2
Holter ABPM
Hardware, description of device for custo screen 400
MHW 0004 – DK 1663 | Version 001 – 12/01/2018 | custo med GmbH
[2] Holter ABPM Hardware, custo screen 400 |
page 27
Recommended protective distances between portable
and mobile RF telecommunication devices and custo screen 400
custo screen 400 is designed for operation in an electromagnetic environment in which the RF transients are
controlled. The user can help avoid electromagnetic interference by maintaining the minimum distance between
portable and mobile RF telecommunication devices (transmitters) and the device – depending on the power
output of the communication device, as indicated below.
For transmitters whose maximum nominal power is not indicated in the above table, the recommended
protective distance d can be determined in meters (m), using the equation affiliated with the corresponding
column. P is the maximum nominal power of the transmitter in watt (W) according to the indications of the
manufacturer of the transmitter.
COMMENT 1:
With 80 MHz and 800 MHz the higher frequency range is valid.
COMMENT 2:
These guidelines may not apply in every case. The propagation of electromagnetic variables is influenced by
absorptions and reflections of buildings, objects and people.
Protective distance depending on the transmitting frequency in m
Nominal power of the transmitter
W
0.01
0.1
1
10
100
150 kHz to 80 MHz
d= (3.5/U1) √P
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
80 MHz to 800 MHz
d= (3.5/E
1
) √P
0.12
0.38
1.20
3.79
12.00
800 MHz to 2.5 GHz
d= (7/E
1
) √P
0.23
0.73
2.30
7.27
23.00
