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Summary of Contents for Fisher Research Labs TW82P
- Page 1 TW-82 DIGITAL LINE TRACER WITH PASSIVE POWER DETECTION Operating Manual Revision Level 0 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 2: Table Of Contents
CONTENTS Introduction ............... 3 Contents ................4 Transmitter ..............5-7 Inductive Locating .............7 Conductive Locating ..........7 Receiver ................. 8-17 Control Panel ...............8 Standard Mode ............9-11 Lateral Mode ............12-14 Lateral Tracing Operation ....... 13 Lateral Mode Programming ......13 Passive Power Mode ..........14-16 Auto Power-Down Receiver ........ -
Page 3: Introduction
INTRODUCTION The TW-82P Digital Line Tracer components include a Transmitter, Receiver and Ground-Rod Assembly. The TW-82P is an active single-frequency and passive power current line tracer that is used to locate and trace buried utilities using any of the following four tracing methods: 1. -
Page 4: Contents
CONTENTS Carrying Case Ground-Rod Assembly (Ground-Rod & Conductive Tracing Cables) Receiver Transmitter 6 D-cell Batteries Operator’s Manual Calibration Certificate GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... -
Page 5: Transmitter
TW-82 TRANSMITTER TW-82P Transmitter The Transmitter has two controls: & button has a dual function: 1. When the Transmitter is powered on, switches the device between normal (1/4 watt) and high (1.0 watt) output. 2. With the Transmitter powered off: to program the Auto A. - Page 6 TW-82P TRANSMITTER Low Battery Power-Down Warning When the Transmitter batteries are near the end of their useful life, the Transmitter will warn the operator before shutting down. Five minutes before shutting down, the Transmitter will alternately stop and start transmitting at approximately one- second intervals.
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Page 7: Inductive Locating
TW-82P TRANSMITTER INDUCTIVE LOCATING Inductive locating is most effective with the Transmitter straddling the utility as illustrated, with the utility perpendicular to the Transmitter’s batteries. If the utility direction is unknown, place Transmitter on the ground, power on, and sweep the Receiver a complete 360º... -
Page 8: Receiver
TW-82 RECEIVER TW-82P Receiver CONTROL PANEL 1. Press-and-Hold to turn ON. 2. Press-and-Hold to turn OFF. 3. Choose Metric/Imperial unit of measure (see instruction p17). Press to select volume settings • In Standard and Lateral Modes, tap the button to adjust volume: 1. -
Page 9: Standard Mode
TW-82P RECEIVER STANDARD MODE In this default configuration, the TW82P Receiver requires no operator intervention to trace a line under most circumstances. Only the volume can be adjusted in this mode. The following values & conditions are displayed on the LCD display... - Page 10 TW-82P RECEIVER STANDARD MODE continued Audio: When you move within a 45º angle of the center of the electromagnetic field, the audio pitch will change; the pitch increases as you approach the utility. Outside the 45º zone, the pitch does not change. When the Receiver is directly over the utility, it goes silent.
- Page 11 TW-82P RECEIVER STANDARD MODE continued 5.Depth: The depth reading is only accurate if the electromagnetic field is perfectly round. current The electromagnetic field must have enough energy for the Receiver to accurately calculate the depth. The weaker the signal strength, the less reliable the depth indicator. For this reason, depth readings for inductively located utilities will tend to be less accurate than conductively located ones.
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Page 12: Lateral Mode
TW-82P RECEIVER LATERAL MODE At some sites, utility lines branching off from a main line may be difficult to trace using the Standard Mode. In these circumstances, use the Lateral Mode. At such sites, the signal from a main line is so strong that it overwhelms the single from a lateral line. -
Page 13: Lateral Tracing Operation
TW-82P RECEIVER LATERAL MODE continued Press to enter Lateral Mode. will appear on the LCD display. LATERAL TRACING OPERATION While tracing a line using the Lateral Mode, the display will appear as illustrated below. The SIGNAL number indicates the strength of the field emitted by the buried line. -
Page 14: Passive Power Mode
TW-82P RECEIVER PASSIVE POWER MODE While the Standard and Lateral Modes use the 82kHz signal injected by the Transmitter, in some cases it is desirable to locate buried utilities by tracing electric power currents running through them. Buried utilities may be energized by the electric power currents running directly through them, current coupling into them as a result of leakage from power cable faults, defective electrical loads that leak AC power into ground connections or from cathodic protection on... - Page 15 TW-82P RECEIVER PASSIVE POWER MODE continued Operating Controls Press to enter Passive Power Mode The display will appear as illustrated to the right. Press to increase gain. Press to decrease gain. Press again to exit Passive Power Mode. Locating Procedure 1.
- Page 16 TW-82P RECEIVER PASSIVE POWER MODE continued Grid Search: To ensure complete coverage of the area, map out a grid of intersecting lines covering the search area. Walk the grid at intersecting right-angles. Power lines will be detected when the blade of the Receiver is perpendicular to the utility.
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Page 17: Auto Power-Down Receiver
TW-82P RECEIVER AUTO POWER-DOWN, RECEIVER When 90 minutes have passed without the operator pressing any control buttons, the Receiver will automatically power down. • Lower left of the display will indicate “OFF”. • Lower right of the display will count down from 10 to 0. •... -
Page 18: Specifications
SPECIFICATIONS RECEIVER Frequency ........82.175 kHz Standard Mode ......Automatic response Lateral Mode ........ Programmable Left/Right Guidance ..... Audible and visual Azimuth Indicator ......Visual Over-Target Indicator ....Visual and audible Battery Status ......Visual Signal Strength Indicator .... Numeric display & audible Signal Current Measurement .. -
Page 19: Warranty
Q U A L I T Y Fisher detectors are renowned for their quality. Each detector is handcrafted in the USA with pride. P E R F O R M A N C E The worldwide underground utility industry relies on Fisher. Our instruments are durable, dependable and locate deeper. -
Page 20: Accessories
TW-82 ACCESSORIES 3-Inch Coupling Clamp – CCLAMP-3 Useful for in-service and electrical power line tracing when a metal-to-metal hookup is not possible 5-Inch Coupling Clamp – CCLAMP-5 Useful for in-service and electrical power line tracing when a metal-to-metal hookup is not possible Hard Carry Case –...
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