Welch Allyn CP 150 12-lead resting electrocardiograph v.1.00.XX - User Manual - Manual (Page 52)

Recommended separation distances between portable
and mobile RF communications equipment and the CP 150
electrocardiograph
The CP 150 electrocardiograph is intended for use in an electromagnetic environment in
which radiated RF disturbances are controlled. The customer or user of the CP 150
electrocardiograph can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment
(transmitters) and the CP 150 electrocardiograph as recommended below, according to
the maximum output power of the communications equipment.
Separation distance according to frequency of transmitter (m)
Rated max. output power of
transmitter
(W)
150 kHz to 80 MHz
d = (1.2)
80 MHz to 800 MHz
d = (1.2)
800 MHz to 2.5 GHz
d = (2.3)
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 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 separation distance for 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.
48 EMC guidance and manufacturer’s declarations CP 150 12-lead resting electrocardiograph