background image

TW-8800

Operating Manual

Multi-Frequency Digital Line Tracer

F I S H E R     R E S E A R C H     L A B O R A T O R Y

Q U A L I T Y

Fisher detectors are renowned for their quality. 

Each detector is hand crafted in the USA with pride

P E R F O R M A N C E

The worldwide underground utility industry relys on Fisher.

Our instruments are durable, dependable, and locate deeper.

R E P U T A T I O N

Fisher produced the first patented metal detector in 1931. For 

over 70 years, the Fisher logo has been a mark of excellence.

2 - YEAR LIMITED WARRANTY

Fisher believes in the products we produce and backs this belief 

with a 2 year limited warranty. 

Proof of purchase is required to make a claim under this warranty.

 

NOTE TO CUSTOMERS OUTSIDE THE U.S.A.

This warranty may vary in other countries, check with your distributor for details.

Factory warranty follows the channel of distribution.

Warranty does not cover shipping costs.

According to FCC part 15.21 Changes or Modifications made to this device 

not expressly approved by the party responsible for compliance could void 

the users authority to operate this equipment.

S E R V I C E

Fisher is committed to providing you, our valued customer, with 

superior service. Each and every instrument is rigidly tested 

and carefully inspected during assembly and before shipment. 

Should you have any questions or problems, contact:

FISHER RESEARCH LABORATORY

1465-H Henry Brennan,

El Paso, Texas 79936

Tel 915.225.0333   Fax 915.225.0336

www.fisherlab.com   email:[email protected]

 8708001 

              04-08-10

Содержание TW-8800

Страница 1: ...red to make a claim under this warranty NOTE TO CUSTOMERS OUTSIDE THE U S A This warranty may vary in other countries check with your distributor for details Factory warranty follows the channel of distribution Warranty does not cover shipping costs According to FCC part 15 21 Changes or Modifications made to this device not expressly approved by the party responsible for compliance could void the...

Страница 2: ...ption pg 3 Transmitter pg 5 Receiver pg 6 Accessories pg 8 Operating Instructions pg 9 Depth Accuracy pg 12 Specifications pg 13 Using Headphones pg 14 Treasure Hunter Code of Ethics pg 14 CONTENTS NOTES 2 15 ...

Страница 3: ...ry The coupling clamp is used when the utility is exposed but a direct connection is not available The clamp jaws are opened and placed around the utility The clamp never makes a direct connection with the utility that is the utility can move freely with the clamp around it This method can only be used at the 82 kHz frequency 14 Laws governing the use of metal detectors are common in some areas In...

Страница 4: ...ice 13 Depth Accuracy 1 inch per foot in nominal conditions Readout Units Inches or cm factory preset Left Right Guidance Audio continuous tone Left pulsed tone Right VCO varying pitch output for easy over target location Visual Left Right Over Target messages Signal Strength Digital Numeric Readout 0 99 Bar Graph Sensitivity Adjust Automatic LCD Backlight Included Battery Test Automatic Low Batte...

Страница 5: ...f the TW 8800 Accuracy is defined on an ideal target that is one that is continuous a good conductor and not surrounded by other utilities There are several factors that can cause the operator to question the accuracy of the utility being traced Inductive Transmitter Setup Inductively only a small portion of the signal attaches it self to the utility With a weakened signal trace should be accurate...

Страница 6: ...ground press and hold this pad to get the depth to the center of the target TW 8800 RECEIVER The receiver includes the control keys and a large display screen Controls Tracing After locating the point s where the signal strength was the highest return to that spot and start tracing your utility This is where the LEFT RIGHT indicator is very helpful Swing the Receiver from left to right and listen ...

Страница 7: ...Hz This frequency is mainly used on grounded wires or cables It can give the longest trace distance of the three active modes In the passive mode set up a defined search pattern The pattern should include both north south and east movement Even though a signal may be encountered be sure to scan the entire area In the active mode setup the transmitter either induc tively or conductively Inductive B...

Страница 8: ...ength in half at each junction 9 OPERATING INSTRUCTIONS The following instructions are designed for safe and effective methods of line tracing and utility avoidance Some of the steps may not be applicable in all situations The underlying guideline is that operator safety must be maintained at all times Use of safety equipment extra personnel and up to date as built plans should be considered when ...

Отзывы: