Nellcor Oximax NPB-40, Service Manual

Page: 78 / 114

Specifications
70
The NPB-40 is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or user of the NPB-40 can
help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and
the NPB-40 as recommended below, according to the maximum output of the
communications equipment.
Recommended Separation Distances between Portable and Mobile RF
Communications Equipment and the NPB-40 (IEC 60601
-
1
-
2)
Frequency of
Transmitter
150 kHz to
80 MHz
80 MHz to
800 MHz
800 MHz to
2.5 GHz
Equation
Rated Maximum
Output Power of
Transmitter in
Watts
Separation
Distance in
Meters
Separation
Distance in
Meters
Separation
Distance in
Meters
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters rated at a maximum output power not listed above, the
separation distance can be estimated using the equation in the
corresponding column, where P is the maximum output [power rating of the
transmitter in watts (W)] according to the transmitter manufacturer.
Note: At 80 MHz to 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.
d
3.5
V
1
-------
P
=
d
3.5
E
1
-------
P
=
d
7
V
1
-------
P
=