4 Locating
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4.1.2
Detecting Power Signals
1.
Locating Power signals is very similar to detecting Radio signals as they are both passive signals.
2.
Hold the vScan vertically and away from likely positions of cables or pipes.
3.
Adjust the sensitivity control so that the bar graph reading is just starting to show some movement. The
sensitivity control should be at or close to maximum sensitivity.
4.
Now follow the procedure described above in the Radio mode section.
4.2
Active Locating
The term “Active Locating” describes the action of locating a cable or pipe by detecting a specific signal that
has been injected into that line. It has the benefit that, unlike passive detecting, the operator is in control of
the signals and therefore can be more specific about what line is detected. That is to say active signals can
be used for line tracing or identification. Also Passive signals are not always present on a line so using active
signals ensures more lines are detected.
To inject a signal requires the use of the vScan transmitter. The signal can be injected, or applied, to the
target line in a variety of ways.
4.2.1
Direct Connection
This method involves making an electrical connection to the cable or pipe.
WARNING
When connecting to a cable, only connect to the sheath of that cable. The
direct connection leads are NOT designed for connection to live cables.
WARNING
Do not touch metal parts of the connection clips when connecting to the line
or when the transmitter is on.
