burmeier Vertica-Homecare, Инструкция по эксплуатации

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Instruction Manual for Vertica-Homecare Bed
Page 77
Guidelines and Manufacturer’s Declaration – Resistance to Electromagnetic Interference –
The BED is intended for use in the electromagnetic environment described below. The operator or user of the BED should ensure
that it is used in such an environment.
Interference
resistance
testing
IEC 60601 - test limit Compliance
level Electromagnetic environment - guidelines
Portable and mobile radio devices should not be used
in closer proximity to the BED, including the cables,
than the recommended protection distance calculated
using the equation for the appropriate transmission
frequency.
Recommended protection distance:
Conducted HF
interference
according to
IEC 61000-4-6
3 V
eff
for 150 kHz to 80 MHz
3 V
eff
for 150 kHz to 80 MHz
d = 1.17 (P)
1/2
Radiated HF
interference
according to
IEC 61000-4-3
3 V/m
for 80 MHz to 2500 MHz
3 V/m
for 80 MHz to 2500
MHz
d = 1.17 (P)
1/2
for 80 MHz to 800 MHz
d = 2.33 (P)
1/2
for 800 MHz to 2.5 GHz
with P as the maximum rated power of the transmitter
in watts (W) according to the manufacturer of the
transmitter and d as the recommended protection
distance in metres (m).
b
According to an in-situ test
c
, the field strength of
stationary radio transmitters should be lower, for all
frequencies, than the compliance level.
d
Interference is possible when in the vicinity of
equipment bearing the following sign.
Note 1: The higher frequency range applies for 80 MHz and 800 MHz.
Note 2: These guidelines may not be applicable in all circumstances. The propagation of electromagnetic interference
is affected by buildings, objects and people due to absorption and reflection.
c
The field strength of stationary transmitters, such as base stations for cordless telephones and for public mobile
radio devices, amateur radio stations, and AM and FM radio and television transmitters cannot be predicted
exactly by theoretical means. In order to determine the electromagnetic environment with regard to the
transmitter, a study of the location should be considered. If the field strength measured at the location where
the BED is to be used exceeds the upper compliance limit, the BED should be observed to check that it
functions properly. Should any unusual performance characteristics be observed, additional measures could be
necessary, such as turning the BED or moving it to a different location.
d
Across the frequency range of 150 kHz to 80 MHz, the field strength should be less than 3 V/m.