Locating & Tracking Buried Wires; Measuring Depth; Tracking Behind Walls; Locating Circuit Breakers (Light Commercial & Residential Applications) - Tempo Communications 508S Manual Del Usuario

To locate de-energized cable, plug the alligator clip leads into the back of the transmitter
and set transmitter switch to LEADS. There are three options for connection. You can
connect one lead of the transmitter to the sheath and the other lead to earth ground or you
can connect to one conductor and earth ground of a non shielded drop wire. You can also
connect to two conductors of a non-shielded drop wire.
C. Locating & Tracking Buried Wires
To locate buried electrical wires, CATV coax, telephone drops, irrigation control wires or
metallic pipes, attach one alligator clip lead of the 508ST to an independent earth ground
with a grounding stake or screwdriver. Do not connect to common ground such as a metal
water pipe or the pedestal ground as they can cause cancellation of the return signal or
produce false locating signals. The other lead is attached to the cable or metallic pipe in
the following manner:
1. De-energized Electrical Wires: Attach lead to wires.
2. CATV Coax: Attach lead to the shield. The 508S will not disrupt signal.
3. Telephone Drops: Attach lead to sheath. The 508S will not disrupt service.
4. Irrigation Control Wires: Attach lead to common wire or station wire.
5. Gas Pipes with Pilot Wire Attach lead to pilot wire.
6. Metallic Pipes: Attach lead to pipe.
Once the transmitter is attached, turn thumb wheel switch to 3 or 4. Gently swing the
receiver antenna close to the ground and approximately ten to fifteen feet away from the
transmitter location. The tone will be heard on either side of the path with a null (absence
of tone) directly over the path. Proceed along the path following the null. Adjust the
transmitter and receiver controls to achieve greater distances.
D. Measuring Depth
Once the path has been determined, mark the ground at a null point along the path. Hold
the receiver antenna at a 45-degree angle to the ground and move at a right angle away
from the path of the wire until another null is found. Mark this point. The distance between
the two marks is the approximate depth of the wire. (See Fig. 02)
E. Tracking Behind Walls
Hold the receiver in one hand and the antenna in the other. Position the antenna flat along
the wall and at a right angle to the wire, approximately five feet away from the transmitter.
Gently sweep around the subject area until a PEAK signal is found. Follow the PEAK signal
to track the path of the wire. Peak signal will fade as the antenna gets further away from
the path of the wire. Adjust the receiver gain first, then if necessary, the transmitter output
for best results. (See Fig. 03)
F. Locating Circuit Breakers
(Light Commercial & Residential Applications)
To locate the circuit breaker for a specific outlet, the hookup procedure is the same as
outlined in Section 2B.
Proceed to the breaker box and remove the panel so the wires leading into the breakers are
exposed and turn the receiver on (2 or 3 position).
Fig. 03 - Tracking Behind Walls Fig. 04 - Locating Circuit Breakers
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