EMFields AM-10, Руководство пользователя

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5
Operation
Ensure that you have correctly inserted appropriate batteries (2 x AA
cells). Move the power switch into the “On” position. The LCD display
should briefly display “Acoustimeter, © EMFields 2009”, changing to
readings after a short time.
Hold the bottom of the instrument in one hand at least 30cm from your
body as close proximity to your body will affect the readings. Keep your
hands away from the top of the instrument as this contains the antenna
which is located inside the case at the rear towards the top. The
Acoustimeter can be placed upon a stable surface, but movements nearby
can still affect the RF/microwave levels.
Adjust the volume to an appropriate level (usually somewhere about mid -
volume is best; only use maximum when monitoring weak signals).
The instrument will display the peak signal strength and the average
power on both the LEDs and the LCD. Slowly turn the instrument around
in all directions. Stop moving the instrument and hold it still to take a
reading.
Bear in mind that even moving the meter small distances can result in
detecting very different levels of microwave energy. Microwaves are
reflected off the ground and other surfaces so it is important to check all
angles. The highest readings will often be found when holding the
instrument facing you at an angle between horizontal and vertical.
We recommend taking the highest reading found in any one spot, as this is
when the antenna is most closely aligned with the directionality of the
signal. The “Peak-hold” function will display the highest peak reading
measured until the instrument is turned off and on again.
If there is hardly any noise with the volume turned up then the instrument
is not detecting any amplitude modulated (i.e. “pulsing”) signals. Other
sounds represent the amplitude modulation and digital pulsing of RF
signals detected by the instrument. It is sometimes possible to hear voices
and music when very close to powerful medium and short-wave AM
transmitters, which are outside of the normal RF frequency detection
range of the meter. When no LEDs are illuminated any quiet ticking
sounds heard should be ignored.