61 77 476 D 3495
D 3495
.
201.01.02
.
02
08.2007
51
Sirona Dental Systems GmbH
12
Electromagnetic compatibility
Operating Instructions and Installation
XIOS USB
Interference immunity
1.
The higher frequency range applies at 80 MHz and 800 MHz.
2.
Field strengths from fixed transmitters, such as base stations for radio
(cellular/cordless) telephones and land mobile radios, amateur radio, AM/
FM radio and TV broadcasts, cannot be predicted theoretically with
accuracy. An investigation of the location is recommended to determine
the electromagnetic environment resulting from stationary RF
transmitters. If the measured field strength in the location in which the
UNIT
is used exceeds the applicable RF compliance level specified
above, the
UNIT
should be observed to verify normal operation. If unusual
performance characteristics are observed, it may be necessary to take
additional measures such as reorientation or repositioning of the
UNIT
.
3.
Over the frequency range 150kHz to 80MHz, field strengths should be
less than 3V/m.
Portable and mobile radio equipment
must not be used within the
recommended working clearance from
the
UNIT
and its cables, which is
calculated based on the equation
suitable for the relevant transmission
frequency.
Recommended working clearance:
Conducted RF
interference
IEC 61000-4-6
3 V
eff
150 kHz to 80 MHz
1
3 V
eff
d= [1.2]
√
P
Radiated RF
interference
IEC 61000-4-3
3 V/m
80MHz to 800 MHz
3 V/m
800 MHz to 2.5 MHz
3 V
eff
3 V
eff
d= [1.2]
√
P
at 80MHz to 800 MHz
d= [2.3]
√
P
at 800 MHz to 2.5 MHz
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
transmitters, as determined by an
electromagnetic site survey
2
should be
less than the compliance level
3
in each
frequency range.
Interference is possible in the vicinity of
equipment bearing the following graphic
symbol.
Interference
immunity tests
IEC 60601-1-2 test level Compliance level
Electromagnetic environment –
guidelines
