Chase Goldman Posted December 31, 2023 Share Posted December 31, 2023 2 hours ago, HardPack said: I would suspect in higher mineralized soil types sensitivity adjustments would have a proportional impact on detection depth… It's not proportional. The sensitivity to depth relationship is non-linear. It plateaus (i.e., the steepness of the curve significantly decreases) at sensitivity levels above 22 or so in my experience. 1 Link to comment Share on other sites More sharing options...
Digalicious Posted December 31, 2023 Share Posted December 31, 2023 35 minutes ago, Chase Goldman said: It's not proportional. The sensitivity to depth relationship is non-linear. It plateaus (i.e., the steepness of the curve significantly decreases) at sensitivity levels above 22 or so in my experience. I found a post I made from about 1 year ago, showing a depth / sensitivity test on the Legend. The results were also nonlinear. For the sensitivity test, I used the 6” coil, a silver dime, M3, and the default of 5 for the recovery speed. Note the 1" difference from 24 to the maximum of 30, yet there is a 3" difference from 16 to 24. 30-10” 29-9.5” 28-9.5” 27-9.5” 26-9” 25-9” 24-9” 23-8.5” 22-8” 21-7.5” 20-7” 19-7” 18-6.5” 17=6.5” 16-6” 2 Link to comment Share on other sites More sharing options...
HardPack Posted December 31, 2023 Share Posted December 31, 2023 44 minutes ago, Chase Goldman said: It's not proportional. The sensitivity to depth relationship is non-linear. It plateaus (i.e., the steepness of the curve significantly decreases) at sensitivity levels above 22 or so in my experience. 4 minutes ago, Digalicious said: I found a post I made from about 1 year ago, showing a depth / sensitivity test on the Legend. The results were also nonlinear. My bad. Good information to know about both detectors. For a stable clean signal it appears in this dirt 8 inches is close to the depth detection limit with the 11 inch coil at sensitivity 18. Bumping up to a higher setting increases background noise but workable; at 8 inches the weak signals increase as does the TID spread on shallower targets (dime/penny). Getting closer to breaking through the iron curtain. The bedrock isn’t far enough down to worry about the maximums. 2 Link to comment Share on other sites More sharing options...
mcole Posted January 6 Share Posted January 6 Still following. Still have not worked on this. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now