™
Page 27 of 59
3 Using the vLoc3 Series Receivers
As a result multiple signals radiate from cables and pipes in the area making it difficult to identify the target line. These return
signals are typically traveling in the opposite direction than the applied signal. The Signal Direction feature identifies which
direction the signal is flowing and hence the target line.
To use the signal direction mode:
• Connect the transmitter to the target line using a direct connection only.
• Turn the transmitter and receiver on and set both to:
ο
SD-USA – if in North America or any territory where the power system is 60Hz.
ο
SD-EUR – if in Europe or any territory where the power system is 50Hz.
•
Locate the cable. The receiver may or may not be flashing the “SD” Forward/Back arrows icon
•
A flashing SD arrow indicates that the unit needs to be synchronized with the transmitter. Even if the arrow is not flashing it is
always good practice to synchronize the system at the beginning of a survey to ensure reliable results and maximize the next
synchronization point's distance.
• To synchronize the receiver to the transmitter at the beginning of a survey pinpoint the line very close to the transmitter – be
sure that it is the correct line. Then, standing facing away from where the transmitter is attached, press the “i” pushbutton.
The unit will display the information screen showing the depth of line, signal current, and an “SD” icon positioned over the
return pushbutton. Pressing the return pushbutton will synchronize the system and return the unit to the locate screen.
The green forward arrow will light and not be flashing indicating the receiver is locked onto the signal. The system is now
synchronized.
Log 0
0.78m
233mA
50°42′59.90570′′N
3°26′35.54358′′W
27.50m
0
SD
62.6
SD-USA
25dB
• Proceed to locate, trace and pinpoint as required ensuring at all times the green forward arrow is illuminated. If the red
backward arrow illuminates at any time this indicates that the wrong line is being located.
62.6
SD-USA
25dB
62.6
SD-USA
25dB
•
At some point you may find that the SD arrow starts to flash this is indicating that synchronization with the transmitter has
deteriorated and a reset is required.