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Guidance Tables
Guidance and Manufacturer's Declaration – Electromagnetic Immunity / Industrial Electromagnetic Environment
Recommended Separation Distances between
Portable and Mobile RF Communications Equipment for Industrial, Scientific, and Laboratory Equipment and Systems
Recommended Separation Distances between Portable and Mobile RF Communications Equipment and Refractix.
Refractix is intended for use in the electromagnetic environment in which radiated RF disturbances are controlled. The customer or user of Refractix can
help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF Communications Equipment and Refractix as
recommended below, according to the maximum output power of the communications equipment.
Separation (m)
Max Output Power of
150 kHz to 80 MHz Outside
Transmitter (W)
ISM Bands
d = 1.2(√P)
0.01
0.1166
0.1
0.3689
1
1.1666
10
3.6893
100
11.6666
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
manufacturer.
Note 1: At 80 MHz and 800 MHz, the separation distance for 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.
Note 3: The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in the frequency range 80 MHz to 6.0 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 has been incorporated into the formula used in calculating the recommended separation distance for transmitters in these
frequency ranges.
Separation (m)
150 kHz to 80 MHz
In ISM Bands
d = 1.94444(√P)
0.1944
0.6149
1.9444
6.1489
19.4444
Separation (m)
Separation (m)
80 to 800 MHz
800 MHz to 6 GHz
d = 1.2(√P)
d = 2.3(√P)
0.1166
0.2333
0.3689
0.7378
1.1666
2.3333
3.6893
7.3786
11.6666
23.3333
13910000-101 Rev. A • 33
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