Directions for use 63
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.
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 due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the Welch Allyn Home Blood Pressure Monitor is used exceeds the applicable RF
compliance level above, the Welch Allyn Home Blood Pressure Monitor should be observed to verify
normal operation. If abnormal performance is observed,additional measures may be necessary, such as
reorienting or relocating the Welch Allyn Home Blood Pressure Monitor.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Electromagnetic immunity
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