Otto Bock Empower 1A1-1 Instructions For Use Manual page 42

Technical data
Directive and manufacturer's declaration – electromagnetic interference immunity
Line-conducted HF IEC
61000-4-6
Radiated HF IEC
61000-4-3
NOTICE 1: The higher frequency range applies at 80 MHz and 800 MHz. NOTICE 2: These directives may not apply in all
situations. Electromagnetic propagation is influenced by absorption and reflection on buildings, objects and persons.
a Field strengths of fixed transmitters, such as base stations for radio telephones (mobile radio/wireless) and land mobile
radio, amateur radio, AM and FM radio, and television transmitters cannot be exactly determined theoretically. An electromag­
netic site survey should be considered to evaluate the electromagnetic environment due to fixed HF transmitters. If the meas­
ured field strength at the location where the prosthetic foot is used exceeds the aforementioned applicable HF compliance
level, the prosthetic foot must be observed during normal use. Should deviating performance be noted, additional measures
b
Within the frequency range of 150 kHz to 80 MHz, the field strength must be less than 10V/m.
Recommended separating distances between wearable and portable HF communication devices and the battery
The battery charger is intended for use in an electromagnetic environment in which radiated HF interference can be con­
trolled. The customer or user of the battery charger can help avoid electromagnetic interference by maintaining a minimum dis­
tance between wearable and portable HF communication devices (transmitters) and the battery charger, as recommended in
the following, according to the maximum output power of the communication device.
Maximum nominal output
power of the transmitter
(W)
0.01
0.1
1
10
100
For transmitters with a maximum nominal output power that is not listed above, the recommended separating distance (d) in
metres can be calculated using the equation applicable for the frequency of the transmitter, where (P) is the maximum nominal
output power of the transmitter in watts (W) according to the transmitter manufacturer.
NOTICE 2: These directives may not apply in all situations. Electromagnetic propagation is influenced by absorption and
42
NOTICE: U is the AC mains voltage before applying the test level.
T
3 Vrms 150 kHz to 80
MHz
3 V/m 80 MHz to 2.5
GHz
may be required, for example realigning or repositioning the prosthetic foot.
Separating distance according to transmitter frequency (m)
150 kHz to 80 MHz d=1.2√P 80 MHz to 800 MHz d=1.2√P
0.12
0.38
1.2
3.8
12
NOTICE 1: The higher frequency range applies at 80 MHz and 800 MHz.
reflection on buildings, objects and persons.
3 V Wearable and portable HF communication
devices should not be operated closer to a com­
10 V/m
ponent of the battery charger, including cables,
than the recommended separating distance cal­
culated using the equation applicable for the fre­
Recommended separating distance:
P stands for the maximum output power of the
transmitter in watts (W) according to the transmit­
ter manufacturer, and d is the recommended sep­
Field strengths of HF transmitters determined
according to an electromagnetic site survey
be lower than the compliance level in every fre­
Interference may occur in the vicinity of devices
that are marked with the following symbol:
charger
0.12
0.38
1.2
3.8
12
quency of the transmitter.
d=1.2√P
d=1.2√P 80 MHz to 800 MHz
d=2.3√P 800 MHz to 2.5 GHz
arating distance in metres (m).
b
quency range .
800 MHz to 2.5 GHz
d=2.3√P
0.23
0.73
2.3
7.3
23
Empower 1A1-1
a must