Manual
20
5.2.2.1 Searching for a short circuit in the current circuit
Preparation:
-
The circuit must be unloaded.
-
Connect the transmitter according to the following figure.
- If there is current in the cable, first turn the power off to make the cable unpowered.
- When searching for short circuits in the coated electric wires and cables the search depths vary,
because the core wires in the jacket are twisted with each other. According to our experience only the
short circuits with an impedance less than 20
Ω can be tracked correctly. The impedance of the short
circuit can be measured with a multimeter.
- If the impedance of the short circuit is higher than 20
Ω, try to apply the method of searching for the
breaks in current circuits to locate the short circuit. Use of a relatively strong current for that in order to
connect the defective part (low
Ω-connection) or to interrupt it.
- If the incoming signals at the receiver suddenly become weaker in the course of searching along the
pipeline, the place, where a short circuit is located, is found.
- Set the power of the transmitter in order to adjust it to different search radii.
- Select the manual mode on the receiver and the appropriate reception sensitivity to locate the circuit
accurately.
