Instruction/ maintenance manual of the product TW-7700 Fisher
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TW-7700 Operating Manual FISHER RESEARCH LABORATORY Digital Line Tracer.
Description .............................................................................. pg. 3 Transmitter ............................................................................. pg. 4 Receiver .................................................
DESCRIPTION 1 3 The TW-7700 Digital Line Tracer consists of a transmitter, receiver, ground-plate/ground-rod assembly, carrying case (hard or soft), and an operators manual. The TW-7700 is a single frequency line tracer. The TW-7700 is an active locating line tracer.
4 TW-7700 TRANSMITTER Transmitter WARNING: Do not handle output leads unless power is off. ELECTRIC SHOCK HAZARD: Servicing to be performed by qualified personnel only.
5 Receiver Mode This button does not have a function on the TW-7700. (It allows users of the TW-8800 Multi-Frequency Line Tracer to change frequencies.) Power On/Off Turns the receiver on or off. Light Lights up the display for usage in dark areas. When the display is backlit, LIGHT is shown on the bottom left hand side of the display screen.
6 TW-7700 RECEIVER Frequency Modes The frequency at which the receiver is operating. << Left/Over Target>/Right>> Indicates where the receiver is in relation to utility. Numeric Display Serves a dual function: •Relative signal strength of the transmitted signal (% shown).
7 ACCESSORIES The coupling clamp is useful when the utility is exposed, and a direct connection is not possible. It is plugged into the same plug-in socket as the ground-plate/ground-rod assembly. The coupling clamp only operates at the 82 kHz frequency.
Set-up Transmitter either Inductively or Conductively Inductive Be aware of air coupling, the transmitted signal travelling to the Receiver via the air, not the utility. Conductive Connect the ground plate/ground rod assembly to the trans- mitter. Connect the red lead to the non energized utility.
DEPTH ACCURACY Depth measurement is a feature of the TW-7700. Accuracy is defined on an ideal target, that is, one that is continuous, a good conductor, and not surrounding by other utilities. There are factors that can cause the operator to question the accuracy of the utility being traced.
SPECIFICATIONS Subject to improvement or modification without notice. 10 TRANSMITTER RECEIVER Depth Accuracy ...................... +1 inch per foot in nominal condi- tions Readout Units ........................ Inches or cm (factory preset) Left/Right Guidance .
NOTES.
FISHER RESEARCH LABORATORY 200 W. Willmott Rd., Los Banos, CA 93635 Tel 209.826.3292 Fax 209.826.0416 www.fisherlab.com email:info@fisherlab.com EXPORT DEPARTMENT P.O. Box 1896 New Haven, CT 06508 USA Tel 203.288.1638 Fax 203.287.8099 email:mb@exportdept.
An important point after buying a device Fisher TW-7700 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Fisher TW-7700 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Fisher TW-7700 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Fisher TW-7700 you will learn all the available features of the product, as well as information on its operation. The information that you get Fisher TW-7700 will certainly help you make a decision on the purchase.
If you already are a holder of Fisher TW-7700, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Fisher TW-7700.
However, one of the most important roles played by the user manual is to help in solving problems with Fisher TW-7700. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Fisher TW-7700 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
