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3 Using the vLoc3 Series Receivers
To make a direct connection, insert the direct connection connector to the transmitter. Insert the ground stake into the ground
a few meters perpendicular to the line. Connect the black lead to the ground stake. Next take the red lead and connect to the
target line.
Switch on the transmitter by pressing and holding the On/Off button down for a couple of seconds. Select the desired frequency
depending on the application. Check for a good connection by either noting the mA output on the LCD or noting the change in
tone rate when disconnecting and then reconnecting the red lead.
Always start with low output and increase the output if the received signal is not strong enough. Setting the output to high when
it is not required may result in some of the signal bleeding off onto other services and will drain more power than necessary from
the battery.
It is sometimes impossible to find a suitable projection to apply the connection clip to a ferrous material. If this is the case use
a magnet to contact the line and then clip the red clip to the magnet. A good example of this is to make a connection to a street
lighting circuit. Usually it is the practice to connect the sheath of a lighting cable to a street lamp's metallic inspection cover.
Making a connection to the inspection plate will energize the cable via the plate and sheath. Usually there is no projection on
which to clip so using the magnet on the plate provides a suitable clipping point.
3.2.2
Signal Clamp (for frequencies above 8kHz)
In many situations when it is not possible to make a direct connection to a cable, a signal clamp will provide an efficient and safe
method to apply a locate signal.
Note that for best results the cable should be grounded at both ends. The clamp should be fully closed for optimal current
induction. A small amount of current will still be induced if the jaws are open.
When clamping around a cable make sure the clamp is placed below the grounding point as shown below.