Farmer Chamber
Ionization Chamber
Type 30010, 30011, 30012, 30013
Technical Manual
34 D596.131.00/05 en
Recommended separation distances between portable and
mobile RF communications equipment and the product
The product is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the product can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmit-
ters) and the product as recommended below, according to the maximum output power of the communi-
cations equipment.
Rated maximum
output power
of transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
d = (3.5 / U
1
) √P = 1.2 √P
80 MHz to 800 MHz
d = (3.5 / E
1
) √P = 1.2 √P
800 MHz to 2.5 GHz
d = (7 / E
1
) √P = 2.3 √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 maximum output power not listed above, the recommended separation distance
d in meters (m) can be estimated 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 manu-
facturer.
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.
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