
36
Method of maximum
Operation (see diagram) :
1/ Start from the point where the Emitter injection lead is connected
(See A).
2/ Select max. sensitivity and move the Receiver around the Emitter to
find the direction of the cable. (see B and C).
3/ Continue in this way progressively reducing the sensitivity until obtaining
max. indication on the Vu-meter and the strongest audio signal.
4/ "Trace" the cable run in this way to its source (See D).
NB:
The method of maximum gives better accuracy when the user is
able to hold the Receiver close to the wire being traced. Accuracy
is better than a centimetre. Nevertheless, if the wire is inaccessible
(20 cm. inside a wall for example), its position can only be found to
the nearest 20 cm. In this case the minimum method can be used
to overcome this problem.
Earth at a
distance
and
independently
from the socket
source
EMITTER
Fuse-box
RECEIVER
START
Max. sensitivity
Right direction
The LED furthest to the right
is
Medium sensitivity
Still the right direction.
The LED furthest to the right
is
Min. sensitivity.
Wrong direction
Medium sensitivity
7
7
Conductor
being traced