www.ssilocators.com
21
SERIES
Hold the
r
eceIver
antenna directly above and in line with the
s
onde
, as shown below. The
r
eceIver
sensitivity needs to be adjusted for a meter reading indication between 60% to 80%.
The radiation pattern of the
s
onde
is shown below. The PEAK signal is when the
r
eceIver
is held
directly over the
s
onde
with the antenna in line with the
s
onde
. Both
Ghost signals can be located
behind and in front of the
s
onde
. By locating the ghost signals, the user is confirming the accuracy of
the locate.
Start by following the suspected path of the pipe. Stop locating when the PEAK reading is found.
Then rotate the Receiver as shown in the figure below. When pivoting the Receiver, do not change the
vertical position. The Receiver will indicate a peak when the Receiver antenna is in line with the Sonde.
Now move the Receiver side to side (across the path of the pipe) as shown below. When the PEAK
if found, the Receiver is directly over the Sonde. Mark this location. Next, check for ghost signals in
front of and in back of the Sonde to confirm the location.
GHOST
GHOST
NULL
NULL
PEAK
PATH
SIDE
EARTH
PIPE
MOVE THE RECEIVER
SIDE TO SIDE AND
WHEN A PEAK
SIGNAL IS FOUND,
THE RECEIVER IS
OVER THE SONDE
EARTH
PIPE
PIVOT THE RECEIVER
SO THE ANTENNA
ROTATES NOT CHANGING
THE VERTICAL POSITION
FEED THE SONDE 10 FEET INTO THE PIPE
l
oCating
a
s
onde
