English
54
C.A 6681 Cable Locater
3.2.5
DETECTION OF THE CONSTRICTED (PLUGGED) PART OF A NON-
METALLIC PIPE
Preconditions:
The pipe must be made of a non-conducting material (such as plastic);
The pipe must not be live;
The transmitter is connected to a metallic helical tube (flexible metallic tube or
pipe) and to an auxiliary earth as shown in Fig. 14;
The measurement method is identical to that used in §3.1 Getting started
Fig.14
Remarks:
If there is a current in the pipe, cut off its supply and connect it correctly to
earth when the pipe is not live.
One end of the pipe must be correctly earthed, and the earth of the
transmitter must be at a certain distance from the pipe to be located. If the
estimated distance is too short, the signal and the circuit cannot be located
precisely.
