Triplett Mitigator Loop Coil – 3232 - Manual (Page 5)

Figure 4
Another example of a “Homemade” Mounting Bracket
6.1: DON’T BE FOOLED!
The Loop Coil only responds to magnetic fields whose lines of force pass through the opening in the
Loop Coil. This is shown in Figure 5. If the coil is oriented so that the lines of force do not pass through
the Loop Coil opening (Figure 6), the coil will not produce an output signal.
The Loop Coil only measures the magnetic field that actually passes through the coil opening. “Point-
ing” the coil only serves to position the coil so that it picks up the most signal. For example, if a Loop
Coil survey is made down a road that has power lines on both sides of the road, do not be fooled into
thinking that you are measuring the magnetic field of only one of the power lines because you have the
coil “pointed” at a particular line. THE COIL MEASURES THE MAGNETIC FIELD AT THE LOCATION
OF THE COIL, NOT WHERE THE COIL IS POINTED. Pointing the coil only serves to maximize signal
strength.
In such a situation, the user can determine which power line contains the harmonics of interest by going
to a location where the lines separate from each other and measuring each line individually or by making
measurements as close to each line as possible, causing the stronger magnetic field of the closer line to
“override” the weaker field from the farther line.
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