I can help -- first thing you need to do is to understand how a metal detector works * it puts out an "electrical field" under its coil --as you swing the coil over metal the metal causes the field to be "disturbed" --different types of metal disturb it to different degrees , the size of the item also matters --it called "electrical conductivity" --one metal is more conductive than another --that's how a detector attempts to sort aluminum from iron or silver-- with the tracker IV --there are 3 tones -- a blat (fart sound) it means iron -- a dull ping (mid tone) that's for nickles , aluminum and gold --a sharp ping --means copper cents pre 83 --clad dimes and quarters and silver items and coins --- to proper set your discrimation for discrimation mode you will need a nickel or gold item and a pulltab --go outside find a clear bit of metal free ground (scan in all metal first to be sure) --the place the pulltab on the ground --as well as the gold item /nickel about 3 feet apart -- put the toggle switch into "disc mode" turn the disc knob all the way the left --now wave the coil over the pull tab --it should "ring up" --slowly wave it over it while turning the "disc" knob to the right --until it stops "ringing up" --now check it with the nickel / gold item --if they ring up -- great your set to go --if not very slowly go back to the left until it does "ring up"-- note the nickel / gold item should sould crisp and sharp "ping" the pulltabs if they come in at all should sound "crackly or fuzzy"--noticeably different
being a "sound only" anolog type machine --the sound and tones the machine makes are quite important --that how it "tells" you what it thinks it has found --some items while made of different metals and different sizes will have a very similar "electrical conductivity level" --like nickles, some gold items and aluminum pull tabs --some can be sorted out but others can't be --so if you want gold --you will have to dig tabs
