Working Clearances - Sirona SIROInspect Operating Instructions Manual

Sirona Dental Systems GmbH
Operating Instructions SIROInspect
Interference immunity
tests
Conducted RF
interference
IEC 61000-4-6
Radiated RF interference
IEC 61000-4-3
Recommended working clearances
between portable and mobile RF
communication devices and the UNIT
63 82 936 D3584
D3584.201.01.03.02 02.2013
IEC 60601-1-2 test Conformance level
level
3 V 3 V
eff
1
150 kHz to 80 MHz
3 V/m 3 V
1
80 MHz to 800 MHz
3 V
3 V/m
1
800 MHz to 2.5 GHz
1. The higher frequency range applies at 80 MHz and 800 MHz.
2. Field strength from fixed transmitters, such as base stations for radio
(cellular/cordless) telephones and land mobile services, amateur
radio stations, and AM and FM radio and TV stations, cannot be
predicted beforehand with accuracy. An investigation of the location
is recommended to determine the electromagnetic environment
resulting from stationary HF 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 a reorientation or repositioning of the UNIT.
3. Over the frequency range of 150 kHz to 80 MHz, the field strength is
less than 3 V/m.
6.3

Working clearances

Working clearances
The UNIT is intended for operation in an electromagnetic environment,
where radiated RF interference is checked. The customer or the user of
the UNIT can help prevent electromagnetic interference by duly
observing the minimum distances between portable and mobile HF
communication devices (transmitters) and the UNIT. These values may
vary according to the maximum output power of the communication
device as specified below.
Electromagnetic environment –
guidance
d= [1.2] √P
eff
d= [1.2] √P
eff
at 80 MHz to 800 MHz
d= [2.3] √P
eff
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).
According to an electromagnetic on-
site survey,
radio transmitters is less than the
compliance level in each frequency
range.
Interference is possible in the vicinity
of equipment bearing the following
symbol.
6 Electromagnetic compatibility
6.3 Working clearances
²
the field strength of fixed
³
19