Schulte Elektronik siss babycontrol, Инструкция пользователя

Страница: 31 / 36

Technical description
31
Note 1: At 80 and 800 MHz the higher frequency range is applicable.
Note 2: This guide may not be applicable in all cases. The electromagnetic propagation
depends on the absorption and reflection of buildings, objects and persons.
Because it is not possible to predetermine exactly the field strength of stationary transmitters,
like e.g. basis stations of wireless telephones and land mobile service, amateur wireless
station, AM and FM broadcast and TV broadcast, the electromagnetic environment of the
location of the stationary transmitters should be considered and investigated. If the measured
field strength at the location, where BC / BCp is used, does not keep the compliance level
above, the BC / BCp should be observed to prove the function according its designation. If
unusual performance criteria are noticed, additional measures could have to be taken, like
e.g. changing the adjustment or the standing place of the BC SPO2 / ECG.
In the frequency range from 150 kHz to 80 MHz the field strength should be less than 1,5
V/m .
The intention is, to make the Observing-function of the BC / BCp available to a large number
of patients. Therefore the BC / BCp works in all measuring channels with high sensitivity -
modulation.
Regarding sensitivity the BC / BCp has a marginal immunity level of 3.0 V in the frequency-
range 150KHz to 80 MHz and 3.0 V/m in the frequency-range 800 MHz to 2.5 GHz.
Recommended protective distances between portable and mobile RF-telecommunication
devices
The SISS BABYCONTROL monitors are intended for use in an electromagnetic
environment, where the HR immunity is controlled. The client or user of BC / BCp can help
to avoid electromagnetic interference by keeping the minimum distance between portable
and mobile RF telecommunication equipment (transmitter) and the
BC / BCp – depending on the output-power of the communication device, as described
below.
nominal radiated
power of the
transmitter
in Watt
Protective distance in meter dependant on the transmitter frequency
150 KHz – 80 MHz
P d * 17 , 1

80 MHz – 800 MHz
P d * 17 , 1

800 MHz – 2.5 GHz
P d * 33 , 2

0,01 0,12 0,12 0,23
0,1 0,37 0,37 0,74
1 1,17 1,17 2,33
10 3,7 3,70 7,37
100 11,7 11,7 23,3
If the maximum nominal radiated power for transmitter is not specified in the table above, the
recommended protective distance d in meter (m) can be calculated acc. the equation, that
belongs to the respective column. P is the maximum nominal radiated power of the
transmitter in Watt (W) according to the declaration of the manufacturer of the transmitter.
Note 1: At 80 MHz and 800 MHz the higher range of frequency is applicable.
Note 2: This guide may not be applicable in all cases. The propagation of electromagnetic
parameter is influenced by absorptions and reflection of buildings, objects and persons.
Note 3: If the recommended protective distance can not be kept, BC / BCp should be
observed, to check the regular function.