Megger Easyloc Basic, Руководство по эксплуатации

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4.2.6 Masking-Out Lines
Masking-out lines Under certain circumstances lines at lower depths can 'hide' deeper, adjacent lines,
thus making it more difficult to locate them.
In such cases, the transmission characteristics of the
Easyloc Tx transmitter can be
fully utilised and the lines which have already been located can be masked out.
How to proceed Follow the steps listed below in order to locate lines by masking-out adjacent lines:
Step Action
1
Use the Easyloc Rx and Easyloc Tx to locate and pinpoint a buried line
(see section 4.2.3 General site surveying ).
2 With the Easyloc Rx rested on the ground straight above the located
line, ask a colleague to place the Easyloc Tx on its back (see picture)
nearby the line path (at least 15 m away from the receiver).
3 Slide the Easyloc Tx across the line until the signal strength bargraph is
lowest, indicating that the transmitter is directly above the line which,
thus, is masked-out.
Note that adjacent lines may not be parallel with the first cable
route, so sweep the receiver around in a circle about 10 m - 15 m
radius from the transmitter, with the handle pointing towards the
transmitter. Any metallic lines within 2.5 m of the transmitter will be
coupled with the transmitted signal
4 Pinpoint and determine the direction of any buried lines (see section
4.2.2.3 Handling the receiver ).
Line with good
inductive coupling
Line with weaker
inductive coupling
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