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Thread: locate by phone

  1. #1
    Senior Member 1idejim's Avatar
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    Default locate by phone

    yesterday i located an irrigation valve that has been out of order and MIA for over a year in the state of washington, from home in california. I AM NOT A WITCH put the wood and fire away.

    a friend of mine lives on bainbridge island and has a irrigation maintainence company, i loaned him a locator because he wasn't trusting his and walked him through the locate by phone.......sucessfully btw.

    in the course of the locate we isolated several common wires and i had him take resistance tests on those wires. here's the gig

    all tests were earth ground / single wire tests. black lead/earth - red lead/common wire

    4 wires connected in box, 1 in 3 out. 1 wire tested .005 and that wire led to the valve, the other wires both tested 0 with continuity tone and are buried in the ground elsewere on the site, we did not chase them.

    my question is how can i be getting continuity by touching an earth ground (screwdriver and a single wire on 1 end? i locate faults but i have never see this happen before.
    Last edited by 1idejim; March 23rd, 2010 at 09:50 PM.
    You Can't Fix It Till You Find It - Jim 3:23

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    Senior Member yahoo's Avatar
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    Default Re: locate by phone

    there are some guys on this forum that will have a good answer to that good question but i am not one of them.....good luck on getting an answer!
    wise men talk because they have something to say and fools because they have to say something....plato

  3. #3
    Senior Member 1idejim's Avatar
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    Default Re: locate by phone

    come on, somebody answer this riddle.

    we know what we're reading, just want to know why?

    i 've posted this thread in the electricians, locators and the irrigation forum, no answers yet
    You Can't Fix It Till You Find It - Jim 3:23

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    Moderator Goldenboy's Avatar
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    Default Re: locate by phone

    Is the question why you get continuity on your locator when hooked up to a wire that is isolated and not bonded on the other end? If so that just depends on the frequency you are using. If you use a low frequency you will not get continuity if the opposite end you are hooked up to is not grounded. Now if you use a high frequency it just pushes the signal down the line even without the other end grounded. Kind of like a false continuity.

  5. #5
    Mke
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    Senior Member Mke's Avatar
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    Default Re: locate by phone

    Yeah, this sounds horrible, but i'm not quite sure exactly what you are describing......maybe its too close to friday for me.

  6. #6
    Senior Member 1idejim's Avatar
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    Default Re: locate by phone

    i'm testing the resistance of a single wire with a multimeter and receiving continuity...........
    You Can't Fix It Till You Find It - Jim 3:23

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