Atmos Variotherm plus Operating Instructions Manual page 25

11.0 Notes on EMC
NOTE 1 With 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2
These guidelines may not be applicable in all cases. The emanation of electromagnetic waves is affected by absorption and
reflection of buildings, objects, and people.
a
The field strength of stationary transmitters, such as base stations of cellular phones and mobile terrain radio equipment,
amateur radio transmitters, cbm broadcast and TV stations cannot be predestined exactly. To determine the electromagnetic
environment in regard to stationary transmitters, a study of the location is to be considered. If the field strength measured
at the site where the Variotherm plus is used exceeds the compliance level above, the Variotherm plus must be observed to
demonstrate proper function. If abnormal performance is observed, additional measures may be necessary, such as reorient-
ing or relocating the Variotherm plus.
b
Within the frequency range of 150 kHz to 80 MHz, the field strength should be below 3 V/m.
11.4 Recommended separations between portable and mobile RF communications
equipment and the Variotherm plus
The Variotherm plus is intended for use in an electromagnetic environment in which HF disturbances are controlled. The cus-
tomer or user of the Variotherm plus can thereby help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communication equipment (transmitters) and the Variotherm plus – depending on the output of
the communication device as indicated below.
Nominal output of the
transmitter
W
0.01
0.1
1
10
100
For transmitters for which the maximum nominal output is not indicated in the above table, the recommended safety distance
d in meters (m) can be determined using the equation belonging to the respective column whereas P is the maximum nominal
output of the transmitter in watts (W) acc. to manufacturer's specification.
NOTE 1
With 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2
These guidelines may not be applicable in all cases. The emanation of electromagnetic waves is affected by absorption and
reflection of buildings, objects, and people.
Safety distance, depending on transmit-frequency m
150 kHz to 80 MHz
d = [ 3,5 / 3] √P
0.12
0.37
1.2
3.69
11.66
80 MHz to 800 MHz
d = [ 3.5 / 3] √P
0.12
0.37
1.2
3.69
11.66
800 MHz to 2.5 GHz
d = [ 7.0 / 3] √P
0.24
0.74
2.4
7.38
23.32
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