Invacare Etude Plus HC User Manual page 22

Immunity test IEC 60601–1–2 test level Compliance level
Radiated RF
3 V/m
IEC 61000-4-3
a Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios,
amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the
electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the
measured field strength in the location in which the medical bed is used exceeds the applicable RF compliance level above, the
medical bed should be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the medical bed.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than [V1] V/m.
At 80 MHz and 800 MHz, the higher frequency range applies.
Recommended separation distances between portable and mobile RF communications equipment and the medical bed
The medical bed is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the medical bed can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the medical bed as recommended below,
according to the maximum output power of the communications equipment
Rated maximum output
of transmitter
[W]
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above the recommended separation, distance d in metres (m)
can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power
rating of the transmitter in watts (W) according to the transmitter manufacturer.
At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection
from structures, objects and people.
1579562-B
3 V/m
Separation distance according to frequency of transmitter [m]
150 kHz to 80 MHz
0.12
0.37
1.17
3.69
11.67
Electromagnetic environment – guidance
where P is the maximum output power rating
of the transmitter in watts (W) according to
the transmitter manufacturer and d is the
recommended separation distance in metres
(m). b
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey,
should be less than the compliance level in each
frequency range.
Interference may occur in the vicinity of
equipment marked with the following symbol:
80 MHz to 800 MHz
0.12
0.37
1.17
3.69
11.67
Technical data
80 MHz to 800 MHz
800 MHz to 2,5 GHz
b
800 MHz to 2,5 GHz
0.23
0.74
2.33
7.38
23.33
a
23