ZOLL Propaq MD Rev A - Manual (Page 234)

Specifications
A-30 www.zoll.com 9650-0805-01 Rev. A
Recommended Separation Distances Between Portable and Mobile RF
Communications Equipment and the Propaq MD (IEC 60601-1-2 Table 205)
The Propaq MD unit is intended for use in an environment in which radiated RF disturbances
are controlled. The customer or the user of the Propaq MD unit can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile
RF communications equipment (transmitters) and the Propaq MD unit as recommended below,
according to the maximum output power of the communications equipment.
Note 1: At 80 MHz and 800 MHz, 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.
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 ZOLL Propaq MD unit is used exceeds the applicable RF compliance level above,
the Propaq MD unit should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as reorienting or relocating the Propaq MD unit.
d. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than [V
1
] V/m.
Separation Distance According to Frequency of Transmitter (meters)
Rated
maximum
output
power of
transmitter
150 kHz to
80 MHz
outside ISM
bands
150 kHz to
80 MHz in
ISM bands
80 MHz to
800 MHz
800 MHz to
2.5 GHz
W d = [3.5/3]P d = [12/3]P d = [12/10]P d = [23/10]P
0.01 0.12 0.40 0.12 0.23
0.1 0.37 1.26 0.38 0.73
1 1.17 4.00 1.20 2.3
10 3.69 12.65 3.79 7.27
100 11.70 40.00 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 Hz and 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.