Riester ri-vital Instrucciones De Uso página 83

Electromagnetic stability (immunity), portable RF devices
The distance between mobile communication devices and all parts of the device
including all cables should not fall below the distance calculated with the
corresponding equation for the frequency of the communication device.
Test
Emitted energy
Grid-bound
energy
The field strengths of stationary senders, such as base stations for cellular phones, of land mobile radio, amateur
radio, AM and FM radio transmissions and TV broadcasts cannot be predicted.
A site survey should be conducted for assessing the electromagnetic environment of stationary RF transmitter.
If the sender's measured field strength at the device's usage site exceeds the above-mentioned values, then the
device's function should be monitored.
If monitoring shows that the device is not functioning properly, corresponding measures must be taken. For
example, the device must be realigned or placed at a different location.
Recommended distances
The following minimum distances are recommended between the device and portable HF communication
equipment (e.g. mobile phones):
HF frequecy
Equation
Nominal power (W)
0.1
1
10
50
P is the nominal power of the transmitter in watts, d is the distance in metres
Example:
At a transmission frequency of 700 MHz and power of 10 watts, a distance of d = 1.2*root(10) = 3.79 m is
recommended.
ri-vital
ELECTROMAGNETIC STABILITY
IEC 60601-1-2 Class
3V/m 3V/m
3V/m 3V/m
3 VRMS 3 VRMS
26Mhz - 80MHz
d=1.2*square root (P)
Distance (m)
0.40
1.20
3.80
8.50
Distance
Distance =1.2*square root (power) for 80.. 800 MHz
Abstand = 2.3*square root (power) for 800 MHz to
2.5 GHz IEC 61000-4-3
square root (power) for 150kHz to 80MHz
IEC 61000-4-6
80MHz - 800 MHz
d=1.2*square root (P)
Distance (m)
0.40
1.20
3.80
8.50
800MHz - 2.5 GHz
d=2.3*
square root (P)
Distance (m)
0.80
1.20
7.30
16.30
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