Clamp on Ground Testers [RE-wrenches]

[Darryl Thayer]

Hi Ray
I have used the "fall of potentical" meters which
measure something about the soil and the ground rod,
but this always seemed like black magic.  

I have seen the clamp on meter used, I did not note
the brand, Ideal I think.  Remember the clamp on
requires two grounds, that is two ground rods, or a
ground rod and a water main.  And if you only have two
grounds you do not know which is the weakest link.  

PS I have wanted one for a long time also. 
Darryl 

--- Ray Walters <walters at taosnet.com> wrote:

> 
> Hi All;
> 
> Has anybody tried the clamp on ground resistance
> testers like the 
> Amprobe DGC-1000A or FLuke GEO 30? I've been wanting
> to accurately 
> measure ground impedance for a long time, but most
> of the equipment not 
> only was expensive, it required interrupting the
> grounding system to 
> measure it. These new clamp ons supposedly clamp on
> right over the rod 
> without disconnecting anything, and in a few seconds
> you have an 
> impedance to ground measurement. (its actually in
> the article 250, but I 
> never saw anybody actually measure it)
> I'm just comparing features and price, and hoping
> for some of your good 
> old real world feed back, before I make an expensive
> mistake.
> 
> Thanks in advance,
> 
> R. Ray Walters
> 
> 
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