Mastech MS6818 - Classifying or Identifying a Covered Circuit

Operating instructions for Cable Detector, article 37270766
Page 27 of 34
5.2.5 Classifying or identifying a covered circuit
Requirements:
 The circuit must be voltage-free.
 The ends of the centre wires must be twisted together and conductive to each other.
 Connect the transmitter as shown in Fig. 3-2-5.
 The measurement procedure is the same as shown in the example.
1. If the cable is live, first switch off the current to make the cable free of current.
2. The ends of the unshielded centre wires must be twisted together and conductive to each other.
3. If using only one transmitter, run multiple tests by
4. changing the connection between the transmitter and centre wire.
1. Changing the connection between the transmitter and centre wire makes it possible to distinguish
between different circuit when the transmission coding changes.
2. Adjust the transmitter power to suit the different search radii.
3. If necessary, purchase a transmitter with different transmission signals.