Product Manual

4
RECEIVER
1. Carrying Strap: Keeps one hand free for marking
ground or pavement while using Tracer Probe.
2. Meter: Indicates signal strength up to a point
from metallic conductors while locating or tracing.
Meter also gives a visual indication of battery
strength.
3. Accessory Input: Use this jack to plug in all
accessories except the headphones.
4. Sensitivity:
A. Toggle switch to select NORMAL or HIGH
range.
B. Knob to control sensitivity level within the
NORMAL or HIGH range.
5. Ni-Cad Recharge: When using Ni-Cad
rechargeable batteries, plug the charger jack
into this receptacle. If red light is on, connection is
made. (NOT available in Europe)
6. Depth Level: This bubble indicates the angle of
the receiver to the ground. Use it to keep Receiver
and Transmitter level during Inductive Locating
and for making the 45-degree angle necessary in
depth determination.
7. Headphones: Use this jack to plug in
headphones only. It automatically silences
speaker. Use in particularly noisy areas.
8. Battery Test: Press this black button and observe
battery strength on meter. If meter reads below
10
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To develop your operator technique, practice with known
pipes and cables to thoroughly familiarize you with your TW-6.
Of particular importance in this regard is the SENSITIVITY knob.
Learning to vary the SENSITIVITY knob and studying the effects of
those variations remains the key to getting the most precision out
of the instrument. These practice sessions will not only allow you to
get used to how the TW-6 responds to different kinds of pipes and
cables, but it will also teach you how to interpret each reading.
When using the TW-6 on the handle in the presence of CONDUCTIVE
SOIL (those with high mineral salt content and usually rather
damp), it may be necessary to turn down the SENSITIVITY control
from the suggested position. With each repeated reduction, the
operator should readjust the front knob as given in the “How To
Tune” instructions.
When locating near-surface and/or very large pipes, you can
sharply decrease the width of indication by tuning the SENSITIVITY
control down or counter-clockwise. This narrowing of the indication
will allow more accurate pinpointing.
The TW-6 has a slightly slower response than earlier models. This is
more noticeable at extended tracing ranges. Be sure that when
you “wag” either the receiver or the Tracer Probe, you do so
slowly enough for the receiver to sense the signal emitted by the
underground pipe or cable.
If the signal remains reasonably strong as you are tracing out a
pipe or cable and it mysteriously disappears, use the “null method
“of locating with the receiver instead of the “signal method”.
Sometimes at extended ranges in HIGH power, the “null-method”
will give you greater tracing distance, however, usually the signal
method will give a longer trace.
OPERATING HINTS