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For EMF protection purposes, we are more concerned with the Peak setting since it will tell
us the full magnitude of exposure, the maximum power flux density detected, which is what
studies most correlate with harmful biological effects,
at least up until recently since they’ve
began correlating them with field strength.
Using Your Meter
Hold the meter with your arm slightly outstretched and
start pointing the meter around very slowly, methodically,
in all directions, while listening for any signal and watching
the LCD display. The display always gives readings in
microwatts per meter squared (
μW/m2
), but there are two
settings you can choose from to suit your measuring needs.
Experience tells us to always set it to the lowest scale that
gives you a valid reading. This is because some meters are
damaged by an overload of signals that exceed their
measurement range. The HF35C is not one of them.
Setting it to the top position of the display selector switch
(which is the top switch on the right side of the meter) will
set you on the most sensitive reading on the meter, which
(as you see there) is 0 to 199.9.
If you are in a location where the readings are high (e.g over
200) then slide the button down to read up to 1999 µW/m².
If t
he frequencies that it is detecting are, to use an old analog term, ‘pegging the meter’, or in
other words out of the meter’s upper range of capacity to detect, it will simply display the
number 1 on the left side.
This is a non-valid reading
–
meaning the field strength is
beyond the meter’s capability
to
display it. The meter simply stops reading and displays a 1.
The stylized EMF Spectrum that you see printed on the
meter body, depicts the range of frequencies that this meter
is factory-set to detect, which you can see is the range from
800 MHz to 2500 MHz (2.5 GHz). The acronyms correlate
to the frequency that device uses to broadcasts on: GSM
(Global Systems for Mobile Communications, or
Cellphones) uses 800
–
1,000 MHz, etc. Uplink means
sending wireless data, downlink means receiving wireless
data on those frequencies.
