User's Manual

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a.
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones
and land mobile radios, amateur radio, AM and FM radio broadcast, and TV broadcast cannot be
predicted theoretically with accuracy. To assess the electromagnetic environment of fixed RF
transmitters, an electromagnetic site survey shall be considered. If the measured field strength in the
location in which the IR-FT Infrared Forehead Thermometer is used exceeds the applicable RF
compliance level above, the IR-FT Infrared Forehead Thermometer should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be necessary, such
as re-orienting or relocating the IR-FT Infrared Forehead Thermometer.
b.
Within the frequency range from 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Table 4: Recommended safe distance
Recommended separation distance between portable and mobile RF communication equipment
and the IR-FT Infrared Forehead Thermometer
IR-FT Infrared Forehead Thermometer is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The buyer or user can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communication
equipment (transmitters) and the equipment or system, according to the maximum rated output power
of the communication equipment.
Maximum rated output
power of
transmitter/W
Separation distance according to the frequency of transmitter/m
150 kHz ~ 80 MHz
d =
P2.1
80 MHz ~ 800 MHz
d =
P2.1
800 MHz~ 2.5 GHz
d =
P3.2
0.01
Not applicable
0.12
0.23
0.1
Not applicable
0.38
0.73
1
Not applicable
1.2
2.3
10
Not applicable
3.8
7.3
100
Not applicable
12
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For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in meters (m) can be determined using the formula applicable to the frequency of the
transmitter, where P is the maximum rated output power of the transmitter in watts (W) provided by
the transmitter's manufacturer.
Note 1: At 80 MHz and 800 MHz, the formula used for higher frequency range applies.
Note 2: These guidances may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and human bodies.