Equivalent number values for ACE discrimination notches?

[jamiefind]

A lot of the higher end detectors tell you a number associated with your found target, but my Garrett ACE 350 just shows me a notch for the target (four different notches for iron, one for nickels, etc.). I'm an engineer by trade and would like to understand the technicalities of my machine better. Do these notches correspond with the number values shown on higher end machines? For example, does a target registering at number 72 equate to a particular notch on my machine? Any wisdom or education would be appreciated.

 

[Chris R]

1-35 Iron
35-60 foil,nickel, pull tab, gold
60-80 zincoln, penny, dime, small silver
80-100 quarter, big silver, and beer cans.
That is from my At pro if I remember correctly. I don't have it anymore.

Sent from my 710C using Tapatalk

 

[BigWaveDave]

Chris R has it about right...

Also, use the owners manual, youtube vids, and practice....

A test garden with a variety of targets will help you learn the 350 also... good luck

 

[Anduril]

When I was researching a new purchase, I screen-scraped this off of a YouTube video.
(Sorry, can't recall which one.)

I ended up getting a Garrett GTI-2500, so didn't really need this info.
I think this might be for an AT-Pro? Someone here will know.

 

[RobRieman]

When I was researching a new purchase, I screen-scraped this off of a YouTube video.
(Sorry, can't recall which one.)

I ended up getting a Garrett GTI-2500, so didn't really need this info.
I think this might be for an AT-Pro? Someone here will know.

View attachment 1221369

Minelab E-trac/3030

 

[Tom_in_CA]

The scales on different manufacturer's machines might be #'d/calibrated differently . Ie.: on the old whites, it was 0 to 95 (conductive). On minelab it might be to 43. And so forth. On some machines, the increments are broken down into very minute categories. On others (like your 350, and the CZ6, etc...) they are broken down into broad group/lump categories. There *can* be some occasions where the more refined increments come in handy. Like to tell commonly recurring type bullet shells in a certain location, from an IH, and so forth.

 

[jamiefind]

Thanks. So it sounds like I could just look up the meter number guides for the most common MDs and get an *idea* of where my Ace 350 notches fall within those numbers. Obviously the Garret engineers have designed the Ace 350 notches with individual upper and lower limits, and one of those designers could calculate (or just know) what meter numbers correspond with those upper and lower limits for each notch (except that it's probably proprietary). The impetus for my question is that when I read a post about someone hitting a target that "reads X#," I would enjoy knowing in my head which of my Ace 350 notches encompasses that X#.

It's possible that the Ace 350 hardware is cheaper and not as consistent/sensitive/whatever as to reliably assign meter numbers to those notches, I suppose?

 

[Tom_in_CA]

..... whatever as to reliably assign meter numbers to those notches, I suppose?

Your best bet, to totally understand this TID # concept, is to go find an old used Whites Eagle (or XLT, or spectrum, etc...), and play around with 100 household items. Ie.: foil wads, different sized tabs, coins , rings, nuts, bolts, etc...... Pay special attention to the odd-ball bounces , such that you get the eventual "average" of the bounces. Now do the same test with an Ace 350 or CZ6: You'll see that they find exact categories much more easily. Oh sure, a few will "bounce" when right on the "edge" of one category vs another (depending on your swing centering, speed, etc...). But the only thing that that the easier assignment of TID is offering, is simply to lump an entire 10 (or whatever) #'s into a single category.

This can have pro's and con's. Ease of use, sure! But when it comes time to make minute decisions, you've got broad categories "lumped".

 

[jamiefind]

Wise advice, Tom. And then there's this: http://www.detectorprospector.com/forum/topic/316-metal-detectors-with-reliable-target-id-numbers/

I'm stubborn, so I did some comparing and scratched out this guide. Rough extrapolated Garrett Target ID #s for each Garrett Ace 350 notch #:
Notch 1 = TID 1-12 (100% iron)
Notch 2 = TID 13-24 (100% iron)
Notch 3 = TID 25-36 (100->70% iron)
Notch 4 = TID 37-42 (65->40% iron, foil, 0->8% rings/gold)
Notch 5 = TID 43-48 (35->10% iron, foil, 15->54% rings/gold)
Notch 6 = TID 49-54 (5->0% iron, foil, 5¢, 62-100% rings/gold)
Notch 7 = TID 55-62 (5¢, pull tab)
Notch 8 = TID 63-71 (pull tab)
Notch 9 = TID 72-75 (1¢, 0->57% silver)
Notch 10 = TID 76-79 (1¢, 71-100% silver)
Notch 11 = TID 80-89 (10¢, 25¢)
Notch 12 = 90-99 (25¢, 50¢, $1)

 

[jamiefind]

In case anyone refers to this thread in the future, I further refined the guide based on this thread: http://metaldetectingforum.com/group.php?do=discuss&group=&discussionid=699

Rough extrapolated Garrett Target ID #s for each Garrett Ace 350 notch #:
Notch 1 = TID 1-12 (100% iron)
Notch 2 = TID 13-24 (100% iron)
Notch 3 = TID 25-36 (100->70% iron), foil
Notch 4 = TID 37-42 (65->40% iron, foil, 0->8% rings/gold)
Notch 5 = TID 43-48 (35->10% iron, foil, 15->54% rings/gold)
Notch 6 = TID 49-54 (5->0% iron, foil, 5¢, 62-100% rings/gold)
Notch 7 = TID 55-62 (Indian head 1¢, pull tab, 100% rings/gold)
Notch 8 = TID 63-71 (pull tab, bottle cap, mini-ball, 100% rings/gold)
Notch 9 = TID 72-75 (1¢, bottle cap, 100->77% rings/gold, 0->57% silver)
Notch 10 = TID 76-79 (1¢, 69->46% rings/gold, 71-100% silver)
Notch 11 = TID 80-89 (10¢, 25¢, 38->0% rings/gold)
Notch 12 = 90-99 (25¢, 50¢, $1)

 

[ivan salis]

on my delta 4000 -- with its 0 to 99 numbers display set up --- 58 was nickel or 10 k gold ---64 was 14k and 67 was 18k --- 77 was a zinc cent or indain cent -- 82 was the older copper cents pre 82 and clad or silver dimes --84 to 87 was quarters --halves were in the 90's as was big silver dollars -- the bulk of "normal" pulltabs were a "60" ..

with only 4 large "blocks" to sort out stuff into -- your going to be a "mega digger" --unless your a "tones" type of person to help fine sorting your finds...