-
netic interference by maintaining a minimum distance between portable
IEC 60601
Test level
Compliance level Electromagnetic
39
environment –
guidance