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About Measurement Surveys
When you perform surveys, it is important that you observe a
few guidelines to insure accurate readings:
•
Make sure you move the probe to obtain a maximum
reading.
•
Keep the arm holding the probe extended out from your
body as far as possible with the probe pointed towards
the source of radiation.
•
Low frequency measurements (<50 MHz and especially
<10 MHz) require special techniques because the
human body acts as an antenna and introduces errors.
Using the best technique, place the probe next to the
meter on a non metallic stand such as a wooden ladder
or cardboard box. Stand back and read the meter
without touching it.
The human body has far less affect on magnetic fields and
therefore these measurement techniques are less critical for
magnetic fields than they are for electric fields.
Refer to the operations manual for more complete information
on planning, conducting, and documenting measurement
surveys.
Obtaining a Reading
A reading is obtained by holding your Model 8718 in one hand
and your probe in the other. As you approach the source,
observe the bar graph and measured value of signal strength
on your meter. If you know where the source of energy is, point
the probe towards it. If you do not know where the source is
located or there are multiple sources, hold the probe above
your head pointed up at about 45 degrees above the
horizontal. Rotate the probe in a circle to find the direction
where the maximum indication is obtained. The bar graph is a
useful tool in obtaining the maximum indication.
