Using the Signal Generator:
Signal Clamp/ Injector
Signal Clamp
1. Plug the Signal Clamp into the connection socket on the Signal Generator.
2. Turn the Signal Generator on.
3. Check that the jaws of the clamp are clean. Place the Signal Clamp AROUND the cable
making sure that the jaws are able to fully close. The audible signal from the Signal
Generator should change in tone indicating that the clamp jaws have closed correctly.
WARNING NEVER attempt to place the Signal Clamp around electricity cables
that are deliberately suspended out of reach. They may be unsheathed or unprotected cables.
NOTE The Signal Clamp cannot apply a signal to a cable that is not earthed at both ends such as abandoned
cables that have been cut off where they appear above ground or small cables supplying unearthed equipment.
WARNING DO NOT use the Signal Injector on systems with voltages in excess of 240 volts AC. Domestic systems
will normally be below this voltage.
NOTE On two wire Protective Multiple Earth (PME) systems it may be necessary
to also provide an external earth using the yellow 10 metre Auxiliary Earth Lead and Earth Stake.
NOTE Always check with the owners that it is acceptable to interrupt the supply before connecting the Signal Injector.
NOTE Using the Signal Injector may cause the system protection to trip.
Signal Injector
1. Plug the Signal Injector into the connection socket on the Signal Generator and an
electric outlet.
2. Turn the Signal Generator on.
3. Turn the socket on. The audible tone from the Signal Generator will drop in pitch to
indicate a successful connection.
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