Using the Signal Generator:
Induction: Multiple Services
NOTE The signal will be radiated up to 3 metres (9’9”) either side of the Signal Generator but NOT directly below
when the Signal Generator is on its side.
Limitations of Induction Method
- There are limitations concerning what can be achieved when using a Signal Generator
on the Induction Mode compared to the Connected Mode. It is not normally possible to identify what the service is that has been
detected with an induced signal. If the signal can be followed far enough, a visible feature such as a valve cover or cable pit cover
may be found that can indicate the identity of the service.
Cables with a very small cross section may not have enough signal induced onto them to make them detectable.
It is often not possible to apply an induced signal onto just ONE specific buried service, in order to trace it alone,
when other services are positioned in a close proximity.
NOTE An induced signal cannot be applied to a buried service that lies beneath reinforced concrete. The reinforcing bars
will re-radiate the induced signal masking any signal that has been induced onto the buried service below.
It is important to check for the presence of adjacent services running
close, or parallel, to the service that you have already located.
1. Check that there are no accessories plugged into the
Connection Socket.
2. Turn the Signal Generator on and check that the batteries are OK.
3. Place the Signal Generator on the ground on one side over
the previously located service. That service will not have a signal
induced onto it.
4. Re-scan the area looking for another peak signal close to where
the original signal was found. This operation should be repeated until
you are satisfied that no further services can be located.
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