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display on the screen but remembered by the operator. For example, 850 multiply
by 0.8 is equal to 680.
4) Hold the antenna only just above the ground and move the receiver right and left
across the cable once separately on the same horizontal line. Stop at the point
where the numerical value of signal strength is equal to the remembered value
approximately, such as 680. Mark the two points.
5) The distance between the two marked points tested by ruler or eyes is the depth of
the buried target cable.
4.3 Identification of Basic Operating Cables
Identification of cable
The theory of the cable identification is the same as the cable tracing and the way of
applying a signal to the target cable is also the same. But the signal detecting method
is different. It is cable identification that the receiver detects the signal by placing the
clamp around the exposed point of the target cable to achieve a point-point detecting.
Power failure cable identification (direct connection)
1. Requirements
1
)
Must be dead cable that is de-energized and out of service.
2
)
Know one end of the target cable at least and disconnect the known end from the
system including the neutral wire and earth wire.
2. Applying the transmitter's signal via direct connection leads: The procedure is the
same as 2 of 4.2.1.
3. Signal detection (recognition)
1) Connect the clamp with the receiver by the connection lead equipped with