Invacare Birdie User Manual page 48

Invacare®Birdie™
exceeds the applicable RF compliance level above, the patient lift should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as reorienting or relocating the patient lift.
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 patient
lift
The patient lift is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of
the patient lift can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the patient lift 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.
48
Separation distance according to frequency of transmitter [m]
150 kHz to 80 MHz
0.12
0.37
1.17
3.69
11.67
80 MHz to 800 MHz
0.12
0.37
1.17
3.69
11.67
800 MHz to 2,5 GHz
0.23
0.74
2.33
7.38
23.33
1575480-D