Instructions / Assembly
14
Listen to the strength of the signal and look at the right half of the meter. When it reaches full scale and
you are unable to turn it down any fuher, ip the toggle witch to“Near”. When you reach what seems
to be the maximum signal, and eve direction you move from there’s a lower signal, you have reached
the “Peak Spot”.
Mark this spot and then move o in another direction and repeat the locating procedure. Keep doing
this until you keep returning to the same spot. You should be able to narrow this rough-in area to within
a few inches. If you are just locating a septic tank, and knowing its depth is not critical, you are ready to
dig. The Peak Spot you have marked is directly above the transmitter, near the inlet bae. Also be
aware that if the transmitter is turning in the tank, it is viually impossible to determine its depth.
If you need to know the lay of the line or the depth of the line,read on.
Determine the lay of the line
Before you can determine the depth of your transmitter, you must establish the lay of line.
Do not skip this step!
Step 4 or 5 feet away from the Peak Spot you marked.Hold the receiver level straight in front of you at
waist height, as before,but don’t wave it back and foh, just hold it straight. Adjust the sensitivity so
that the meter reads about the middle of the scale. Walk in a circle around the peak Spot, keeping your
inside shoulder pointing at the Peak Spot. This would be called a “pylon turn” like if you were ying an
airplane. As you walk the circle slowly, watch the meter and listen to the sound. At two distinct points in
the circle, the signal strength will suddenly drop, then come back up as you move fuher.
These are “null” points. Take the time to precisely determine these points and mark them (the point is
directly below the center of the rod). You will nd that they are directly across the circle from each
other, and describe a line that passes right through the peak area.