RIDGID SeekTech SR-20 - Manual (Page 17)

Ridge Tool Company 
Tools For The Professional TM
seekTech sR-20
Figure 26: Dipole Field
When locating a Sonde, first set up the locate:
• Activate the Sonde before putting it in the line. Select
the same Sonde frequency on the SR-20 and make
sure it is receiving the signal.
After the Sonde has been sent into the pipe, go to the
suspected Sonde location. If the direction of the pipe is
unknown, push the Sonde a shorter distance into the line
(~15 feet (5 m) from the access is a good starting point).
Location Methods
There are three major parts to locating a Sonde. The
first step is to localize the sonde. The second part is
pinpointing. The third is verifying its location.
Step 1: Localize the sonde
• Hold the SR-20 so the antenna mast is pointing
outward. Sweep the antenna and listen to the sound,
it will be highest when the antenna mast is pointing
in the direction of the Sonde.
• Lower the SR-20 to its normal operating position
(antenna mast vertical) and walk in the direction of the
Sonde. Approaching the Sonde, the Signal Strength
will increase and the audio tone will rise in pitch. Use
the Signal Strength and the sound to maximize the
signal.
• Maximize the Signal Strength. When it appears to
be at its highest point, place the SR-20 close to the
ground over the high signal point. Be careful to hold
the receiver at a constant height above the ground as
distance affects Signal Strength.
• Note the Signal Strength and move away from the
high point in all directions to verify that the Signal
Strength drops significantly on all sides. Mark the
point with a yellow Sonde Marker.
Figure 27: Poles and Equator of a Sonde
If while “getting closer” the Equator appears on the screen,
follow it in the direction of an increasing Signal Strength to
localize the Sonde.
Pole Pole
Equa
tor