18
MWA-M / MWA-PM-BA-e-1614
8.3.1 Crucial features of performance
Note:
The multifunctional balances MWA do not have any crucial features of
performance as per IEC 60601-1. The system may be subject to
interference by other devices even if these devices conform to current
emission requirements as per CISPR.
8.4 Minimum distances
Recommended safety distance between portable and mobile HF
telecommunication devices and multi-function balances MWA
The multi-function balances MWA are designed for use in an electromagnetic environment in
which HF disturbance variables are controlled. The customer or user of the multi-function
balances MWA can help avoiding electromagnetic disturbances by keeping the minimum
distance between portable and mobile HF telecommunication devices (transmitters) and the
multi-function balances MWA – depending on the output performance of the communication
device, as stated below.
Rated capacity of
transmitter
W
The safety distance depends on the transmission
frequency
m
150 kHz up to 80
MHz
80 MHz up to 800
MHz
800 MHz up to 2.5
GHz
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.20
1.20
2.30
10
3.80
3.80
7.30
100
12.00
12.00
23.00
For transmitters with a maximum rated capacity not stated in the table above you can
calculate the recommended safety distance in metres (m) yourself by using the equation
belonging to each column, whereby P equals the maximum rated capacity of the transmitter
in Watt (W) as per details provided by the transmitter manufacturer.
NOTE 1 Higher frequency range applies to 80 MHz and 800 MHz.
NOTE 2
These guidelines may not be applicable in all cases.
The spread of electromagnetic variables is influenced by absorption and
reflections in buildings, objects and humans.
