Richard Wolf 2271 - Page 9

5
GA--A 181
Guidance and manufacturer’s declaration -- electromagnetic immunity for products that are not life--supporting
The product is intended for use in the environment specified below. The user should assure that the product is used in such an environment.
Immunity test IEC 60601 test levels
Compliance
level
Electromagnetic environment -- guidance
Conducted HF interference
to IEC 61000--4--6
Radiated HF interference
to IEC 61000--4--3
3V
rms
150kHz to 80 MHz
3V/m
80 MHz to 2.5 GHz
Yes
Portable and mobile RF communications equipment should be
used no closer to any part of the product, including cables,
than the recommended separation distance calculated from
equation applicable to the frequency of the transmitter.
Recommended separation distance:
d=1.2p P
d=1.2p P for 80 MHz to 800 MHz
d=2.3p P for 800 MHz to 2.5 GHz
P = Nominal power output rating of the transmitter in watts (W)
(according to the transmitter manufacturer)
d = recommended separation distance in meters (m)
Field strengths from fixed RF transmitters, as determined by
an electromagnetic site survey
1
, should be less than the
compliance level in each frequency range
2
.
Interference may occur in the vicinity of devices with the
following symbol:
REMARKS: At 80 MHz and 800 MHz the higher frequency range applies.
These guidelines may no apply in all situations, as the propagation of electromagnetic waves is affected by absorption and
reflexion from buildings, objects and people.
1 = The field strength of fixed transmitters (e.g. base stations for radio telephones, land mobile radios, amateur radio, radio broadcast and
TV broadcast, ...), cannot be predicted theoretically with accuracy . To assess the EMC environment due to fixed transmitters an
electromagnetic site survey should be conducted. If the measured field strength in the location in which the product is used exceeds
the applicable compliance level above, the product should be observed to verify normal operation.
If abnormal performance is observed, additional measures may be required, such as reorienting or relocating the product.
2 = Over the frequency range between 150 kHz and 80 MHz the field strength should be below 3 V/m.
The recommended separation distances between portable and mobile HF telecommunication devices and
devices which are not life--supporting
The product is intended for use in an electromagnetic environment with HF disturbances are controlled.
The user can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile
HF telecommunications equipment and the product.
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Separation distance as a function of transmitter frequency (m)
Rated nominal output pow er of the
transmitter (Watts)
150 kHz to 80 MHz
d=1.2p P
80 MHz to 800 MHz
d=1.2p P
800 MHz to 2.5 GHz
d=2.3p P
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters rated at a nominal output power not listed in the table above, the recommended separation distance (d) in meters (m) can
be determined using the applicable equation (observe frequency). P = nominal power of the transmitter in Watts (W).
REMARKS: At 80 MHz and 800 MHz the higher frequency range applies.
These guidelines may no apply in all situations. Electromagnetic propagation is affected by absorption and reflexion
from buildings, objects and people.