Appendix A: Guidance and Manufacturer’s Declaration
A-4
Clinician’s Operation Manual
Recommended Separation Distances
RECOMMENDED SEPARATION DISTANCE BETWEEN PORTABLE AND MOBILE
RF COMMUNICATIONS EQUIPMENT AND THE WW1020/WW1000 PULSE OXIMETER
The WW1020/WW1000 pulse oximeter is intended for use in the electromagnetic environment
in which radiated RF disturbances are controlled. The customer or the user of the WW1020/
WW1000 pulse oximeter can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters)
and the WW1020/WW1000 pulse oximeter as recommended below, according to the maximum
output power of the communication equipment.
RATED MAXIMUM
OUTPUT POWER
OF TRANSMITTER
W
SEPARATION DISTANCE ACCORDING TO
FREQUENCY OF TRANSMITTER
m
150 kHz to 80 MHz
d = 1.2√P
80 MHz to 800 MHz
800 MHz to 2.5 GHz
3 V/m
d=1.2√P
20 V/m
d = 0.18√P
3 V/m
d=2.3√P
20 V/m
d = 0.35√P
0.01
.12
0.12
0.02
0.23
0.04
0.1
.38
0.38
0.06
0.73
0.11
1
1.2
1.20
0.18
2.30
0.35
10
3.8
3.79
0.57
7.27
1.11
100
12
12.00
1.80
23.00
3.50
For transmitters rated at a maximum output power not listed above, the recommended
separation distance
d
in meters (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.
Note 1 At 80 MHz and 800 MHz, the higher frequency range applies.
Note 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.
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