Am I imagining void detection by the CTX?

[Drjohn71a]

Taking breaks from working around an old foundation today, I had some fun working some of the thousands of gopher hills here on the farm. I kept glimpsing a single digit (sometimes 10-12, but usually 01-07) conductivity reading around the hills. This also happened over the septic tank drain tiles as well as over a few smaller tunnels, around quarter sized cross section, inside the old foundation. These numbers came up in addition to whatever metals were there, and went away as soon as I opened the tunnel tops.

Could the CTX just be reading the hollow area as a low conductor?

 

[Des D]

Yes. That's possible.
I've witnessed that with another ML machine also.

 

[Drjohn71a]

Thanx for the confirmation. I was beginning to think my mind's wandering a bit too far.

 

[laplander]

Those low numbers remind me of hot rocks or klinkers from coal. Try noise canceling in auto then manual till they go away or just ignore or notch out those numbers.

 

[Drjohn71a]

I hadn't thought about that, Lap. Kind of wrapping around due the signal strength? My soil here is very mild. The CTX usually runs at 13-16 auto sensitivity.