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EMC-declaration
Recommended separation distances between portable and mobile RF communications equipment and the Dental Chair
The Dental Chair is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the Dental
Chair can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmit-
ters) and the Dental Chair as recommended below, according to the maximum output power of the communications equipment.
Rated maximum
Separation distance according to frequency of transmitter
output power of
l in m
transmitter
150 KHz to 80 MHz
P in W
0,01
0,1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (m) can be estimated using the equation
applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
REMARK 1:
At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
REMARK 2:
These guidance may not applicable in all situations.
Electromagnetic propagation is affected by absorption and reflection from structures, objects and people.
Immunity tests
Conducted RF
according IEC 61000-4-6
Radiated RF
according IEC 61000-4-3
REMARK 1 At 80 MHz and 800 MHz, the higher frequency range applies.
REMARK 2 These guidance may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and
people.
a 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. To assess the electromagnetic environment due to fixed RF transmitters, an elec-
tromagnetic site survey should be considered. If the measured field strength in the location in which the dental chair is used exceeds the applicable RF comp-
liance level above, the dental chair should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary,
such as reorienting or relocating the dental chair.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Anhang
54
Appendix
80 MHz to 800 MHz
d=1.2 ·
d=1.2 ·
0.12
0.12
0.38
0.38
1.20
1.20
3.80
3.80
12.00
12.00
IEC 60601-test level
Compliance level
3 Vrms
3 Vrms
150 kHz to 80 MHz
3 V/m
3 V/m
80 MHz to 2.5 GHz
800 MHz to 2.5 GHz
d=2.3 ·
0.23
0.73
2.30
7.30
23.00
Electromagnetic environment - guidance
Portable and mobile RF communications equipment
should be used no closer to any part of the Dental Chair,
including cables, than the recommended separation
distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
d=1.2 ·
d=1.2 ·
80 MHz to 800 MHz
d=2.3 ·
800 MHz to 2.5 GHz
where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and d is the recommended separation
distance in metres (m).
Field strengths from fixed RF transmitters, as determined
by an electromagnetic site survey,
the compliance level in each frequency range.
Interference may occur in the vicinity of equipment
marked with the following symbol:
Ultimate Comfort
should be less than
a
b
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