"Lynn Coffelt" bravely wrote to "All" (07 Dec 05 00:24:56)
--- on the heady topic of " Ground resistance tester"

LC From: "Lynn Coffelt"
LC Xref: core-easynews rec.radio.amateur.homebrew:89630
[,,,]
LC The
LC instrument the civil engineers used to make the measurements was hand
LC cranked, something like the "Megger" used for insulation break-down
LC testing. I cannot say whether it was a regular "megger" or a
LC specialized instrument. Anyhow, we mechanics tried to do our own
LC testing with an ordinary VOM and found the task quite vexing. One
LC problem was that stray currents in the ground drove the ohmmeter crazy,
LC and as if that wasn't enough, the ohmmeter probes current caused an
LC electrolytic (?) reaction, sort of like trying to measure the
LC resistance of a battery using a standard VOM. Now I'm going to
LC back up and read some of the references provided by previous
LC responders. Old Chief Lynn, W7LTQ (I still like Furuno, Roy!)

Speaking of electrolytic reactions....
I would try a tool from the tv service industry called an ESR meter.
It measures the internal resistance of electrolytic capacitors by
using an ac signal of moderate frequency around 100K Hz. They can
typically measure from 0.09 ohms to 199 ohms.

A*s*i*m*o*v

.... Useless Invention: Flashbulb tester.