Ace 250 mystery

[nealcat]

I just recently purchased an Ace 250. It's been too cold to try it out, so I thought I would air test it. It did great, beating out my BH Time Ranger and equaling out my Tesoro Conquistador but not my GTI 1500(hard to beat a GTI). At max sensitivity it detected a dime @ 7". Even the sniper coil detected it @ 5.5". But here is the mystery. Out in my backyard I have some coins buried. One being a dime @ 5". All of the detectors will detect it except the Ace. The ACE will pinpoint it though. I have it marked with a golf tee so I know where it is. I have heard the Ace 250 will detect deeper than it will pinpoint! Any explanations? other than operator error Oh, and it will detect the other coins buried at 3 and 4 inches. The coins are just plain ole American coinage, buried about 8 months. And as for as pinpointing, it seems to be dead in the center of the coil.

 

[NM5K]

Dunno... Kinda weird it will pinpoint, but not ID..
Must be a quiver in the force.. Have you tried from
different directions?
Your air tests match mine pretty close, so the machine
sounds normal. Curious.. Does the sniper coil sniff
the buried dime? It should if it's pinpointing. The only
thing else I could think of, is maybe the coin has shifted
in the hole for some reason, and is on it's side..
Or maybe a case of "fresh hole syndrome"...
But...The other machines are getting it..
The pinpoint is under the inner coil. If the coin
is centered under the inner coil, you will be at the
widest pinpoint tone, and max strength. But the usual
method to actually pinpoint is to center the object,
and then pull the coil back until the tone drops out.
This then places the object just in front of the inner
coil. More accurate than trying to pinpoint it using
the middle of the coil, as thats the widest point of the
coil. BTW, as you draw back, keep making sure the target
is centered. As you draw back, the pinpoint area will
shrink in size from side to side, as it follows the shape
of the coil.
To be the most accurate, it's important to keep centering
from side to side, to make sure you are centered. If you
don't, it's possible to be off to the side a bit when
the tone drops out.
The thing about the pinpoint being weaker than the ID mode
I think mainly applied to the first 250's that came out.
I don't think the ones out now really have that problem.
I think mine pinpoints just as far as the ID mode.
Maybe farther..
One other thought.. Maybe your swing speed was kinda slow..
The ace machines like a fast swing speed in ID mode, and
get more depth that way. You might try some fast swings
over that dime and see what happens.
I don't think I would worry too much.. Normally, the 250
hits pretty good on dimes.
MK

 

[AndyNM]

The Ace gets the best depth in the All Metal Mode.(Up to two inches more than Coin Mode.) Make sure to set sensitivity to the point until the detector gets unstable and than go back one notch.
Tape the coil cable straight up the lower rod...that way you can run sens higher without falsing.

Andy

 

[nealcat]

I tried the ACE in all metal mode with different scan speeds and directions. Just won't detect it. The BH Time Ranger will detect it in only one direction as long as the sensitivity is at max. The Tesoro Conquistador will detect it in any direction as long as the sensitivity is 8 or above, with 10 being the highest before it goes into the red. My GTI 1500 will detect it as long as sensitivity is 7 or above. It will also show B size and 5" depth. However, it does not i d it as a dime, but as a $1. The BH also i d it as a $1. I don't think anything is wrong with the ACE since the BH and Tesoro will only detect it with sensitivity settings one wouldn't normally use. Turn their sensitivity down one notch and they won't detect it either. As for as the 1500, I usually run it at 8.

 

[AndyNM]

If it doesn't detect it in All Metal with sensitivity at a high value it could be the ground minerals or a target nearby that is masking the coin. Due to the large inner loop of the coil the Ace is not very good in trash. Try the Conquistador and check for an iron target close to the coin. If taht doesn't help than it is just the depth limit for the Ace in your soil.

Andy

 

[nealcat]

Thanks for your input. I believe you are right.

 

[Neil in West Jersey]

n/t

 

[JT2]

Andy, have you actually tested this?

The air tests that I've done with the Ace250 show no depth difference between all-metal versus coin mode. The only thing that I've seen affect depth is the sensitivity.

 

[nealcat]

n/t