Welch Allyn CP 50 Directions For Use Manual page 54

50 Guidance and manufacturer's declarations
Recommended separation distances between portable and mobile RF communications
equipment and the Welch AllynCP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph
The Welch AllynCP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled. The customer or user of the Welch AllynCP 50™ and CP
50 Plus™ 12-lead resting electrocardiograph can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters) and the Welch AllynCP 50™ and CP
50 Plus™ 12-lead resting electrocardiograph as recommended below, according to the maximum output power of the
communications equipment.
Rated max. output
power of transmitter
(W)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distanced 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.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz 80 MHz to 800 MHz
d= (1.17) d= (1.17)
0.12 0.12
0.37 0.37
1.17 1.17
3.70 3.70
11.67 11.67
800 MHz to 2.5 GHz
d= (2.33)
0.23
0.74
2.33
7.37
23.33