Sirona Dental Systems GmbH
13 Electromagnetic compatibility
Operating Instructions PerioScan
61 29 626 D 3496
D 3496.201.02.05.02
39
båÖäáëÜ
Portable and mobile radio equipment
must not be used within the recom-
mended working clearance from the
UNIT
and its cables, which is calcu-
lated based on the equation suitable
for the relevant transmission fre-
quency.
Recommended working clearance:
Conducted HF inter-
ference
IEC 61000-4-6
3 V
eff
150
kHz to 80 MHz
a
3 V
eff
Radiated HF interfer-
ence
IEC 61000-4-3
3 V/m
80 MHz to 800 MHz
3 V/m
800 MHz to 2.5 GHz
3 V
eff
3 V
eff
where
P
is the nominal transmitter
output in watts (W) specified by the
transmitter manufacturer and
d
is the
recommended working clearance in
meters (m).
Field strengths from fixed RF trans-
mitters, as determined by an electro-
magnetic site survey
b
, should be less
than the compliance level
c
in each
frequency range.
Interference is possible in the vicinity
of equipment bearing the following
graphic symbol.
a
The higher frequency range applies at 80
MHz and 800
MHz.
b
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.
An investigation of the location is recommended to determine the electromagnetic environment resulting from station-
ary HF transmitters. If the measured field strength in the location in which the
UNIT
is used exceeds the applicable RF
compliance level above, the
UNIT
should be observed to verify normal operation. If unusual performance characteris-
tics are observed, it may be necessary to take additional measures such as reorientation or repositioning of the
UNIT
.
c
Over the frequency range 150
kHz to 80
MHz, field strengths should be less than 3
V/m.
Interference
immunity tests
IEC 60601-1-2 test level
Compliance level
Electromagnetic environment
guidelines
d 1.2
[
]
P
=
d 1.2
[
]
P
=
at 80 MHz to 800 MHz
d 2.3
[
]
P
=
at 800 MHz to 2.5 GHz
