Recommended Separation Distances - Smiths Medical 1884SS Operation Manual

Appendix C: Guidance and Manufacturer's Declaration

Recommended Separation Distances

The 3403 pulse oximeter is intended for use in an electromagnetic environment where radiated
RF disturbances are controlled. The customer or the user of the 3403 pulse oximeter can help
prevent electromagnetic interference by maintaining a minimum distance between portable
and mobile RF communications equipment (transmitters) and the 3403 pulse oximeter as
recommended below, according to the maximum output power of the communications
equipment.
The recommended separation distances between portable and mobile RF communication
equipment and the 3403 pulse oximeter is:
RATED MAXIMUM
OUTPUT POWER OF RF
TRANSMITTER (WATTS)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in meters (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.
NOTE: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE: These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.
WARNING! The monitor should not be used adjacent to or stacked with other equipment.
If adjacent or stacked use is necessary, the monitor should be observed to
verify normal operation in the configuration in which it will be used.
C-4
SEPARATION DISTANCE ACCORDING TO THE
FREQUENCY OF RF TRANSMITTER (METERS)
150 kHz to 80MHz 80 MHz to 800 MHz
d = 1.2 √P
0.12
0.38
1.2
3.8
12
Pulse Oximeter for Sleep Screening Operation Manual
800 MHz to 2.5 GHz
d = 0.35 √P d = 0.7 √P
0.035
0.11
0.35
1.1
3.5
0.07
0.22
0.7
2.2
7.0