Search For A Short-Circuit - Chauvin Arnoux LOCAT-N C.A 6681 Manual De Instrucciones

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3.3.3

SEARCH FOR A SHORT-CIRCUIT

Preconditions:
The circuit must be dead.
•
Connect the transmitter as shown in figure 20.
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The measurement method is identical to that used in §3.1 Getting started
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Remarks:
During searches for short-circuits in sheathed wires and cables, the depths of
•
detection vary because the sheathed wires are twisted together in the sheath.
Experience has shown that only short-circuits having an impedance less than
20ohms can be detected correctly. The impedance of the short-circuit can be
measured with a multimeter.
During the detection process along the circuit, if the signals received are
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suddenly attenuated, the position detected is where the short-circuit is
located.
If the impedance of the short-circuit is greater than 20ohms, try using the
•
method of searching for a break in a circuit
to find the court-circuit.
60
Fig.20
(§3.2.2 Locating breaks in
C.A 6681 Cable Locater
lines)