Mindray WATO EX-65, Operator'S Manual

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C-5
Recommended Separation Distance between Portable/Mobile RF Communications
Equipment and the Anesthesia Machine
The anesthesia machine is suitable for use in an electromagnetic environment in which radiated RF
disturbance are controlled. The customer or the user of the anesthesia machine can help prevent
electromagnetic interference by maintaining a minimum distance between portable/mobile RF
communications equipment (transmitters) and the anesthesia machine as recommended below,
according to the maximum output power of the communications equipment.
Separation distance in meters (m) according to frequency of the transmitter Rated
maximum
output power
of transmitter
(W)
150 kHz to 80
MHz
Outside ISM
bands
P
V
d
⎥⎦
⎤
⎢⎣
⎡
=
1
5 . 3
150 kHz to 80
MHz
In ISM bands
P
V
d
⎥⎦
⎤
⎢⎣
⎡
=
2
12
80 MHz to 800
MHz
P
E
d
⎥⎦
⎤
⎢⎣
⎡
=
1
12
800 MHz to 2.5 GHz
P
E
d
⎥⎦
⎤
⎢⎣
⎡
=
1
23
0.01 0.12 0.12 0.12 0.23
0.1 0.37 0.38 0.38 0.73
1 1.20 1.20 1.20 2.30
10 3.70 3.80 3.80 7.30
100 12.00 12.00 12.00 23.00
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 1: At 80 MHz to 800 MHz, the separation distance for the higher frequency range applies.
Note 2: 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.
Note 3: 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.
Note 4: These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.