SPAN PressureGuard APM Owner's Manual page 22

radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the device is used exceeds the applicable RF compliance level above, the device should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the device.
d/ Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications
equipment and this device:
This device is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer
or the user of this device can help prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and this device as recommended below, according to the maximum output
power of the communications equipment
Rated maximum output
power
of transmitter
W
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance
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.
Separation distance according to frequency of transmitter m
150 kHz to 80 MHz
1 2 .
d = P
0.12
0.38
1.2
3.8
12
80 MHz to 800 MHz
1 2 .
d = P
0.12
0.38
1.2
3.8
12
20
800 MHz to 2,5 GHz
2 3 .
d = P
0.23
0.73
2.3
7.3
23
d
in meters (m) can be
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