Seca CT8000P-2 - Preventing Electromagnetic Interferences

Page 105
Art. no.: 2.511407 Rev.: a
Trouble Shooting 13
User guide Preventing electromagnetic interferences 13.2
CT8000P-2
13.2 Preventing electromagnetic interferences
For permanent HF telecommunication devices (e.g. radio and TV), the recommended
distance can be calculated using the following formula: for 150 kHz to
800 MHz and for 800 MHz to 2.5 GHz
d = recommended minimum distance in meters
P = transmitting power in Watts
“Non ionising electromagnetic radiation"
The user can help avoid electromagnetic disturbances by keeping the minimum
distance between portable and mobile HF telecommunication devices (transmitters)
and the CT8000P-2. The distance of 0.3 m depends on the output performance/
frequency of the communication device as indicated below.
HF source
Wireless communications devices
Transmitter fre-
quency
[MHz]
Testing fre-
quency
[MHz]
Max.
power P
[W]
Distance d
[m]
Various radio services (TETRA 400) 380-390 385 1.8 0.3
- Walkie-talkies (FRS)
- Rescue service, police, fire brigade, servicing (GMRS)
430-470 450 2 0.3
LTE band 13/17 704-787 710/745/780 0.2 0.3
- GSM800/900
- LTE band 5
- Radio telephone (microcellular) CT1+, CT2, CT3
800-960 810/870/930 2 0.3
- GSM1800/1900
- DECT (radio telephone)
- LTE Band 1/3/4/25
- UMTS
1700-1990
1720/1845/
1970
20.3
- Bluetooth, WLAN 802.11b/g/n
- LTE Band 7
- RFID 2450 (active and passive transponders and
reading devices)
2400-2570 2450 2 0.3
WLAN 802.11a/n 5100-5800
5240/5500/
5785
0.2 0.3
 Portable HF telecommunication devices must not be used within a radius of
0.3 m from the CT8000P-2 and its cables.
 Do not place the CT8000P-2 on top of other electric/electronic devices - i.e.
maintain a sufficient distance to other devices (this includes the patient cables).
d1.2 P=
d2.3 P=
For more information on operation in an electromagnetic environment according to
IEC/EN 60601-1-2, please consult the service manual.