Immunity against
Electrostatic discharge
(IEC 61000-4-2)
Fast transient electrical
disturbances/bursts (IEC
61000-4-4)
Impulse voltage/surges
(IEC 61000-4-5)
Voltage dips and short interruptions
of the supply voltage
(IEC 61000-4-11)
Magnetic field at the supply
frequency
(IEC 61000-4-8)
Emitted HF disturbance
(IEC 61000-4-3)
Conducted HF interference
(IEC 61000-4-6)
Recommended safety distances from portable and mobile HF communications equipment
Rated power of transmitter [W]
0.01
0.1
1
10
100
Test level and electromagnetic
environment to be maintained
Contact discharge: ± 8 kV
Air discharge: ± 15 kV
Power cable: ± 2 kV
Longer signal input lines/signal output
lines: ± 1 kV
Voltage:
External conductor against external
conductor: ± 1 kV
External conductor against ground
cable: ± 2 kV
30% to 100%, 10 ms to 5 s, various
phase angles
50 Hz and 60 Hz: 30 A/m
80 MHz to 2.7 GHz: 10 V/m
150 kHz to 80 MHz: 3 V
rms
ISM and amateur radio bands: 6 V
150 kHz – 800 MHz
d = 1.2 p
0.12 m (0.39 ft)
0.38 m (1.25 ft)
1.2 m (3.9 ft)
3.8 m (12.5 ft)
12m (39 ft)
Electromagnetic environment
Floors made of wood, concrete or ceramic tile. For a
synthetic floor covering, the relative humidity should
be at least 30%.
The quality of the supply voltage should correspond
to that of a typical business or hospital environment.
Devices with unusually strong line-frequency
magnetic fields (transformer stations, etc.) should not
be operated near the medical device.
Near equipment marked with the following symbol,
disturbances are possible:
rms
800 MHz – 2.5 GHz
d = 2.3 p
0.23 m (0.76 ft)
0.73 m (2.4 ft)
2.3 m (7.6 ft)
7.3 m (23.9 ft)
23 m (76 ft)
ENG
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