Recommended separation distances between portable and mobile RF communications
equipment and the MS-74012 Pulse Oximeter
The model MS-74012 Pulse Oximeter is intended for use in an electromagnetic environment
in which radiated RF disturbance are controlled. The customer or the user of the model
MS-74012 Pulse Oximeter can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communication equipment
( transmitters) and the model MS-74012 Pulse Oximeter as recommended below, according
to the maximum output power of the communications equipment.
For transmitters rated at a maximum output power not listed above, the recommended
separation distance 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.
NOTE1 80MHz and 800MHz, the separation distance for the higher frequency range
applies.
NOTE2 These guidelines may not apply in all situations. Electromagnetic interference is
affected by absorption and re
fl
ection from structures, objects and people.
NOTE1 At 80MHz and 800MHz, the higher frequency range applies.
NOTE2 These guidelines may not apply in all situations. Electromagnetic propagation
is affected by absorption and re
fl
ection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base situation 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
fi
xed RF transmitters, an electromagnetic site
survey should be considered. If the measured field strength in the location in which
the model MS-74012 Pulse Oximeter is used exceeds the applicable RF compliance
level above, the Pulse Oximeter should be observed to verify normal operation. If
abnormal performance is observed, the additional measures may be necessary, such as
reorienting or relocating the model MS-74012 Pulse Oximeter.
b
Over the frequency range 150kHz to 80MHz,
fi
eld strengths should be less than 3V/m.
d
=
3.5
V
1
P
d
=
3.5
E
1
P
d
=
7
E
1
P
Recommended separation distances between portable and mobile RF communications
equipment and the EQUIPMENT or SYSTEM-for EQIPMENT and SYSTEMS that are not
LIFE-SUPPORTING
Separation distance according to frequency of transmitter (m)
150KHz to 80 MHz
80MHz to 800 MHz
800MHz to 2.5 GHz
Rated maximum
output of
transmitter
(W)
0.01
0.12
0.12
0.23
0.73
2.3
7.3
23
0.38
0.38
1.2
1.2
3.8
3.8
12
12
0.1
1
10
100
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PULSE OXIMETER
