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R
T
-
,
RANSMITTER
USE
SETUP AND SIGNAL COUPLING
• Single-wire lines or pipes (with or without insulation against earthing)
The distance between the earth spike and the ends of the connected lines should be as great as
possible.
Note: It is possible that the return current will couple to adjacent lines, which could result in these
lines also being detected.
• Single-wire cable with metallic screen and earthing insulation
Short circuit between internal conductor and screen at the end of the cable, earthing at the
beginning and end of the cable.
Note: If the earth connections made are unfavourable, the current in the internal conductor and the
return current in the screen will cancel each other out. Under certain circumstances this can prevent
the cable from being detected. [Alternatively, a connection without an earth connection can also be
made.]
• Multiple-wire cable (internal conductor connected or disconnected) with metallic screen
and earthing insulation
Similar application to single-wire lines or pipes [connected screen, not inner lines].
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