When you're trying to determine if you've detected a AU $1 or $2 dollar coin or an Aluminum screw cap that's not been crushed and that's not disfigured and that's of a particular gauge, I'd say you can do this using the a Digital Number display or a Smartfind curser location. I'd do this mostly with SOUNDS in CONDUCT as your guide, but for only about 80% of the time using the Explorer. You may also want to group the different Aussie coins together in pairs plus and see what the Explorer tells you then.
The targets audio response is usually good but not in the standard pattern. Try it and you'll see what I mean. There is no trick. I've found this to be the case with the Explorer XS , EX 2 and the SE. There is a consistency in how the Explorer reacts to the AU $1 and $2 . You should eventually realize this and most times will know what you are about to dig I find that this also depends on the right amount of Sensitivity used. Don't go TOO high as that consistency gets lost, if the coin goes outside of the most positive detecting depth.(To deep the target becomes "IFFY") It's not 100% capable of separating those two denominations of the Aussie coins form theses aluminum bottle caps BUT most if not all others, including the old copper and silver, sit in there in their own "domain" on the screen and in the audio output of the Explorer.
If you can get the desired result from those other detectors , then the Explorer is obviously not the one you should be using.
I remember showing pinpointa(Ray H) what the Explorer did over some examples of aluminum bottle caps he had brought along to try.(I even impressed myself how Explorer handled and identified these targets). Again, wasn't %100 and this was when he used to use his M/L Quatro.........regardless of this, he sold that Quatro and got himself the X-trerra 70.......not the Explorer. Ray does very well with his X-Terra......very well.
This could mean that the X-terra, has an edge over the Explorer genre of detectors in their ability to the AU $1and $2 coins over these aluminum bottle caps and maybe it does so in any shape or form that they might be laying in the ground in than what .
You may need to consider a very wild card........the Whites MXT. What a AU $1 and $2 coin finder IT is...........but that's mainly in the hands of the well trained. It will find many AU $1and $2 over anybody else detecting ..........BUT I feel that's mainly because the user of this detector walked over the target before I did, with my properly set up and properly functioning Explorer...........I can tell you it's rare for me to miss anything........bottle cap or not.
It's a tough one because I remember when I first started to use the Explorer and wanted so much to exclude ALL aluminum bottle caps which I could have BUT to the exclusion of the AU $1,$2 coins. I was looking in park lawns that need a minimal amount of damage and finding less aluminum bottle caps would have help. No it's ,not possible to id 100%.
When I find a target that may be a bottle cap , the easiest way to tell what it is, if your convinced it isn't, when it's under a lawn , is to first accurately pin point it and then stab at it with a firm push with a pencil thin or less bronze shaft or pointy sharpened screwdriver probe. The probe , if it finds it target basically square on, will penetrate an aluminium bottle cap most if not all of the time and this is where you might learn, like I did, to determine the targets "viably".
take care
David Di