Preventing Electromagnetic Interferences - Schiller CARDIOVIT AT-1 G2 User Manual

11 Trouble Shooting

11.2 Preventing electromagnetic interferences

"Non ionising electromagnetic radiation"
HF source
Wireless communications devices
Various radio services (TETRA 400)
- Walkie-talkies (FRS)
- Rescue service, police, fire brigade, servicing (GMRS)
LTE band 13/17
- GSM800/900
- LTE band 5
- Radio telephone (microcellular) CT1+, CT2, CT3
- GSM1800/1900
- DECT (radio telephone)
- LTE Band 1/3/4/25
- UMTS
- Bluetooth, WLAN 802.11b/g/n
- LTE Band 7
- RFID 2450 (active and passive transponders and
reading devices)
WLAN 802.11a/n
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11.2 Preventing electromagnetic interferences
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.
 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).
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
For more information on operation in an electromagnetic environment according to
IEC/EN 60601-1-2, please consult the service manual.
Transmitter fre- Testing fre-
quency quency
[MHz] [MHz]
385
380-390
430-470 450
704-707 710/745/780
800-960 810/870/930
1720/1845/
1700-1990
1970
2400-2570 2450
5240/5500/
5100-5800
5785
CARDIOVIT AT-1 G2
Max.
Distance d
power P
[m]
[W]
1.8 0.3
2 0.3
0.2 0.3
2 0.3
2 0.3
2 0.3
0.2 0.3

d = 0.6 P
.