11
Trouble Shooting
11.2 Preventing electromagnetic interferences
Page 54
CARDIOVIT AT-1 G2
A
rt.
no.
: 2.
511
235 Rev.:
d
11.2 Preventing electromagnetic interferences
For permanent HF telecommunication devices (e.g. radio and TV), , the
recommended distance can be calculated using the following formula:
.
(The formula is based on the max. immunity level of 10 V/m in the frequency domain
of 80 MHz to 3000 MHz).
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
CARDIOVIT AT-1 G2
. The distance depends on the output performance 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
704-707
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
2
0.3
- 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
CARDIOVIT AT-1 G2
and its cables.
Do not place the
CARDIOVIT AT-1 G2
on top of other electric/electronic devices
- i.e. maintain a sufficient distance to other devices (this includes the patient
cables).
d
0.6
P
=
For more information on operation in an electromagnetic environment according to
IEC/EN 60601-1-2, please consult the service manual.