Electronics > Beginners
Locating a failed buried wire using a TDR
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TheNewLab:

--- Quote from: CJay on April 02, 2019, 10:03:28 am ---
--- Quote from: Muttley Snickers on April 02, 2019, 09:35:28 am ---A TDR cannot display where a cable fault or junction is located only the distance to it based on certain parameters and as previously mentioned where a cable incorporates junctions or is saturated at multiple points determining the exact location of faults will be a tricky process. Half the battle for these types of jobs is determining the location and direction of the original cable trench and any branch feeds.

--- End quote ---

What Muttley said, it's not likely to be an easy job for a TDR because your cable has failed once already and it's possibly damaged in several places as there's no guarantee it failed in the same place, it's going to be further complicated due to water ingress and mechanical factors, sharp bends, direction changes, even the moisture level in the ground can make a difference to how the TDR 'sees' the cable if the insulation is compromised.

Personally, I think I'd bite the bullet and replace the lot, if I could afford to I'd also run a conduit so the cable can be pulled and replaced with relative ease next time.

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My own typos aside..
wouldn't be easy to just test each witre with a TDR if different locations? if insulated there should not be much crossover.

Mr. Calson's lab built a DIY TDR reflectometer that was accurate within inches...
Muttley Snickers:

--- Quote from: TheNewLab on April 23, 2019, 06:17:27 am ---LOL! DTF--old school touchtone  telephone?

--- End quote ---

DTF - Distance to fault, not to be confused with DTMF - Distance to my fridge.   :)
Brumby:

--- Quote from: Muttley Snickers on April 23, 2019, 01:24:27 pm ---... not to be confused with DTMF - Distance to my fridge.   :)

--- End quote ---

 :palm:


(But I did laugh)
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