[TowerTalk] [Bulk] Re: copper or galvanized ground rods in red SC clay

[Roger D Johnson]

  This type of meter is designed to measure the resistance of grounds at power
line frequencies. Unfortunately, lightning is an RF phenomenon with energy up
into the Mhz range. At these frequencies, the inductance of the ground system
is more important than the resistance. Relying on this type of meter to construct
a lightning ground is not recommended.

73, Roger


On 1/9/2016 5:11 PM, Grant Saviers wrote:
>
> I bought a Duoyi DY1000A Ground Resistance Tester, cost about half of what I 
> could rent one for and 1/10 of what Greenlee wants. It seems to be very 
> repeatable and comes with a cal loop.  For $10 more this model does more
> http://www.ebay.com/itm/DUOYI-Leakage-Current-And-Grounding-Resistance-Clamp-on-Earth-Tester-DY1200-/321969345083?hash=item4af6de523b:g:I3MAAOxy69JTDW~A 
>
>
> One thing in laying out rods is to have the wires in a radial (star) 
> connection to the tower, no loops or cross connections.  Then each rod or 
> string of rods can be measured (actually it is a little more complicated than 
> that, it's explained in the manual).
>
> Grant KZ1W
>
>
>