MHW 0010 – DK 1696 | Version 001 – 21/09/2017 | custo med GmbH
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[2] Cardiac Rehabilitation hardware, custo guard (custo cardio concept) |
page 20
Cardiac Rehabilitation
Hardware, description of device for custo guard (custo cardio concept)
Recommended protective distances between portable
and mobile RF telecommunication devices and custo guard
The custo guard ECG transmitter is designed for operation in an electromagnetic environment in which the RF
transients are controlled. The user of custo guard can help avoid electromagnetic disturbances by maintaining
the minimum distance between portable and mobile RF telecommunication devices (transmitters) and the device
– depending on the initial performance of the communication device, as indicated below.
For transmitters whose maximum nominal power is not indicated in the above table, the recommended protec-
tive 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 ab-
sorptions 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/U
1
] √P
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
80 MHz to 800 MHz
d= [3.5/E
1
] √P
0.04
0.11
0.35
1.11
3.50
800 MHz to 2.5 GHz
d= [7/E
1
] √P
0.08
0.22
0.70
2.22
7.00
