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Thread: Ground Resitivity Meters

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  1. #1

    Jun 2003
    North Georgia USA
    18
    1 times

    Ground Resitivity Meters

    I have recently built a ground resistivity meter and am in the initial testing stages. I would love to share experiences with any others here who have worked with similar devices (Accumeter, etc). My next project is a fluxgate magnetometer.

    WoodyGA

  2. #2
    Anonymous

    Ground Resitivity Meters

    I hven't worked with this type of equip. but would be interested in hearing how your progress is going. Keep us updated!

    Deacon

  3. #3
    leafmould

    Ground Resitivity Meters

    i have a friend who would love to build a resistivity meter as we,d really like one but are skint (uk for broke) he's a electrical engineer so it would be no problem but where to find the schematics?

    phil

  4. #4

    Jun 2003
    North Georgia USA
    18
    1 times

    Ground Resitivity Meters

    Carl Moreland has a couple plans at http://www.thunting.com/cgi-bin/geot...e=projects.dat and the one I built is in this magazine: http://www.epemag.com April and May Issue of this year. Can build for a lot less than you can buy.
    Avago likes this.

  5. #5

    Jul 2003
    26
    1 times

    Ground Resitivity Meters

    Woody, any chance you may be able to e-mail me or post what is in the portion of the plans (Part II)? I picked up part I from my news stand and ordered the pc board but when I went to get the second edition (part II) they were all sold out and would not be getting any more. It would be greatly appreciated. By the way I did build the flux gate mag on carl site and it works great. The hardest part is to align the sensors. Also I attached an electrnoic volt meter to the sensor pins which allows me to see any small increases in voltage which would indicate a target. This used with the audio fucntion that it comes with and the optional led that I installed makes for great features. If you need help let me know. Thanks again.

  6. #6

    Jun 2003
    North Georgia USA
    18
    1 times

    Ground Resitivity Meters

    You can get the May issue with part 2 online for $5 at www.epemag.com
    They let you download the PDF version of the mag after purchase.

    My friend has built the mag as well and has not been able to align the sensors at all ... can you offer any advice on alignment and the volt meter and led you added to the plans?

    Thanks

  7. #7
    leafmould

    testing?

    hi woody
    got the mag, thanks, my friend is now checking and looking to get the stuff together. hows your testing going? is it an ok option?
    cheers, phil

  8. #8

    Jun 2003
    North Georgia USA
    18
    1 times

    Ground Resitivity Meters

    Phil,

    Seems to work fine, lots to learn about various probe patterns and spacings though, recommend you get the book "Seeing Beneath the Soil" mentioned in the article. Lot more detail on survey methods in there.

    Woody

  9. #9
    dwight traina

    proton mag

    Hay guys i dont know if thi will help are no but here gose. i read about this in yhe 1950s they called it a protron mag it was made in germany to be used for archaeologywhat they showed was a prob that had a glass container on top of it with a winding in it coming of of it was 2 leads that went to a metal box that had a meater and 5 knobs on it the way it worked was yoy laid out a grid say 50 or 100 foot squar one person worked the prob the other person worked the box.the knobs could be set for different depth the mech give you a read out being the earth is in layers the mech would show any thing that chang the layer like a large rock a wall are a pot of money the man at the grid work at a right angel to the north poll, all so the glass container had destilled water in it They said the universty of wess. and calif had one. happy hunting

  10. #10
    RRey199

    Ground Resitivity Meters

    Is that like the flux capacitor in the Dr. Brown's Delorean or is it more like the reflex float valve in the General Lee?

    I have truly been educated. TH hi-tech. Makes me wish I was psychic.

  11. #11

    Mar 2004
    3

    Ground Resitivity Meters

    I'm thinking about building one too. But, in addition, I will add 2 more volt meters, one on each set of probes going into the ground. An electronics law says that the sum of all voltages = the source voltage. You will be able to tell at a glance what you are dealing with.

    probe probe probe probe
    | | | |
    | | | |
    . ---VM1--------.------VM2-----.------VM3------.
    (Existing)

    VM1 + VM2 +VM3 = Batt. voltage.

  12. #12

    Mar 2004
    3

    Ground Resitivity Meters

    Oops. That didn't tuen out the way I typed it in. I hope you get the idea.

  13. #13
    Charles,Oak Island

    Re: Ground Resitivity Meters

    Woody, if we could just figure out some way to pull it behind a boat for weck hunting.............

  14. #14

    Dec 2004
    1,382
    53 times

    Re: Ground Resitivity Meters

    they will not work in sand. will give false readings in overly moist soil and if used around a lot of quartz. otherwise i have no complaints with mine. will find tunnels, caves, covered over not filled in wells with ease. finding your target is a little tricky and will take practice.

  15. #15
    us
    Nov 2013
    TN
    Minelab Safari .......... Minelab Excalibur II ....... ........Minelab CTX 3030
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    Metal Detecting
    Beyond me why anyone would want to watch that freakshow.
    "Those who cannot compete intellectually tend to develop a cultural aversion to the whole idea." -- Fred Reed
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