Recommended Separation Distances Between Portable And Mobile Rf Communications Equipment And The Device - ResMed Lumis HFT User Manual

IEC60601-1-2 test
Immunity test
level
Radiated RF 3 V/m
IEC 61000-4-3 80 MHz to 2.5 GHz
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile
a
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 device is used exceeds the applicable RF compliance level above,
the device should be observed to verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as reorienting or relocating the device.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Notes:
• Ut is the AC mains voltage prior to application of the test level.
At 80 MHz and 800 MHz, 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.
Recommended separation distances between portable and mobile RF communications
equipment and the device
The device is intended for use in an environment in which radiated RF disturbances are controlled.
The customer or the user of the device can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the device as recommended below, according to the maximum output power of
the communications equipment.
Rated maximum output
power 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 determined 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.
24
Compliance level
10 V/m
80 MHz to 2.5 GHz
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz
d = 0.35 √P
0.035
0.11
0.35
1.1
3.5
Electromagnetic environment — guidance
Recommended separation distance
d = 0.35 √P
d = 0.35 √P 80 MHz to 800 MHz
d = 0.70 √P 800 MHz to 2.5 GHz
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 meters (m). Field strengths from fixed RF
transmitters, as determined by an electromagnetic site
a
survey, should be less than the compliance level in
each frequency range.
vicinity of equipment marked with the following
symbol:
80 MHz to 800 MHz
d = 0.35 √P
0.035
0.11
0.35
1.1
3.5
b
Interference may occur in the
800 MHz to 2.5 GHz
d = 0.7 √P
0.070
0.22
0.70
2.2
7.0