Stiegelmeyer Deka - Page 108

Appendix
EMC Info Tables
108
Instruction Manual
Interference
Immunity Tests
IEC 60601
Test Level
Compliance
Level
Electromagnetic Environment -
Guidelines
Portable and mobile radio devices
should not be used in closer proximity to
the BED, including the cables, than the
recommended protection distance calcu-
lated using the equation for the appro-
priate transmission frequency.
Recommended protection distance:
Radiated HF in-
terference accord-
ing to IEC 61000-
4-6
3 V
eff
150 kHz to
80 MHz
3 V
eff
150 kHz to
80 MHz
d = 1.2 √P
Radiated HF in-
terference accord-
ing to IEC 61000-
4-3
3 V/m
80 MHz to
2500 MHz
3 V/m
80 MHz to
2500 MHz
d = 1.2 √P
for 80 MHz to
800 MHz
d = 2.3 √P f
for 800 MHz
to 2.5 GHz
with P as the maximum rated power of the
transmitter in watts (W) according to the
manufacturer of the transmitter and d as
the recommended protection distance in
metres (m).
According to an in-situ test
a
, the field
strength of stationary radio transmitters
should be lower, for all frequencies, than
the compliance level.
b
Interference is possible when in the vicini-
ty of equipment bearing the following sign.
Note 1:
The higher frequency range applies for 80 MHz and 800 MHz.
Note 2:
These guidelines may not be applicable in all circumstances. The propaga-
tion of electromagnetic interference is affected by buildings, objects and
people due to absorption and reflection.
a
The field strength of stationary transmitters, such as base stations for cord-
less telephones and for public mobile radio devices, amateur radio stations,
and AM and FM radio and television transmitters cannot be predicted exact-
ly by theoretical means. In order to determine the electromagnetic environ-
ment with regard to the transmitter, a study of the location should be con-
sidered. If the field strength measured at the location where the BED is to
be used exceeds the upper compliance limit, the BED should be observed
to check that it functions properly. Should any unusual performance charac-
teristics be observed, additional measures could be necessary, such as
turning the bed or moving it to a different location.
b
Across the frequency range of 150 kHz to 80 MHz, the field strength should
be less than 3 V/m.