Sirona Dental Systems GmbH 3 Electromagnetic compatibility
Installation Requirements C3
+
, C4
+
, C4
+
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60 27 945 D3382
D3382.021.02.12.02
35
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Portable and mobile radio equipment must
not be used within the recommended work-
ing clearance from the UNIT and its cables,
which is calculated based on the equation
suitable for the relevant transmission fre-
quency.
Recommended working clearance:
Conducted HF inter-
ference
IEC 61000-4-6
3V
eff
150 kHz to 80 MHz
a
3V
eff
Radiated HF interfer-
ence
IEC 61000-4-3
3V/m
80MHz to 800MHz
a
3V/m
800MHz to 2.5GHz
a
3V
eff
3V
eff
where P is the nominal transmitter output in
watts (W) specified by the transmitter manu-
facturer and d is the recommended working
clearance in meters (m).
The field strength of stationary radio trans-
mitters is based on a local investigation for
all frequencies
b
less than the conformance
level for all frequencies
c
.
Interference is possible in the vicinity of
equipment bearing the following graphic
symbol.
a. The higher frequency range applies at 80MHz and 800MHz.
b. The field strength of stationary transmitters such as the base stations of radio telephones and land mobile services,
amateur radio stations as well as AM and FM radio and television broadcasting stations cannot be accurately predeter-
mined. An investigation of the location is recommended to determine the electromagnetic environment resulting from
stationary HF transmitters. If the field strength measured at the UNIT location exceeds the conformance level specified
above, the UNIT must be observed with respect to its normal operation at each application site. If unusual performance
characteristics are observed, it may be necessary to take additional measures such as reorientation or repositioning of
the UNIT.
c. A frequency range of 150kHz to 80MHz results in a field strength of less than 3V/m.
Immunity interfer-
ence tests
IEC 60601-1-2 test
level
Conformance level Electromagnetic environment guidelines
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