Set the RECEIVER to the SONDE mode by holding the shift key while pressing the Depth Button). Next, hold
the RECEIVER antenna directly above and in line with the SONDE, as shown below. The RECEIVER sensitivity
needs to 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 RECEIVER is held directly
over the SONDE with the antenna in line with the SONDE. Both behind and in front of the SONDE ghost sig-
nals can be located. By locating the ghost signals, the user is confirming the accuracy of the locate.
Locating a Sonde
Start by following the suspected path of the pipe and use the 8879 RECEIVER to locate the SONDE. Stop locat-
ing when the PEAK reading is found. Then rotate the R
ECEIVER as shown in the figure below. When pivot-
ing 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 R
ECEIVER 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.
19
FEED THE SONDE 10 FEET (3 METERS) INTO THE PIPE
To Next Page
Loading...