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Note 1: if the frequencies of communications device are 80MHz and 800MHz, the formula at a higher
frequency band should be used.
Note 2: this guide may not apply to all situations. Electromagnetic propagation is affected by absorption and
reflection from buildings, objects and human bodies.
a) As to RF transmitters, such as wireless (cordless/cellular) telephones and land mobile radio base stations,
amateur radio, AM/FM radio and television broadcasting, the field strength is unpredictable in theory. To assess
their electromagnetic environments, electromagnetic site survey should be considered; if the measured field
strength at the site of WIT-601A Infusion Pump is higher than RF compliance level, it is necessary to check
whether the pump runs normally. If not, compensation measures may be necessary, such as re-orientation and
positioning for the infusion pump.
b) In the frequency range of 150kHz - 80MHz, the field strength should be less than 3V/m.
Max Rated Output Power (W) of
Communication Equipment
Separation distance (m) based on communication equipment
frequency
150KHz to
80MHz
80MHz to
800 MHz
800 MHz to
2.5 GHz
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
As to the max rated output power not listed above, the recommended separation distance d (in meters) can be
determined by the formula in frequency column of corresponding transmitters, wherein P is the max rated
output power provided by the transmitter manufacturer (watts).
Note 1: if the frequencies of communications device are 80MHz and 800MHz, the formula at a higher
frequency band should be used.
Note 2: this guide may not apply to all situations. Electromagnetic propagation is affected by absorption and
reflection from buildings, objects and human bodies.
Recommended separation distance between portable/mobile RF communications device and infusion pump
WIT-601A Infusion Pump is intended to be used in the electromagnetic environment with control of radiated
RF disturbance. According to the max output power of communications device, buyers or users can prevent
electromagnetic interference by maintaining the minimum distance between portable/mobile RF
communications device (transmitters) and the infusion pump.
