Weinmann MEDUVENT Standard - Page 171

WM 67851 01/2021
MEDUVENT Standard EN 171
16 Technical data
a
The ISM frequency bands (for industrial, scientific and medical applications) 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.
The amateur radio bands between 0.15 MHz and 80 MHz are 1.8 MHz to 2.0 MHz, 3.5 MHz to 4.0 MHz,
5.3 MHz to 5.4 MHz, 7 MHz to 7.3 MHz, 10.1 MHz to 10.15 MHz, 14 MHz to 14.2 MHz, 18.07 MHz to
18.17 MHz, 21.0 MHz to 21.4 MHz, 24.89 MHz to 24.99 MHz, 28.0 MHz to 29.7 MHz, and 50.0 MHz to
54.0 MHz.
b
The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in the frequency
range from 80 MHz to 2.7 GHz are intended to reduce the likelihood of mobile/portable communication
equipment causing interference if it is unintentionally brought into the patient’s vicinity. This is why the
additional factor of 10/3 is applied when calculating the recommended separation distances in these
frequency ranges.
c
The field strength of stationary transmitters, such as the base stations for radio-frequency telephones and
land-based mobile radio equipment, amateur radio stations, AM and FM radio and television transmitters,
for example, cannot be precisely determined theoretically in advance. A survey of the site should be
considered in order to determine the electromagnetic environment with regard to stationary transmitters.
If the field strength measured at the site where MEDUVENT Standard is used exceeds the above compliance
levels, MEDUVENT Standard should be monitored to provide evidence of function in accordance with its
intended purpose. If unusual performance characteristics are observed, additional measures may be
required, such as a different orientation or location for MEDUVENT Standard.
d
Field strength should be below 3 V/m across the frequency range of 150 kHz to 80 MHz.
Guidelines and manufacturer's declaration - electromagnetic immunity
MEDUVENT Standard has been tested for immunity to the radio services listed below.
If the field strength measured at the site where MEDUVENT Standard is used exceeds the above compliance
levels, MEDUVENT Standard should be monitored to provide evidence of function in accordance with its
intended purpose. If unusual performance characteristics are observed, additional measures may be
required, such as a different orientation or location for MEDUVENT Standard.
Testing
fre-
quency
Frequency
band
a
Radio
service
a
Modulation
b
Max.
output
power
Dis-
tance
Immunity
test level
MHz MHz W m V/m
385 380 to 390 TETRA 400
Pulse modulation
b
18 Hz
1.8 0.3 27
450 430 to 470
GMRS 460,
FRS 460
FM
c
±5 kHz deviation
1 kHz sine
2 0.3 28