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Underground Line Tracer with
Digital Readout, Single Frequency

TW-7700 by Fisher Research


Uses 82 kHz RF plus digital processing to locate underground lines.
Displays depth accurate to 1 inch per foot.

Description

The lightweight, state-of-the-art TW-7700 utilizes advanced digital signal processing for precision locating performance, yet is extremely easy to use. The display is a large and easy to read LCD that gives the user all the necessary information to do the job. A digital keypad allows the user to set the volume level, check the battery level, or activate an LCD backlight. Depth measurement is done at the push of a button.

The transmitter allows the user to locate in either a conductive or inductive mode. A meter and switch make transmitter setup simple and quick.

In the Fisher tradition, the TW-7700 is affordable, tough, and simple to use, while providing maximum performance. A two-year limited warranty comes standard with the unit.

Features
  • Advanced digital signal processing for accurate locating
  • Instant target response
  • Automatic gain control for maximum sensitivity
  • Audio and visual left/right guidance
  • Large easy to read LCD display
  • Push button depth measurement
  • Operates on standard batteries
  • Hard or soft carrying case standard equipment
  • Weather resistant design

TW-7700 Specifications
   
Receiver
  • Depth Accuracy: 
    +/- 1 inch per foot in nominal conditions
  • Readout Units: 
    Inches or cm (factory preset)
  • Left/Right Guidance: 
    Continuous audio tone = Left
    Pulsed audio tone = Right. 
    VCO (varying pitch) output for easy over target location. 
    Visual: Left/Right/Over Target messages
  • Signal Strength: 
    Digital Numeric Readout & Bar Graph
  • Sensitivity Adjust: Automatic
  • LCD backlight: Included
  • Battery Test: 
    Automatic Low Battery alert
    Push button readout
  • Battery Type: Six "C" cells
  • Battery Life: 80 Hours
  • Weight: 5.4 lbs.
  • Operating Temperature: 
    -4°F to +140°F (-20°C to +60°C)
Transmitter
  • Output Frequency: 82 kHz
  • Output Power: 0.5 Watts nominal
  • Battery Test: Yes
  • Battery Type: 
    Two 6 Volt lantern batteries
  • Battery Life: 80 Hours
  • Weight: 5.0 lbs.

Accessories

  • Headphones - Volume adjusts separately for each ear.
  • Coupling Clamp - Useful for in-service and electrical power line tracing when a metal-to-metal hookup is not possible.

2-Year Warranty

Fisher warrants the TW-7700 to be free of defects in materials and workmanship when it is shipped from the factory. The terms of this warranty are fully explained in a warranty registration card that accompanies the instrument. Complete factory and field service facilities support the warranty. Warranty may vary outside the U.S. Please see Corrosion Control Products Company for details.


 

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