I have an original GMH and have a GMH III coming soon and have a question regarding the ground balance in disc. mode. Now, I've read a number of posts claiming that the GB is a preset in disc. Well, reading through the manual, I came across a statement that seems to contradict this. Here it is: " Even though the Motion All
Metal mode automatically adjusts ground balance, we suggest the Motion Beach Mode be
selected to reduce any response the wet, salted sands." Also, there's a posting from a while back that seems to confirm this http://www.findmall.com/read.php?32,798610,800994#msg-800994 . Here's part of the posting: "Observation 3 The Garrett CXII has auto GB in Disc mode, this will cause your CXII air test reading to be less than stellar.. If you turned the loop to a target free ground, then measured the distance above the coil, that might be a better measurement. Still in ground performance is what we are looking for, and in ground target comparison is the best way to compare two different detectors, or depth capability of a (single) detector.
Now, the long of it
Some brands of detectors will air test very well, while others do not. The electrical interference encountered will vary from place to place and will affect air testing results. Air testing is a handy benchmarking technique to get a general idea of performance, but in ground performance is where it really matters. If air testing a detector and you don't get more than 4 or 5 inches on a penny, then there is probably something wrong, or not setup right.
Detectors that have Auto ground balance (not the same as pre-set or manual) will track off to the air environment the coil is exposed to, and this will cause those machines to not appear to get good results." Looking at the online owners manual, the CXII has auto ground tracking in the Disc mode.
What do you guys think? I'm also wondering if the original GMH tracks the ground too. ..Willy.
Metal mode automatically adjusts ground balance, we suggest the Motion Beach Mode be
selected to reduce any response the wet, salted sands." Also, there's a posting from a while back that seems to confirm this http://www.findmall.com/read.php?32,798610,800994#msg-800994 . Here's part of the posting: "Observation 3 The Garrett CXII has auto GB in Disc mode, this will cause your CXII air test reading to be less than stellar.. If you turned the loop to a target free ground, then measured the distance above the coil, that might be a better measurement. Still in ground performance is what we are looking for, and in ground target comparison is the best way to compare two different detectors, or depth capability of a (single) detector.
Now, the long of it
Some brands of detectors will air test very well, while others do not. The electrical interference encountered will vary from place to place and will affect air testing results. Air testing is a handy benchmarking technique to get a general idea of performance, but in ground performance is where it really matters. If air testing a detector and you don't get more than 4 or 5 inches on a penny, then there is probably something wrong, or not setup right.
Detectors that have Auto ground balance (not the same as pre-set or manual) will track off to the air environment the coil is exposed to, and this will cause those machines to not appear to get good results." Looking at the online owners manual, the CXII has auto ground tracking in the Disc mode.
What do you guys think? I'm also wondering if the original GMH tracks the ground too. ..Willy.
