INSTRUCTIONS FOR USE DA 270, DA 370, DA 280, DA 380
UM_EN_DA270_DA280_DA370_DA380_m2015_2019-04_ver1.9 66 / 67
17.4 Recommended separation distances between portable and mobile RF communications
equipment and the dental unit
The dental unit is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the dental unit can help prevent electromagnetic interference by maintaining minimum distances
between portable and mobile RF communications equipment and the dental unit according to Table 17.4.
Table 17.4
Rated maximum output
power of transmitter
P[W]
Separation distance according to frequency of transmitter
d[m]
150 kHz to 80 MHz
𝑑 = 1,167 √𝑃
80 MHz to 800 MHz
𝑑 = 1,167 √𝑃
800 MHz to 2,5 GHz
𝑑 = 2,333 √𝑃
0,01
0,117
0,117
0,233
0,1
0,369
0,369
0,738
1
1,167
1,167
2,333
10
3,69
3,69
7,377
100
11,67
11,67
23,33
P[W]- rated maximum output power
d[m]
– recommended separation distance
For transmitters rated at a maximum output power not listed above, the distance is calculated using the equation applicable
to the respective frequency.
For frequency of 80 MHz the frequency range of 80 MHz to 800 MHz applies
and for the frequency of 800 MHz the frequency range of 800 MHz to 2,5 GHz applies
These guidelines may not apply in all situations.
Electromagnetic propagation is affected by absorption and reflection from structures, objects and people
