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Proper Pinpointing

To properly pinpoint a pipe or conductor using a Pipehorn pipe and cable locator, you want to hear the signal fall off on both sides of the conductor.  You will either get a balanced signal, meaning it falls off evenly on both sides of the strongest signal; or an un-balanced signal, meaning it falls off faster on one side vs. the other (as shown below).  An un-balanced signal usually means you are picking up more than one conductor.

Drawing showing a pipe locator signal peaking when directly over the target and falling off evenly on both sides Drawing showing the pipe locator signal peaking over the intended target yet not falling off evenly on both sides due to an adjacent conductor's interferance

If the receiver is beeping, you need to turn the gain down.  This will allow you to narrow the gap.  You also need to keep the receiver level during pinpointing; do not swing the receiver during pinpointing.

 

When locating on a steep hill or bank, you want to still try to keep the receiver as level as possible, otherwise you will miss your mark as shown below.  Remember that your strongest signal comes from when the sensor is closest to a conductor.  This may not be straight down on a hillside, but off to the side.

Incorrect Correct
Drawing showing receiver staying parallel with the elevated ground while passing over the target, thus causing a mis-locate Drawing showing receiver staying vertical (not parallel) over elevated ground thus peaking properly over the target conductor.

The deeper the conductor is, the worse this problem becomes.

Table of Contents

 

Pipe and Cable Locator Tips

  1. Setting up the transmitter for Inductive Locating

  2. Setting up the transmitter for Conductive Locating

  3. Avoiding Bleed-over

  4. Proper Pinpointing

  5. Isolating lines and Nulling out adjacent conductors

  6. Performing a Sweep of an area

  7. Download the Quick Guide!

 

Ferromagnetic Locator Tips

  1. Searching Near a Fence or Metal Building

  2. Pinpointing and Tracing Objects

  3. Proper Sensitivity Setting

  4. Locating Cast Iron Pipe Joints

 

Copyright © 2009 Utility Tool Company, Inc.

Last modified: 09/18/2009

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