Table A-23. Recommended Separation Distances - Covidien Puritan Bennett 560 User Manual

Specifications
Table A-22. Electromagnetic Immunity – Conducted and Radiated RF (Continued)
Note:
•
At 80 MHz and 800 MHz, the higher frequency range applies.
•
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection
from structures, objects, and people.
a
The ISM (industrial, scientific, and medical) bands between 150 kHz and 80 MHz are 6.765 MHz to 6.795 MHz; 13.553 MHz to 13.567 MHz; 26.957
MHz to 27.283 MHz; and 40.66 MHz to 40.70 MHz.
b
The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in the frequency range 80 MHz to 2.5 GHz are intended to
decrease the likelihood that mobile/portable communications equipment could cause interference if it is inadvertently brought into patient areas. For
this reason, an additional factor of 10/3 is used in calculating the recommended separation distance for transmitters in these frequency ranges.
c
Field strengths from fixed transmitters, such as base stations 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 fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the ventilator is used exceeds
the applicable RF compliance level above, the Puritan Bennett™ 560 Ventilator should be observed to verify normal operation. If abnormal performance
is observed, additional measures may be necessary, such as reorienting or relocating the Puritan Bennett™ 560 Ventilator.
d
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 10 V/m.

Table A-23. Recommended Separation Distances

The ventilator is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the ventilator can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters) and the ventilator as
recommended below, according to the maximum output power of the communications equipment.
Rated Maximum
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 distance d in metres
(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.
•
The ISM (industrial, scientific, and medical) bands between 150 kHz and 80 MHz are 6.765 MHz to 6.795 MHz;
•
13.553 MHz to 13.567 MHz; 26.957 MHz to 27.283 MHz; and 40.66 MHz to 40.70 MHz.
An additional factor of 10/3 is used in calculating the recommended separation distance for transmitters in the ISM
•
frequency bands between 150 kHz and 80 MHz and in the frequency range 80 MHz to 2.5 GHz to decrease the
likelihood that mobile/portable communications equipment could cause interference if it is inadvertently brought
into patient areas.
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection
•
from structures, objects, and people.
A-12
Separation Distance According to Frequency of Transmitter
150 kHz to 80 MHz 150 kHz to 80 MHz
(outside ISM bands)
d = 0,35 P
0.035 m
0.11 m
.35 m
1.1 m
3.5 m
80 MHz to 800
(in ISM bands)
d = 1,2 P
0.12 m
0.38 m
1.2 m
3.8 m
12 m
800 MHz to 2.5
MHz
d = 1,2 P d
0.12 m
0.38 m
1.2 m
3.8 m
12 m
GHz
= 2,3 P
0.23 m
0.73 m
2.3 m
7.3 m
23 m
User's Manual