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3. operation
3.1.
how to use the probe (fig.1).
3.1.1.
the probe of the receiver is built of coiled steel and may be bent as needed in order to reach wires in congested areas.
depending on the circuit characteristics and sensitivity settings the probe will pick up the the signal from the wire in a range of
positions. However, for the best possible range the reciever's probe tip (black cap) should be positioned perpendicular (at 90°) to
the wire being traced and either above or below it.
3.2.
Locating short circuit.
3.2.1.
connect the sender in series with the short-circuited wire, making sure one of the test leads is connected to the circuit's positive supply
(or connected to the negative for vehicles with positive supply connected to the chassis). A fuse socket (in the place of a blown
fuse), connector etc provides a convenient place.
3.2.2.
set the switch of the sender to "tone", the red led should light. if the red led is dim or does not light, please check battery. set the
rotary switch of the receiver to medium sensitivity position.
3.2.3.
move the probe along the wire, the receiver should give a tone.
3.2.4.
follow the wire or check it at different points, starting from the sender and moving towards the load. Audio signal (beeping sound)
indicates the integrity of the circuit. if the beeping stops it indicates that the probe has passed beyond the short circuit point.
3.2.5.
if it is difficult or impossible to get the receiver to pick up any signal, adjust the rotary switch of receiver and check again.
3.2.6.
the short circuit is located in the area where the audio signal stops or changes significantly.
3.3.
Wire tracing.
3.3.1.
Wire tracing hook up and procedures are essentially the same as for locating short circuits. the sender sees the load (light, accessory
etc) as the short circuit or connection to ground. for wire tracing, simply follow the wire with positive (beeping) audio indicators feedback
on the tracer from the source load.
for step by step instructions please refer to 3.2 locating short circuit.
fuse socket
or connector
fuse socket
or connector
3.4.
Locating open circuit.
WarninG ! observe the limits and safety precautions at all times.
‰
3.4.1.
connect the sender in series with the open-ended wire, making sure one of the units clips is connected to the circuit's positive supply or
ground. A fuse socket (with fuse removed), connector etc provides a convenient place as shown in.
3.4.2.
make sure that the clips are firmly attached to their connection points, and set the switch of the sender to "tone". in the case of having
connected the unit in any place other than the fuse socket, check that the circuit fuse is installed and in working condition (not open). if
necessary, replace with a new fuse of the same rating.
3.4.3.
switch receiver on, and adjust the rotary switch for the correct sensitivity.
3.4.4.
slowly sweep the wire with the receiver, ensuring that the probe is perpendicular and above or below the wire being traced and as close
as possible to it.
© Jack sealey limited
alternate hook-ups for locating open or short circuits and for tracing wires.
Original Language Version
fig.1
light Bulb socket
or connector
ff400 | issue 2 10/04/17
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